Untitled - Geothermal Master Program ITB

Transcription

Sponsorships
Content
Contents ................................................................................................................................................ 1
Welcome Remarks ............................................................................................................................... 3
About ITB International Geothermal Workshop ............................................................................ 4
Background and Objectives ................................................................................................................ 4
Organizing and Technical Committee ................................................................................................. 5
Workshop Venue Map ........................................................................................................................ 6
ITB Campus Map ............................................................................................................................. 6
Room Layout ................................................................................................................................... 7
Programme
Pre-Workshop Courses ....................................................................................................................... 9
Pre-Workshop Course 1 (ISOR, QED, SATE PTE LTD) .................................................................... 11
Pre-Workshop Course 2 (GEOCAP) ............................................................................................... 12
Pre-Workshop Course 3 (ITB) ....................................................................................................... 13
Workshop ............................................................................................................................................ 15
Plenary Session ................................................................................................................................. 17
Mid-Workshop Course ...................................................................................................................... 18
Parallel Technical Session ................................................................................................................. 19
Post-Workshop................................................................................................................................... 27
Field Trip............................................................................................................................................ 29
Field Camp......................................................................................................................................... 30
Abstract ............................................................................................................................................... 33
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Welcome Remarks
Dear Colleague,
Following the success of the last four workshop, Geothermal Technology Master Program of
Institut Teknologi Bandung (ITB) is planning to organize the Fifth Annual ITB International
Geothermal Workshop 2016 (5th ITB IGW 2016). This event is an immediate response from
academic, government, and industrial geothermal community by unifying forces to
accelerate geothermal development in Indonesia. This year theme “The New Era: Initiatives,
Strategies, Opportunities, and Challenges toward Geothermal Development in Indonesia”
will bring new information about current research, innovation, and results of exploration
and engineering activities regarding geothermal developments. Particularly, this coming
event will focus on all aspect and issues as the impact of new geothermal regulation which
has been implemented last year.
This event, which includes pre-workshop courses and trainings, plenary sessions, technical
paper presentations, mid-workshop courses and geothermal field camp and field trip, will be
held at Campus Centre (East Side) and Gallery Room in Campus Centre (East Side) in ITB
Campus, Bandung, Macrh 28th-April 2nd, 2016. The panel discussion and paper presentation
event will be hosted by distinguished speakers which cover the following topics:
1. Education and Research
2. Business and Regulation
3. Exploration
4. Exploitation
5. Environmental aspects
They will speak about the current innovation and creativity on geothermal exploration,
exploitation and development not only for the geothermal resources but also for the human
resources that support the acceleration geothermal development.
We invite you to join our informative and exciting program in this 5th workshop which
includes pre-workshop courses and trainings, plenary sessions, technical paper
presentations, mid-workshop courses and geothermal field camp and field trip.
Sincerely,
5th
Suryantini
ITB International Geothermal Workshop Organizing Committee
3
About ITB International Geothermal Workshop
Background
The 5th Annual ITB International Geothermal Workshop 2016 is special event since it is the
5th anniversary Workshop and it will be different from the previous event. This year event
will focus more on educating geothermal community with more courses and invited speaker
from various expertise. The course such as “Environmental Assessment, Risk Analysis, and
Project Decision” by GEOCAP, “Geothermal Exploration” course by IAGI and invited speaker
from Iceland Geo-survey (ISOR), and many more will share their knowledge on developing
geothermal in their country and their other overseas projects. The other purpose of this
event is to discuss the latest condition of geothermal energy industry in Indonesia after the
approval of new regulation of geothermal energy UU No 21 Tahun 2014.
Objective
The workshop will have the following exclusive objectives:



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Educate the community about the geothermal energy from exploration, exploitation,
environmental aspects and regulation.
Discuss the latest condition of geothermal energy in Indonesia after the approval of
new regulation of geothermal energy UU No 21 Tahun 2014.
To draw attention from scientist, engineers, including academia, industrial
stakeholders, and also geothermal leaders about the initiatives, strategies,
opportunities, and challenges toward geothermal development in Indonesia.
Organizing and Technical Commitee
Steering Committee
Nenny Miryani Saptadji and Staff of Geothermal Technology Study
Program, FTTM – ITB
Antonie de Wilde (SATE PTE LTD-Singapore)
Chairman
Suryantini
Vice Chairman
Ali Fahrurrozie, Akhmad Kunio Pratopo
Secretary General
Angga Alfandi Ahmad, Evanda Eko Putra, Fitri Oktaviani
Purwaningsih
Treasurer
Rizki Trisna Hutami, Betseba br Sibarani
Creative Team
Hibban Hammka, Ali Fahrurozie, Hendro Wibowo
Sponsorship,
Publications
& Promotion
Pre – Workshop
Course
Technical Session &
Planning
Field Trip
& Field Camp
Prihadi Soemintadiredja, Fikri Adam Dermawan, Rully Abdul Malik,
Fransiscus Xaverius Guwowijoyo, Damar Nandawardhana, Gugun
Abdurrahman, Hutra Guswinanda, Andhika Arief Rachman
Dimas Taha Maulana, Allen Haryanto Lukman, Fikri Adam
Dermawan, Famelia Nurlaela
Asep Saepuloh, Suryantini, Nurita Putri H, Juni Yesy Sianipar, Setya
Drana Harry Putra, Anggie Rengganis, Agastyo Nugroho, Heru Berian
Pratama
Qodri Syahrur Ramadhan, Silvester Dimas Sanjaya, Mahesa Pradana,
Ratih Nurruhliati
Exhibition
Mahesa Pradana, Rully Tri Abdul Malik
Reviewer Team
Suryantini, Hendro Wibowo, Sutopo, Zuher Syihab, Prihadi
Darminto, Prihadi Soemintadiredja, Jooened Hendrasakti, Fiorenza
Deon (GFZ), Chris Hecker (Twente University), Hendra Grandis,
Rachmat Sule, Nenny Miryani Saptadji, Antonie de Wilde, Joe
Iovenitti, Erwin Dasapta
Logistic
Qodri Syahrur Ramadhan, Welly Todheus, Fhandy Pandey
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Workshop Venue Map
ITB Campus Map
6
Workshop Venue Map
Room Layout
Parallel Technical Session Venue Map
Room Layout
7
8
PROGRAMME
Pre – Workshop Courses
9
10
Pre-Workshop Course 1
Monday-Tuesday, March 28-29th 2016
Geothermal Drilling and Negotiating Integrated Drilling Services Contract
(ISOR, QED, SATE PTE LTD)
Venue
Lecturers
Auditorium Campus Center
Antonie de Wilde (SATE), Sverrir Thorhallsson and Dadi Thorbjornsson
(ISOR - Iceland), Renato Escalante (QED)
Day 1 :
08.00-10.00
10.00-10.30
10.30-11.45
11.45-12.30
12.30-13.30
13.30-15.00
15.00-15.30
15.30-17.00
Overview of various types of geothermal systems. Implication on drilling
approach and utilization
Exploration drilling vs. production drilling
BREAK
Geothermal well designs, large holes vs. slim holes
LUNCH
Selection of drilling equipment
Selection of drilling fluids and cementing procedures
Chemical sampling and interpretation
Environmental impacts of drilling and testing
BREAK
Monitoring and use of rig data to improve drilling efficiency and solve
drilling problems
ISOR
ISOR
ISOR
ISOR
ISOR
Day 2 :
08.00-10.00
10.00-10.30
10.30-11.45
11.45-12.30
12.30-13.30
13.30-15.00
15.00-15.30
15.30-17.30
17.30-18.00
Preparation of the “Drilling Program” document
ISORSATE
BREAK
Drilling contracts
SATE
LUNCH
Mud logging
Well logging and well completion tests
Well testing
Flow rate measurements (Russel James and TFT)
BREAK
Case Study: The Experience of drilling SH1 and SH2 in Mindoro
Closing
ISOR
ISOR
QED
11
Environmental Assessment, Risk Analysis, and Project Decision
(GEOCAP)
Venue
Lecturers
Meeting Room 5 and 6, 3rd Floor, East Campus Center
Christian Bos (TNO, NL), Kees van den Ende (DNV GL), Rianne ‘t Hoen (DNV GL),
Triarko Nurlambang (UI), Ali Ashat (ITB)
Day 1 :
08.00-10.00
10.00-10.30
10.30-11.45
11.45-12.30
12.30-13.30
13.30-15.00
15.00-15.30
15.30-17.00
The energy landscape
- Paris COP21
- Energy transition strategies
- Renewable energy schemes
GEOCAP
Break
Outlook Indonesian energy mix
- Roadmap development
- Geothermal policy framework
- Early experience/ lessons learned
LUNCH
Social License to Operate (Strategic environmental assessment)
- Environmental aspects (flora, fauna, soil, landscape, humans,
cultural heritages)
SEA criteria
- Consideration alternatives
- Methods of comparison (Leopold matrix)
- Significant effect and mitigation measures
Break
Working with SEA – exercises geothermal
GEOCAP
GEOCAP
GEOCAP
GEOCAP
Day 2 :
08.00-10.00
10.00-10.30
10.30-11.45
11.45-12.30
12.30-13.30
12
Geothermal plant project phases and decision making
- Decision moments
- Decision criteria
- Bankability criteria
Break
Strategies for decision making
- Decision strategies and evaluation criteria
- Methodologies and processes
- Decision tree analysis
- Multi-criteria analysis
LUNCH
Risk analysis methods
- Sensitivity analysis
GEOCAP
GEOCAP
GEOCAP
13.30-15.00
15.00-15.30
15.30-17.30
17.30-18.00
Risk mitigation
- Real option
- Costs of knowledge
- Portfolio management
Break
Decision making with confidence –exercises risk analyses and
decision making geothermal
Closing
GEOCAP
GEOCAP
Geothermal for Everyone
(ITB Geothermal Study Program)
Venue
Meeting room 4, 3rd Floor, East Campus Center
Lecturers
Suryantini, Nenny Miryani Saptadji, Ali Ashat
DAY 1
08.00-10.00
10.00-10.30
10.30-12.00
12.00-13.00
13.00-15.00
15.00-15.30
15.30-17.00
Geothermal System; Type, Worldwide Occurrence and Utilization
Coffee Break
Geothermal Manifestation and Geothermal Exploration
LUNCH
Engineering and Exploitation of Geothermal Energy
Coffee Break
Economic and Environmental Issue of Geothermal Energy Utilization
13
14
PROGRAMME
Workshop
15
16
Plenary and Technical Sessions
Wednesday-Thursday, March 30-31st 2016
PLENARY SESSION
Wednesday, March 30th 2016
PLENARY SESSION
Venue
East Hall (Aula Timur) ITB Campus, Jalan Ganesha 10, Bandung.
Opening and Keynote Speaker
Welcoming remark from the Chairman of IIGW
2016
National Anthem : Indonesia Raya
Opening Speech of the IIGW 2016 by the Dean of
09.05-09.15
Faculty of Mining and Petrouleum Engineering
09.00-09.05
09.15-09.45
Keynote Speech-1: Geothermal Development Plan
within National Energy Council Road Map; Will it
be successful?
09.45-10.15
Keynote Speech-2: Geothermal Law
Breakthrough; Latest Condition and Future Impact
Suryantini
Sri Widiantoro /Dean
FTTM
Abadi Poernomo /
Chairman of Indonesian
Geothermal Association
(INAGA), Member of
National Energy Council
(DEN).
Yunus Saefulhak /Director
of Directorate of
Geothermal-Ministry of
Energy and Mineral
Resources
COFFEE BREAK
PLENARY SESSION 1
Overcoming the Stagnancy in Geothermal Development
10.30-11.00
The Role of National Exploration Committee (KEN)
in Accelerating Geothermal Development in
Indonesia and its implication to Geothermal
Industry, Government and Academic Society.
Andang Bachtiar /
Chairman of National
Exploration Committee
(KEN)- Ministry of Energy
and Mineral Resources
11.00-11.30
PGE strategy to support Government of Indonesia
goal in 2025
Ali Mundakir/ Director of
Operation, PT PERTAMINA
GEOTHERMAL ENERGY
11.30-12.30
OPENING OF LIMITED EXHIBITION, PHOTO CONTEST and POSTER SESSION
LUNCH BREAK
17
PLENARY SESSION 2
Lesson Learned from Geothermal Development
13.15-13.45
Lesson learns from re-negotiating electric price
13.45-14.15
Learning from more than 60 years of Geothermal
History-the benefits to Today’s Developers
Peter Wijaya / VP Star
Energy Geothermal
Alex Smillie
(Tawau Green Energy
Malaysia)
COFFEE BREAK
PLENARY SESSION 3
Expanding the role of national human resources beyond the country
15.00-15.30
15.30-16.00
16.00-16.30
16.30-17.00
17.00-18.30
18.30-20.00
GEOCAP plan for increasing the role of
Indonesian Human Resources in International
Geothermal Industry
IAGI (Indonesian Association of Geologist) plan to
advance and expand geothermalist skill and
knowledge to face MEA (ASEAN Economic
Community)
SATREPS: Japanese Academic Institution strategy
for strengthening geothermal community
knowledge and skill in Indonesia
Gathering and Networking
Sanusi Satar
(GEOCAP)
Sukmandaru Prihatmoko
(Chairman IAGI)
Sudarto Notosiswojo (ITB)Katsuaki Koike (Kyoto
University)
MC: Sanusi Satar-Nenny
Saptadji
Celebration of the 5th ITB International
Geothermal Workshop: Speech, Dance and
Music Performance Videos
GALA DINNER
Mid-Workshop Course
Thursday, March 31th 2016
Geothermal Exploration
(IAGI-Ikatan Ahli Geologi Indonesia/Indonesian Geologist Association)
Venue
Meeting room 3, 3rd Floor, East Campus Center
Lecturers
Imam Baru Raharjo (PGE), Basuki Arif Wijaya (Independent Consultant,
Former Chevron Geochemist), Arief Sunu (MEDCO)
Time
13.30 – 15.30 (2 hrs)
18
Parallel Technical Session
Information
Power Point File Check-In
For you who have not yet sent us your power point file via email in advance, you will be
asked to give your powerpoint file on first day of workshop (March 30). Please visit the
power point check in desk in East Hall ITB on March 30.
Time Allowance
The time allowance for each presentation in Technical Session is 15 minutes followed with a
5 minutes of Questions and Answers Session, which means that the total time you will have
is 20 minutes. The speakers will be announced when the time lapse.
First announcement: You will have 5 minutes to finish your presentation (10 minutes passed)
Second announcement: Your time is up (15 minutes passed)
Note for the Speakers:
Please be present in the room where you will give presentation 15 minutes before your
session starts.
INVITED SPEAKER:
Speakers
Time
ISOR
Auditorium ( 09.30-10.10)
GEOCAP
SATREPS
Andri Dian Nugraha (ITB)
Room 4
(09.30-10.10)
Bonar Tua Halomoan Marbun (ITB)
Room 4
(10.30-11.10)
Tobias Fischer (New Mexico Univ. USA)
Room 5
(09.30-10.10)
Pri Utami (UGM)
Room 5
(13.30-14.10)
Wahyu Sri Gutomo (ITB)
Room 6
(09.30-10.10)
Clare Baxter (LEAPFROG)
Room 6
(13.30-14.10)
19
20
Parallel Technical Session
Thursday, March 31st 2016
VENUE: EAST CAMPUS CENTER
TIME
AUDITORIUM
ENGINEERING
ROOM 4
GEOPHYSICS
ROOM 5
GEOLOGY
ROOM 6
GEOPHYSICS
SESSION
Chairperson: Ali Ashat & Famelia
Nurlaela
Chairperson: Prihadi Sumintadireja &
Dian Darisma
Chairperson: Arief Susanto & M.
Nurwahyudi Yulianto
Chairperson: Hendra Grandis &
Angga Bakti P.
08:30 – 08:50
Numerical Simulation for Natural State
of Two-Phase Liquid Dominated
Geothermal Reservoir with Steam Cap
Above Brine Reservoir (Heru Berian
Pratama and Nenny SaptadjiGeothermal ITB) [042]
Resistivity Method for Hydrothermal
System Analyze in Way Ratai
Geothermal Field
(Widia A. and Bagas S.-UNILA)
[097]
Volcanostratigraphy for Supporting
Geothermal Exploration (Sutikno Bronto,
Juni Yesy Sianipar, and Akhmad Kunio
Pratopo,-PSG and Geothermal ITB) [090]
Gravity Modelling and Second Vertical
Derivative Calculation to Analysis
Subsurface Structure at Wayratai
Geothermal Prospect Area, Lampung
(Taufiq-Univ. Lampung) [091]
08:50 – 09:10
Performance Prediction of Two-Phase
Geothermal Reservoir Using Lumped
Parameter Model (Famelia Nurlaela
and Sutopo-Geothermal ITB)
[121]
Volcanolostratigraphic Study in
Constructing Volcano Chronology and its
Implication for Geothermal Resource
Estimation; Case Study Mount Sawal,
West Java (Fikri Adam Dermawan,
Hibban Hamka, Rully Tri Abdul MalikGeothermal ITB) [037]
Identifying the Distribution of Alteration
Zone Using Very Low Frequency Method in
Candi Gedong Songo, Ungaran, Semarang,
Central Java (Alfianto, A.D., Almas, S.A.,
Ambariani, S.G., Kurniawan, W.S., Sari,
D.P., Suyanto, I - UGM)
[009]
09:10 – 09:30
Resource Management using
Numerical Modeling and Apparent
Productivity Index (William L. Osborn,
Dennis Kaspereit, William Rickard,
Mary Mann, Magdalena PerezGeothermal Resource Group,
Momotombo Power Company) [115]
The Cooling History Of Residual Magma
As Heat Source
(I G.B. Eddy SUCIPTA and Isao
TAKASHIMA-Geological Eng. ITB and
Akita Univ Japan)
[112]
Characterization Of Diwak-Derekan
Geothermal System Using Magnetotelluric
Data (Agung Wibawa, Udi Harmoko,
Rahmat Gernowo – UNDIP) [004]
Volcanic, Magmatic and Hydrothermal
Gas Discharges
(Prof. Tobias Fischer-New Mexico Univ.
USA)
Magneto-telluric: Principle and Case
History (Wahyu Sri Gutomo – ITB)
09:30 – 09:50
09:50 – 10:10
10:10 – 10:30
Geothermal Drilling Case History
(ISOR)
Geophysical Exploration For
Geothermal Low Enthalpy Resources In
Ungaran Regency, Central Java
(Udi Harmoko, Hiska Anggit, Gatot
Yulianto, Sugeng Widada, Yusud D.UNDIP, Semarang State Polytecnic)
[095]
Literature Review Of Radar Remote
Sensing Combined With Continuous
GPS Measurements For The
Monitoring Of Deformations Of
Geothermal Fields (Jane Mbogo and
Josephat Kebu-Kenya Electricity
Generating Company)
[050]
Micro Earthquake: Principle and Case
History for Geothermal Exploration
and Exploitation
(Andri Dian Nugraha-ITB)
COFFEE BREAK
21
TIME
SESSION
10:30 – 10:50
AUDITORIUM
GEOCAP
Chairperson: Chris Hecker &
Ichwan Elfajrie
Minigeo : Small Scale Geothermal
Power for Remote Off-Grid
Communities
(N. Willemsen, J.H Kleinlugtenbelt, A.
Willemsen-IF Technology)
Characteristic Of Geothermal Fluid At
East Manggarai, Flores, East Nusa
Tenggara (Mochamad Iqbal, Niniek Rina
Herdianita, Dikdik Risdianto-ITB)
Geothermal Drilling: Principle and Constrained
(Bonar Tua Halomoan Marbun-ITB)
[101]
11:10 – 11:30
11:30 – 11:50
11:50 – 12:10
12:10 – 13:30
22
ROOM 5
GEOLOGY-GEOCHEMISTRY
Chairperson: Mahesa P. Saputra &
Rizki Trisna
Quantitative Comparison of Two 3-D
Resistivity Models of the Montelago
Geothermal Prospect
(W.A. van Leeuwen, Suryantini, G.P.
Hersir-IF Technology, ITB, ISOR)
[096]
10:50 – 11:10
ROOM 4
DRILLING
Chairperson: Dimas Taha Maulana & Andhika
Akib
Hydraulic Fracturing and Coupled
Modelling for Geothermal Energy
Applications
(Peter Fokker-TU Delft)
Geothermal Exploration Indonesia by
Means of Rock Petrology and Water
Geochemistry
(Fiorenza Deon-TU Delft)
Geology Structure Identification
based on Polarimetric SAR (PolSAR)
Data and Field Geological Mapping at
Ciwidey Geothermal Field
(Ratna Amalia Pradipta, Asep
Saepuloh, and Suryantini-ITB) [079]
A Collaborative Engineering Approach To
Achieve Success In Geothermal Drilling
Application (Yudi Indrinanto, Manuel Centeno
Acuna, William Thomas, Michael Ari Dhanto,
Agus Ziyad Kurnia, Erik Gunawan Supriatna,
Bonar Marbun Noviasta, Donny Trias Ardianto,
M.R. Yoan Mardiana-Schumberger) [116]
[061]
Geochemical Study Of Ampalas
Geothermal Area, Mamuju District, West
Sulawesi Province (Fithriyani Fauziyyah, ,
Muhammad Ghassan Jazmi Shalihin,
Dede Iim Setiawan, Anna YushartantiITB) [038]
Geothermal Fluid Characteristic Based
on Fluid Geochemistry Analysis,
Kepahiang, Bengkulu
(Novian Triandanu, Agil Gemilang R,
Ichsan Alfan, Inge Sukma Y, Sapari
Hadian G-UNPAD)
[075]
Analysis on Scaling Problem in Injection
Line: A Case from Muara Labuh
Geothermal Field, Indonesia
(Alfiady, Robi Irsamukhti, Alfianto
Perdana Putra, Herwin Azis and Jantiur
Situmorang-Supreme Energy) [117]
Drilling Bit Optimization In Supreme Energy
Geothermal Exploration Drilling
(Bambang S. Roesdyoko, Dodi A. Gauzali,
Gilang Rifki A. – Supreme Energy) [017]
Optimal Geothermal Well Cementing A Case Of
Olkaria Geothermal Field
(Nahashon Karanja Nzioka-Kenya Electricity
Generating Company) [070]
Occurrence Of Sarawet Hot-spring: What
Affects The Outflow?
(Draniswari, W. A and Hendrawan, R. NITB) [111]
ROOM 6
EXPLORATION
Chairperson: Asep Saepuloh &
Betseba Br. Sibarani
Geothermal Exploration Impact In
Ground Water Level Case Study:
Gedongsongo, Ungaran, Semarang, Jawa
Tengah
(Annisa Rizqilana, Hafidz Galant Amirul,
Anindya Estiandari, Fandy FahrezaUNDIP) [015]
The Potential and Development of Way
Ratai Geothermal Prospect Area as A
Solutions of Electricity Crisis at Lampung
Province
(Evi Muharoroh-UNILA)
[031]
Assessing The Possibility Of Enhanced
Geothermal System In Western
Indonesia
(Hendrawan, R. N and Draniswari, W. AITB)
[041]
Subsidence Causes, Effects, and
Mitigations in Geothermal Field
(Akta Sektiawan, Ganung Adi Prasetyo,
Dida Patera Adli, Ethis Yuantoro-ITB)
[008]
Assessment Thermal Flow Direction of
Geothermal Manifestation Based on
Temporal Analysis of Temperature
Distribution at Pine Forest Park,
Tomohon, North Sulawesi
(Roy Wenas, Cyrke A.N Bujung-UNIMA)
[131]
LUNCH
TIME
SESSION
13:30 – 13:50
AUDITORIUM
SATREPS
Chairperson: M. Nur Heriawan &
Reyno
Studies Design for BAGUS
SATREPS Project
(Prof. Katsuaki Koike, Kyoto Univ.
Japan)
13:50 – 14:10
ROOM 4
ENGINEERING
Chairperson: Sutopo &
M. Mirza
A Comprehensive Well Testing Implementation
During Exploration Phase in Rantau Dedap,
Indonesia
(Muhammad Tamrin Humaedi, Alfiady, Alfianto
Perdana Putra, Rudy Martikno, Jantiur
Situmorang-Supreme Energy) [119]
Numerical Model of Unsteady Two-phase Flow
for Geothermal Production Well
(Yasunari Katayama, Ryuichi Itoi, Toshiaki
Tanaka-Kyushu Univ, Japan) [054]
ROOM 5
EXPLORATION GEOLOGY
Chairperson: Fiorenza Deon &
Yosi Amelia
Hydrothermal Alteration; Identification
and its importance in geothermal
exploration and exploitation
(Pri Utami-UGM)
ROOM 6
EXPLORATION
Chairperson: Anggie Rengganis &
Mona Natalia S.
3D Geothermal Conceptual Modeling
(Clare Baxter-LEAPFROG)
14:10 – 14:30
Radon Prospecting at Wayang
Windu (T. Kubo, and K. Koike,
Kyoto Univ. Japan)
On the Feasibility of Geothermal Heat
Production from A Hot Sedimentary Aquifer : A
Case Study of the Jababeka District, West Java
(Nurita Putri Hardiani, Setya Drana Harry Putra –
Geothermal ITB)
[134]
14:30 – 14:50
Hydrogeochemistry Study at
Bandung Basin
(Andre, Irwan Iskandar, Sudarto
N.-ITB)
Mathematical Modelling of Silica Scaling
Deposition in Geothermal Wells
(Muhammad Nizami and Sutopo-ITB)
[066]
Use Of Sub-Terrain Technology In
(George Barber, Madjedi Hasan and
Anton Wahjosudibjo-IEP and
PENConsulting) [122]
Geological, Isothermal, and Isobaric 3-D
Model Construction in Early Stage of
(Mahesa Pradana Saputra, Suryantini,
Danilo Catigtig, Riky Regandara, Sitti Nur
Asnin, Angga Bakti Pratama – Geothermal
ITB, Emerging Power Inc., Philippiners)
[107]
Classifying Hot Water Chemistry:
Application Of Multivariate Statistics
(Prihadi Sumintadireja, Dasapta Erwin
Irawan, Yuano Rezky, Prana Ugiana Gio,
Anggita Agustin-ITB, USU) [114]
14:50 – 15:10
Characterizing Geothermal
Surface Manifestation Based on
Multivariate Geostatistics of
Ground Measurement Data
(Ishaq, M. Nur Heriawan, Asep
Saepuloh-ITB) [048]
Decline Curve Analysis in Liquid-Dominated
Geothermal Reservoir for Optimizing and
Forecasting in Production
(Iki Hidayat-ITB)
[044]
Influence of Hydrothermal Alteration
on Petrophysical Properties of Rocks in
the Cibolang Area, Bandung
(Arif Susanto-ITB)
[132]
Geology and Prospecting for Hidden
Geothermal System of Manglayang
Volcano Complex of Bandung-West Java
(Subandrio, AS., Sumintadireja, P., Irawan,
D., and Suryantini (ITB) [135]
15:10 – 15:30
Conceptual Model Of Sorik Marapi
Geothermal System Based On 3-G Data
Interpretation
(Birean D. Sagala, Vicky R. Chandra,
and Dorman P. Purba-SORIK MARAPI
GEOTHERMAL POWER) [019]
COFFEE BREAK
23
TIME
SESSION
15:30 – 15:50
15:50 – 16:10
Identification of Surface Manifestation at
Geothermal Field Using SAR Dual Orbit
Data (Dinul Akbari and Asep Saepuloh-ITB)
[024]
16:10 – 16:30
Identification of Geothermal Fluid Paths at
Ground Surface on Segment Tracing
Algorithm (STA) of the ALOS PALSAR Data
(Haeruddin, Asep Saepuloh, and M. Nur
Heriawan-ITB) [039]
16:30 – 16:50
Performance Analysis of Mineral Mapping
Method to Delineate Mineralization Zones
Under Tropical Region (Muhamad Hardin
Wakila, Asep Saepuloh, and M. Nur
Heriawan-ITB) [062]
16:50 – 17:10
24
AUDITORIUM
SATREPS – Remote Sensing
Chairperson: Roy Wenas & Akhmad
Kunio Pratopo
The Effectiveness of Hydrothermal
Alteration Mapping based on
Hyperspectral Data under Tropical Region
(Reyno Rivelino D.M and Asep SaepulohITB) [081]
ROOM 4
DIRECT USE
Chairperson: Jooned H. & Waldy Afuar
Experimental Study of Isothermal Plate
Uniformity For Blood Warmer Development
Using Geothermal Energy
(Y. Ichsan, J. Hendrarsakti-ITB) [098]
A Preliminary Research Of Direct Contact
Geothermal Steam Condensation In The
Presence Of Non Condensable Gas
(Vivi A, Willy A, Ari D. Pasek, YB. Agastyo N,
Candra M. S, Abdurrachim-ITB) [118]
Geothermal Direct Use Development To
Optimize Renewable Energy Utilization For
Agricultural, Aquacultural And Tourism
Activities In Indonesia
(Nicolas Jalu Pangesty, Muhammad Dzulfikri
Firdaus, Adidanu Saputra-UNDIP)
[074]
Feasibility Of Geothermal Energy Extraction
From Non-Activated Petroleum Wells In Arun
Field
(Muhammad Syarifudin, Kalvin Maurice,
Franky Octavius-ITB) [067]
ROOM 6
POWER PLANT
Chairperson: Nur Santy Elizabeth & Fuad
The Development of Integrated Plant Model by
Utilizing Wasted Heat in Water-dominated
Geothermal Source (Cukup Mulyana, Aswad H.
Saad, M. Ridwan Hamdani, Fajar MuhammadUNPAD) [022]
Economic And Thermodynamic Analysis For
Preliminary Design Of Dry Steam Geothermal
Power Plant (GPP) With Multifarious Gas
Removal System (GRS) in Kamojang, West Java,
Indonesia (A. Damar P, Sihana, Kutut S, Fiki R. SUGM) [002]
Energy Optimization Modeling Of Geothermal
Power Plant (Case Study: Darajat Geothermal
Field Unit III) (Rizal Sinaga-DEL)
[083]
CLOSING CEREMONY (DOOR PRIZE, BEST POSTER AND BOOTH ANNOUNCEMENT)
Poster Session
Wednesday-Thursday, March 30-31st 2016
No. Paper Title
1
2
3
4
5
6
7
8
9
Usage of Zheolite-Chitosan as Impurities Filter to Reducting Corrosion Turbine on Geothermal Plant
(Ainul Yaqin Abror A,Jesica Indah O.Wildan Ichsan S,Risko Pratama Y-UNIBRAW)
New Challenges: Feasibility Study of New Drilling and Production Technologies for Offshore Geothermal Resources in
Indonesia
(Deni Setiawan, Muhammad Syarif Ali Akbarsyah-ITB)
The Functional Shift of Old Central Sumatra Basin as Hydrocarbon Wells to Non-Volcanic Geothermal Field:
Optimization Injection Wells and Production Wells as an Effort to Create National Energy Sovereignty
(Djati Wicaksono Sadewo, Nicholas Bastian, Ridwan Chandra, Sekar Indah Tri Kusuma-UNDIP)
Integration of MT-CSAMT and Resistivity Log for Determining Geothermal Reservoir Model Based on Convection Heat
Energy Transfer
(Faid Muhlis and Risca Listyaningrum-University of Pembangunan Nasional "Veteran" Yogyakarta)
Identifying Non-Volcanic Geothermal Potential in Amohola, Southeast Sulawesi Province, By Applying Fault and
Fracture Density (FFD) Method
(Fajar Mulyana, Gian E. Tsani, Kiddy Nahli, M. Aulia Alwan, M. Hilman Darojat, Rezky N. Hendrawan-UNPAD)
Geothermal System of Mount Ungaran, Central Java, Indonesia: Characterization, Conceptual Model, and Potential
(Ibnu Dwi Bandono Wahyudi-Patra Nusa Data)
Repeat Absolute and Relative Gravity Measurements for Geothermal Reservoir Monitoring in Ogiri Geothermal Field,
Southern Kyushu, Japan
(Jun Nishijima, Chika Umeda, Yasuhiro Fujimitsu, Jun-ichi Takayama, Naoto Hiraga and Satoru Higuchi-Kyushu
University, Japan)
Volcanological Approaching for Evaluation of Geothermal Potential in Galunggung Mountain
(Qodri Syahrur Ramadhan, Akhmad Kunio Pratopo, Juni Yesy Sianipar-Geothermal ITB)
Characteristic of Geothermal Reservoir Based on Analysis of Surface Manifestation, Fluid Geochemical and Rock
Alteration; Case Study of Ungaran Volcano Geothermal Area, Central Java, Indonesia
(Muhammad Afkarul Haq, Farchan Nauval, Nashir Idzharul Huda-UNDIP)
Paper ID
007
023
025
032
033
043
051
052
063
25
No
10
11
12
13
14
15
16
26
Paper Title
The Concept of Steam Field and Geothermal Power Plant (PLTP) Development Plan, Case Study at Mount
Rajabasa
(Nanda Hanyfa Maulida and Suharno-UNILA)
Estimation of Geothermal Speculative Resource Potential Using Geochemistry Method in East Manggarai
Regency, East Nusa Tenggara Province
(Teguh Rahat Prabowo, Muhammad Ghassan Jazmi Shalihin, Aton Patonah, Fithriyani Fauziyyah, Andri Eko
Ari Wibowo-UNPAD, ITB, PSDG)
Electricity Generation from Hydrothermal Vents
(Yuzar Aryadi, Imam Saiful Rizal, and Muhammad Nur Fadhli-ITB)
Design of Tomato Drying System by Utilizing Geothermal Brine
(Afuar Waldy, Sibarani Betseba, Abdurrahman Gugun, J. Hendarsakti-Geothermal ITB)
Contamination of Thermal Water to Groundwater in Kertasari Area, Bandung
(Arif Susanto, Suryantini, Joshua Satriana, Munib Ikhwatun Iman, Noriyoshi Tsuchiya-ITB, Badan Geologi,
Tohoku Univ, Japan)
Natural State Modelling in Hululais Geothermal Field Based on Exploration Data
(Pudyo Hastuti, Sutopo and Marihot Silaban-Pertamina Geothermal Energy and ITB)
A Comparison Analysis between Russel James Equation and Hiriart Equation in Horizontal Discharge
Lip Pressure for Production Test at Geothermal Well Using Statistical Method
(Muhammad Nizami-ITB)
Paper ID
072
093
099
104
133
129
065
PROGRAMME
Post – Workshop
27
28
Field Trip
Friday, April 1st 2016
The Patuha geothermal system is a vapor-dominated reservoir located about 40 kilometers
southwest of Bandung on western Java, Indonesia. The geothermal system consists of a cap
rock, an underlying steam cap and a deep liquid-dominated reservoir. The reservoir is provided
with heat by a main heat source below Kawah Putih and the Patuha volcano. The flow of fluid
takes place through fault zones and in the low permeability reservoir rock. . The first Unit (55
MW) at Patuha was completed in 2014 and since 2015 it has been producing at full capacity
(with an availability rate of over 98%).
Purpose
This one full day field trip to Patuha Geothermal Plant provides an introduction to geothermal
resources and their utilization. The trip may include visits to Patuha Power Plant, Steam Field,
Surface Facilities and observations to the surface features/manifestations of the Patuha thermal
areas.
Transportation
We will provide participants with mini-buses for mobilization purposes. Participants will not
drive their own vehicles to and from the destined locations. The provided buses will depart
from Bandung on April 1st morning to Patuha Geothermal Plant.
Instructors
The Field Trip will be guided and instructed by the lectures and graduate students of the ITB
along with Geo Dipa representatives.
Run Down:
April 1st , 2016
05.45-06.00
06.00-08.00
08.00-09.00
09.00-09.15
09.15-11.30
11.30-13.00
13.00-17.00
17.00-19.00
Gather at ITB campus gate
Travel to PT. Geodipa (Patuha)
Safety Induction
Coffee Break
Introduction about power plant from PT. Geodipa
Break and Lunch
Trip to power plant
Travel to Bandung (ITB)
29
Field Camp
Friday-Saturday, April 1st-2nd 2016
What you will learn?
The participant will learn the full circle of applied geochemical work for geothermal survey. This
includes the theory on geothermal geochemistry, the practical work on collecting samples, carry
out the laboratory analyses, interpret the results and presenting the data.
What are the activities?
During 2 days program, the participant will stay one night in Geothermal Field Campus at
Lembang about 5 km south of Tangkuban Perahu Volcanoe, have class acticities in the camp,
visit the Tangkuban Perahu Geothermal Surface Manifestation and visit Thermochem Lab
Facilities. The program cover class activities such as theory, data analysis and data presentation,
and practical field to collect gas and water samples, and analyze the samples at the
Thermochem Laboratory.
Who should attend
Earth scientist interested in geochemical survey such as geologist, geochemist, chemist, field
sampling operator, environmental scientist, or just beginner learn about geochemical sampling
and survey in particular for geothermal.
Purpose
In particular, the goal of geothermal field camp is to provide participants with basic knowledge
and practical field techniques of geothermal exploration. These skills would be complemented
by basic data collection, sampling and theoretical data analysis that is fundamental for any
interpretation and assessment of reservoir potential.
All exercises will be completed in Domas Crater and Ratu Crater, in which these fields allow the
integration of field based structural geological analysis, observation and sampling of geothermal
manifestations as hot springs and sinters and also ultimately of structural geology and surface
geochemistry. This program introduces basic methods used in exploration geology to study
both, fault and fracture systems and fluid chemistry to give a better understanding of the
selective fluid flow along certain fractures and faults. Field geology covered the systematic
measurement of faults and fractures, fault plane and fracture population analysis. In addition,
field hydro-geochemistry focused on sampling techniques and field measurements onsite.
Transportation & Accommodation
We will provide participants with vans for mobilization purposes. Participants will not drive
their own vehicles to and from camp locations. The provided vans will depart from Bandung on
April 1st evening to stay overnight at the geothermal campus located in Lembang (± 45 km from
Bandung) soon after the workshop closing ceremony. The field camp participants will return to
Bandung on April 2nd evening.
30
Instructors
The field camp courses are taught by Prof. Tobias Fischer from New Mexico University, USA, the
lecturers and graduate students of the ITB Geothermal Magister Degree Program: Instructor to
participant ratios is ~ 4:1.
Run Down:
Day – 1 ( April 1st , 2016)
06.00-06.30
Gather at ITB campus gate
06.30-07.30
Travel to Geothermal Field Campus, Lembang
08.00-10.00
Morning class lecture: Geothermal Geochemistry
10.00-11.00
Travel to Tangkuban Perahu Volcano
11.00-12.30
Observation of Ratu and Upas Crater, Friday Praying for Moeslem, Lunch
12.30-13.00
to Domas Crater
Practical : collect gas samples at Fumaroles in Domas Crater , collect water
13.00-17.00
samples, alteration observation
17.00-18.00
to Geothermal Field Campus Lembang
18.00-19.00
Private time
19.00-20.00
Dinner
20.00-21.00
Night discussion and lecture
Day – 2 ( April 2nd , 2016)
07.00-08.00
Travel to Thermochem Lab (Participant bring all the lugage, we will not go back
to Lembang field campus)
08.00-12.00
Practical : using Gas Chromatrography, and other facilities at Thermochem
Laboratory
12.00-13.00
Lunch Break
13.00-16.00
Data Interpretation and Presentation
16.00-16.30
Closing of the field camp program
16.30-18.00
Travel to Bandung (ITB)
31
32
ABSTRACT
Technical Paper and Poster Session
33
Paper ID : 002
Economic And Thermodynamic Analysis For Preliminary Design Of Dry Steam Geothermal Power Plant (GPP) With
Multifarious Gas Removal System (GRS) in Kamojang, West Java, Indonesia
Aloysius Damar Pranadi.a, Sihanab, Kutut Suryopratomo.c Fiki Rahmatika Salisd
Engineering and Engineering Physics Department, Faculty of Engineering, Universitas Gadjah Mada,
a,b,c,d 2 Grafika Road, Sleman, Yogyakarta, Indonesia
a [email protected], b [email protected], c [email protected] d [email protected]
a,b,c,d Nuclear
ABSTRACT
According to Revision of Geothermal Resources Counting Presentation at IIGW 2015 by Mr. Amir Fauzi, Indonesia has great
number of geothermal potential separated by two kind of potential, 16.13 GW for high enthalpy and 7.88 GW for low
enthalpy speculative resources. In the end of 2013, Ministry of Energy and Mineral Resources stated that Geothermal
Power Plant (GPP) have been existed about 1.34 GW and wanted to seriously develop geothermal potential up to 6.64 GW
by 2025. Cost is one of famous obstacle in Indonesia’s GPP Development. To reduce grand total cost of GPP, this paper will
present the relation between thermodynamic and economic analysis in purpose to find the most economical gas removal
system in GPP.
By gleaning data at Kamojang Steam Field on behalf of PT Pertamina Geothermal Energy, this study will thermodynamically
analyze and calculate a GPP preliminary design with software, named as Cycle Tempo 5.0. In additional, writers create
motive steam calculator (based on C++ language) to enhance thermodynamic analysis for gas removal system (GRS). After
thermodynamic analysis has been done, economic study will be undertaken by Net Present Value Analysis to compare the
utilization cost of three different GRS and find which kind of GRS is more economical for nearly 30 years operation. For the
result, Dual LRVP has higher performance than the others, spend less based on NPV utilization cost and is more economical
for nearly 30 years operation. In conclusion, GPP with Dual LRVP is proper to be developed in the future Geothermal Power
Plant or to replace the existing GRS in some existing GPP in Indonesia.
Keywords: Geothermal Power Plant; Thermodynamic Analysis; Economic Analysis; Gas Removal System
Paper ID : 004
Characterization of Diwak-Derekan Geothermal System Using Magnetotelluric Data
A Wibawa1, U Harmoko1, L Handayani 2
Department, Diponegoro University
Jl. Prof. Soedharto, Tembalang, Semarang, Indonesia 50275
2LIPI Center for Geotechnology Research
Jl. Sangkuriang, Kompleks LIPI, Bandung, Indonesia 40135
[email protected]
1Physics
ABSTRACT
An investigation of the Diwak-Derekan geothermal field using magnetotelluric survey has been conducted. Initial geological
survey provided clue that the most likely area to find a heat source is on the Southeastern region of an acreage covering
433000-445000 longitude and 9200000-9210000 latitude as it is dominated by the presence of breccia. But inversion result
of the gathered data indicate that any sign of heat source is not detected in that suspected region as lower resistivity layers
extend to 5,000 m deep. However, a promising signature of a heat source is detected on the upper part of that region, an
area filled with lava. This finding is certainly interesting, and hence it is deemed that the Diwak-Derekan geothermal field is
located on a bed of rocks resulted from an uplifting seafloor that make up most of the Java island. This should give
advantage as thicker layer of rocks may help keep high temperature at the reservoir that makes it a promising geothermal
prospect.
Keywords: magnetotelluric, resistivity layer, high temperature reservoir.
34
Paper ID : 007
Usage of Zheolite-Chitosan as Impurities Filter to Reducting Corrosion Turbine on Geothermal Plant
Ainul Yaqin Abror. H, Wildan Ichsan Sabila, Risko Pratama Yuda, Jesica Indah Oktaviana
Geophysics Sub-Department, Physics Department, Mathematics and Natural Sciences Faculty, Brawijaya University
Jalan Veteran, Malang, 65145, Jawa Timur, Indonesia
[email protected]; [email protected]
ABSTRACT
Geothermal energy is one of the renewable and eco-friendly energy. Geothermal energy in general can be identified by its
surface manifestation which are hot springs or geyser. Geothermal energy can be used as a power plant by taking hot
steam on reservoir using exploratory wells. Yet, on exploration process, hot steam still has impurity substances which can
induce turbine corrosion on geothermal plant. In order to resolve this problem, separator is in use to separating steam and
water along its impurity. But this solution is less effective because there are still impurity substances passing through after
separating process. Zeolites are microporous aluminosilicate mineral and have its uses as adsorbents. Zeolite’s usage as a
adsorbent is used to optimize impurity substances adsorbs on geothermal plant. Zeolite chitosan as one of modified
natural zeolite is used in this system, in which zeolite in the form of powder is formed to be a clumps using chitosan as an
adhesive. This type of zeolite has higher adsorption capacity than activated zeolite. Zeolite chitosan is formed into a hollow
cylindrical filter and is installed in circular on steam wash system area before the turbine, so that corrosion of the turbine
can be reduced.
Keywords: Corrosion, Pipe, Geothermal Plant, Zeolite, Chitosan
Paper ID : 008
Subsidence Causes, Effects, and Mitigations in Geothermal Field
Akta Sektiawan, Ganung Adi Prasetyo, Dida Patera Adli, Ethis Yuantoro
Institut Teknologi Bandung
Jalan Ganesa no. 10 Bandung
[email protected]
ABSTRACT
Subsidence is the motion of the ground surface as it moves down relatively. It can occur in a wide range of area. It is an
impact of production of large mass and volume of fluid from the reservoir. It doesn’t happen especially in geothermal fields
only, but also in oil and gas industry. Large fluid volume production leads to the decrease of pore pressure inside reservoir.
This decline disturbs the pressure stability and overburden pressure compress the pores. It results the drop in ground
surface. The decrease in ground surface level induces a devastating effect in the construction of some facilities, such as
building, pipeline, canal, and river. It may interrupt the balance in the ecosystems nearby. Good management and several
survey methods ( such as levelling and gravity ) will reduce the risk of subsidence and the other effects related to it. This
discussion output can be used as a guide for minimizing subsidence impact in the geothermal field in general.
35
Paper ID : 009
Identifying the Distribution of Alteration Zone Using Very Low Frequency Method in Candi Gedong Songo, Ungaran,
Semarang, Central Java
Alfianto, A.D. 1,2,*, Sari, D.P. 1, Almas, S.A. 1, Kurniawan, W.S. 1, Ambariani, S.G. 1 , Suyanto, I 1
1 Geophysics Sub-Department, Faculty of Mathematics and Sciences, Universitas Gadjah Mada
2 Geology and Geophysics Engineer PT. Pertamina EP Asset 3, Third Party Contract PT. Pranalika Energi Nusa
[email protected]
ABSTRACT
The alteration zone could be a key link and a proof to know where the ancient heat source was previously located. An
electromagnetic survey to identify and to map the lateral and vertical distribution of alteration zone had been done at
geothermal area Candi Gedong Songo, Ungaran, Central Java, from 9th – 19th of June 2014, using Very Low Frequency
(VLF) method. The survey consisted of 6 profiles, with NW – SE direction, which were located nearby the fumaroles spots
and then went down to the observed alteration zone. Each profile was 600 m long and the distance between each profile
was 20 m. The space between each measurement point of a profile was 20 m. In this study, tilt and ellipticity data with
frequency of 19.8 kHz (Japan) and 24 kHz (Panama) were used. First, the data was processed to get the cross features
anomaly between tilt and ellipticity data on the chart. Then, the derivative fraser and the relative current density
pseudosection were also made to support the cross features anomaly. The interpretation of this data was done
qualitatively using fraser and relative current density pseudosection. The result shows that the alteration zone gives high
response of conductivity compared to its surrounding area. This is supported by the anomaly cross features between tilt
and ellipticity data on the chart, also by high value of fraser and relative current density. Thus, from the result, the
alteration zone are located in meter 150 – 250 in V1 and V2 profiles, also in meter 180 – 250 in V5 and V6 profiles. This
result indicates that the ancient heat source was previously located nearby the fumaroles area and it is physically shown by
the presence of sulphuric clay mineral content at the alteration surface area.
Keywords: alteration zone, conductive zone, geothermal, VLF Method
Paper ID : 015
Geothermal Exploration Impact in Ground Water Level Case Study: Gedongsongo, Ungaran, Semarang, Jawa Tengah
A Rizqilana, H G Amirul ,F Fahreza and A Estiandari
Geological Engineering, Engineering Faculty, Universitas Diponegoro
Semarang , Central Java
[email protected]
ABSTRACT
Geoscientific investigation and research in Gunung Ungaran geothermal area had been carried out and showed that
temperature of the reservoir is about 230̊C and the power is 15 MWe/km2. If geothermal fluid to electricity conversion
factor is 15%, so that the electricity power is 2,25 MWe/km2 (Wahyudi, 2005). If the area of the prospect is about 5 km2,
so that the realistic power can be used is 11,25 MWe. Gunung Ungaran geothermal area had been proposed to be
developed as geothermal power plants and from several cases like in Wairakei, geothermal exploration give impact on
ground water level that showed grown water level drawdown until 14 meters in 50 years because of geothermal
exploration. So that, in this case there are ground water level impact comparation between Wairakei geothermal and
Gunung Ungaran Geothermal. Gunung Ungaran known as supplier of drinking water production for several companies in
Gunung Ungaran. In this paper, there are some information about Gunung Ungaran from geoscience investigation
especially in groundwater research and geothermal aspect that showed Gunung Ungaran had aquifers 30 until 90 meters
underneath surface and water discharge quantities 60 liters/second. Groundwater itself impact with geothermal because
existence of groundwater would give imperishable factor for geothermal. In contrast, exploitation of geothermal could
decrease ground water level. Decreasing ground water level would give impact on companies that use Gunung Ungaran
groundwater for drinking water. So that, there are several ways to prevent decreasing ground water level with infiltration
wells that made in some place that give effective impact for groundwater. Development in geothermal power plant should
pay attention in groundwater and preventive action have to be considere
36
Paper ID : 017
Drilling Bit Optimization In Supreme Energy Geothermal Exploration Drilling
Bambang S. Roesdyoko, Dodi A. Gauzali, Gilang Rifki A.
PT. Supreme Energy Muara Laboh
Menara Sentraya 23rd Fl, Jl. Iskandarsyah Raya No. 1A Jakarta - 12160
[email protected]; [email protected]; [email protected]
ABSTRACT
Muara Laboh prospect was interpreted, based on the pre-feasibility study, as high temperature outflow with distributed
permeability system. The prospect is located along Great Sumatran Fault (GSF), with surface manifestation indicated the
existence of a High Temperature system (>220°C) from geochemistry sampling. Exploration drilling program then carried
out by drilled total of six (6) exploratory wells to prove and delineate the Muara Laboh geothermal prospect on 2012/2013.
The drilling key performance levels are carefully identified and measured to ensure the drilling performance improve
consistently and meet the target of exploration program. One of drilling key performance is the drilling bit optimization.
This paper describes drilling bit optimization process - starting from bit data gathering and assortment, bit selection for
early wells in the program, and bit selection refinement - and also shows the bit run results and analysis. There were six (6)
exploration wells drilled in Muara Laboh and six (6) exploration wells drilled in Rantau Dedap.
Paper ID : 019
Conceptual Model Of Sorik Marapi Geothermal System Based On 3-G Data Interpretation
Birean D. Sagala, Vicky R. Chandra, Dorman P. Purba
Geoscience Department, Sorik Marapi Geothermal Power
Recapital Building 5th Floor Jalan Adityawarman Kav 55 Jakarta Selatan Indonesia
[email protected], [email protected], [email protected]
[email protected], [email protected], [email protected]
ABSTRACT
This paper discusses conceptual geothermal model of the Sorik Marapi area that is based on 3-G (Geology, Geochemistry
and Geophysics) survey data includes: geometry, fluid characteristic, temperature and geological-structural setting. This
model is aimed to predict potential power resource and for drilling exploration planning.
The survey activity includes field geological-structural mapping and collects rock, fluids samples, MT (magnetotelluric) and Gravity survey or commonly called 3-G survey. Subsequently the collected data processes through a sequences of
laboratory test activities and results are discussed and interpreted and integration all them for a final preliminary
geothermal model. Geologically, the Sorik Marapi area is formed and covered by sequences of rocks from young to old
including: young volcanic rock of the Sorik Marapi activity and old volcanic rocks unit (none related to Sorik Marapi) and
sedimentary rocks and structurally the volcanic activities strongly related with the Active Sumatran Fault Zone (SFZ).
Geophysical survey (MT and gravity) has indicated that there are four prospective areas named: Sibanggor Tonga, Roburan
Dolok, South Sampuraga and Sampuraga. Geochemistry results indicated those prospect areas are mature geothermal
system and contrast with gas-fluids characteristic from active Sorik Marapi volcano. Estimation of deep reservoir based on
gas geothermometry in Sibanggor Tonga and Roburan Dolok range from 250 oC to 325oC and for Sampuraga prospects
range from 180oC to 220oC.
Data interpretation and integration of Sorik Marapi field showed mature geothermal system are found in the low elevation
of Sibanggor Tonga, Roburan Dolok and Sampuraga and in contrast with the Sorik Marapi volcano system. A deep
exploration drilling program is needed to explore and test this model.
Keywords: geothermal system, 3-G surveys, conceptual model, data interpretation, Sorik Marapi
37
Paper ID : 022
The Development of Integrated Plant Model by Utilizing Wasted Heat in Water-dominated Geothermal Source
Cukup Mulyana*, Aswad H. Saad, M. Ridwan Hamdani, Fajar Muhammad
Department of Physics, Universitas Padjadjaran
Jl. Raya Bandung-Sumedang Km.21
[email protected]
ABSTRACT
In the geothermal power plant the brine from the single flash is commonly injected to the ground. The high temperature
and enthalpy of brine has a great potential to be used as energy source to generate electric power. Utilizing the brine and
using HYSIS software the integrated model of geothermal power plant from water dominated source has been developed.
The 265oC compressed liquid flows from the well to the well head. In the well head two phase liquid with the composition
of 20% steam and 80% are separated. The steam drives 10 bar turbine and it generates 74 MW with 77% efficiency. The
double flash is operated then the steam drives 7 bar turbine and generates 28 MW with 77% efficiency. The brine from the
double flash is used as a heat source it boils and evaporates i-pentene which is used as a working fluid of binary cycle
power plant. Two different binary cycle power plants are developed, one with recuperator, and the other without
recuperator. The power of binary cycle with recuperator is 8.3 MW, with the mass flow 412 ton/h and efficiency of 78%.
The power of binary cycle without recuperator is 18 MW, with mass flow 1230 ton/h and efficiency of 79%. This integrated
model can improve power to a level of 24.5% without drilling the new well. The use of recuperator will decrease the
amount of working fluid and will increase the brine temperature out from pre-heater. This high temperature will protect
the calcite solved in brine to be formed, so it is economically valuable because it reduces the need of organic fluid.
Key words: Integrated cycle, Dominated water, flashing, binary cycle, recuperator.
Paper ID : 023
New Challenges: Feasibility Study of New Drilling and Production Technologies for Offshore Geothermal Resources in
Indonesia
Deni Setiawan 1, Muhammad Syarif Ali Akbarsyah 2
Teknologi Bandung, Jalan Ganesha 10, Bandung, West Java, 40132, Indonesia
2 Univeristas Padjadjaran, Jalan Raya Bandung Sumedang Km. 21, Jatinangor, Jawa Barat 45363
[email protected]
1 Institut
ABSTRACT
Geothermal, as a new potential renewable source of energy, has been developing in all over the world rapidly. One of the
ways in developing geothermal energy is by increasing the number of exploration and exploitation drilling wells (Marbun et
al. 2014). The area of geothermal energy is not only covers on land, but also extends offshore. The objective of drilling a
geothermal well is to make the hole as quickly as possible subject to technology, operational, quality and safety constraints
associated with the process. The methodology used in this study are integrated offshore drilling applied for geothermal
well and geological consideration. Feasibility studies are subdivided into a number of specific tasks to provide a systematic,
sequential approach to developing an optimum design. Properties analyzed in this study was included drilling design. In the
implementation of governance for development, Sangihe Islands Regency is used as case study which divided into five
clusters. However, to get better understanding, the case simulated and equation derived in this study will represents
circulating condition in the drilling and/or production operation. In the conclusion, the result of this study is offshore
geothermal drilling can be properly applied for future exploration and potential of offshore geothermal can be exploited
when economic limit meet requirement and feasible.
38
Paper ID : 024
Identification of Surface Manifestation at Geothermal Field Using SAR Dual Orbit Data
Dinul Akbari1, Asep Saepuloh2
of Mining and Petroleum Engineering, Bandung Institute of Technology (ITB)
2Faculty of Earth Sciences and Technology, Bandung Institute of Technology (ITB)
Jl. Ganesha No.10, Bandung, West Java, Indonesia. 40132.
[email protected]
1Faculty
ABSTRACT
Wayang –Windu in West Java, Indonesia is a geothermal field located under tropical area and identified by high
precipitation, dense vegetation, and existence of geothermal surface manifestation. The high precipitation caused
convection clouds in the atmosphere. The convection clouds and dense vegetations on the equator inhibit identification of
surface manifestation using remote sensing techniques. This inhibiting factors could be reduced by microwave sensor on
satellites with Synthetic Aperture Radar (SAR) system. The dual orbit were used to observe the differentiation of object on
the surface event although high precipitation and dense vegetation cover the field. This study is aimed to identify surface
manifestation based on Geomorphologic and Structural Features using SAR dual orbits. The Linear Features Density SAR
(lifedSAR) method was applied to detect and quantify structural features at surface. The LifedSAR method utilized by SAR
dual orbit could identify the LFD related to surface manifestation zones. The surface manifestations could be detected at
Wayang and Cibolang craters correctly in the middle part of the LFD map. The surface manifestations on Wayang Windu
were located at the green portion with density 45 %. The field observations and soil measurements were used to confirm
the correctness of the lifedSAR result, especially at surface manifestations and crater rims.
Keywords: SAR dual orbit, LifedSAR, surface manifestations, Wayang-Windu geothermal field.
Paper ID : 025
The Functional Shift Of Old Central Sumatra Basin as Hydrocarbon Wells To Non Volcanic Geothermal Field:
Optimization Injection Wells and Production Wells As An Effort To Create National Energy Sovereignty
Djati Wicaksono Sadewo1, Nicholas Bastian1, Ridwan Chandra1, Sekar Indah Tri Kusuma1
1 Prodi S1 Teknik Geologi Universitas Diponegoro, Fak. Teknik Universitas Diponegoro
Jala. Prof.Soedarto, S.H Tembalang-Semarang
[email protected]
ABSTRACT
Indonesia has 40% of world's geothermal resources potentially 28.617 MW (Indonesia Energy Outlook 2014). Beside
volcanic geothermal, there are another untapped geothermal such as hot dry rock and hot sedimentary aquifer (Dudi
Hermawan et al,2011). One of non-volcanic geothermal field could potentially be a source is Central Sumatra basin.
Central Sumatra basin has basement in form of hot dry rock (granite), with thermal gradient of 67.5°C/Km (Carvalho et al,
1978) and 3 km depth (Ikhwan Dwi, 2001). Central Sumatra basin which is currently operated as oil and gas field, has
untapped non-volcanic geothermal potential which could be exploited by optimizing the injection wells and production
wells with enhanced geothermal systems technology. Optimization in injection wells is necessary due to high costs in
fracturing and could be addressed with PAA-CO2 fracturing fluid. The high number of heat loss in production wells also
could be overcomed by refractories mineral which could maintain the temperature of steam in production pipe. This
optimization method is expected to limit production costs and increase production of geothermal steam. Additionally, if
oil and gas reserves in Central Sumatra Basin is not longer economical, this hot dry rock utilization will be a solution to
maintain economic value of the basin.
39
Paper ID : 031
The Potential and Development of Way Ratai Geothermal Prospect Area as A Solutions of Electricity Crisis at Lampung
Province
Evi Muharoroh
Geophysical Engineering Department, Faculty of Engineering, University of Lampung
Jln. Prof. Dr. Soemantri Brojonegoro No. 1 Bandar Lampung
[email protected]
ABSTRACT
Indonesia lies at the confluence of three active tectonic plates, the Eurasian, Indo-Australian and Pacific, which part of the
ring of fire. This plate interaction results in a series of active volcanoes from the western Sumatera to the southern Java.
With this geologic setting, Indonesia has a significant estimated geothermal potential of about 27.5 GWe, 40% of the
geothermal potential in the world. Lampung province located at the southern tip of Sumatera, has an estimated
geothermal potential of approximately 2710 MWe. One geothermal prospect in the province, Way Ratai geothermal
prospect area alone has a potential of 300 MWe. Geothermal energy is stored in the subsurface rocks and the fluid that
contained therein. Geothermal energy in Indonesia is generally located near of a volcano and usually used for agricultural
drying, home heating, and electrical generation. Geologically, Way Ratai area is located at the confluence zone between
the Eurasian Plate and the Indo-Australian Plate which forms the Menanga Fault, one of the Sumateran Fault segments. It
has been postulated that the Menanga Fault has given rise to the Ratai primordial Volcano. Based on geological surveys,
there are several areas of geothermal manifestations around the Ratai Volcano which include steaming ground, rock
alteration, and five hot springs with temperature 85-98°C. geothermometry of the fluids from these springs indicate a
reservoir temperature of 200-240°C. These data suggest that Way Ratai geothermal prospect area has a good potential for
geothermal electrical generation. Geothermal development of this prospect should contribute to solving the energy crisis
in Lampung Province.
Keywords : geothermal, Way Ratai, energy crisis
Paper ID : 032
Integration of MT-CSAMT and Resistivity Log for Determining Geothermal Reservoir Model Based on Convection Heat
Energy Transfer
Faid Muhlis [1], Risca Listyaningrum [1]
Geophysical Engineering Department, University of Pembangunan Nasional “Veteran” Yogyakarta
SWK Street 104 Condongcatur Yogyakarta
[email protected], [email protected]
ABSTRACT
When the fluid is heated, the density became lesser than the fluid nearby. So it rises up through the cooler, dense water.
At the top, the water cools and its density increases then causes it to sink back down to the bottom. This movement occurs
until heats all of the fluid. The heat energy transfer within the fluid is called by convection. In the reality this case also
happening in geothermal system due to fluid (water) in the reservoir. So by using Magnetotellurics - Controlled Source
Audio Frequency Magnetotellurics and resistivity log, can be observed heat changes in geothermal areas based on the
value of resistivity. So it can be made a model of the geothermal system by integrating these methods. In this case the
model is reservoir will show easier response to observed than the response of the other geothermal system models. The
resistivity response will indicate a relatively flat response when appropriate in the region of the reservoir because
convection heat energy transfer occurs evenly.
Keywords: MT, CSAMT, Resistivity Log, Reservoir, Convection
40
Paper ID : 033
Identifying Non-Volcanic Geothermal Potential in Amohola, Southeast Sulawesi Province, By Applying Fault and Fracture
Density (FFD) Method
FajarMulyana, Gian E. Tsani, Kiddy Nahli, M. Aulia Alwan, M. Hilman Darojat and Rezky N. Hendrawan
Faculty of Geological Engineering, Padjadjaran University, Bandung, West Java, Indonesia
Jl. Raya Jatinangor, Km. 21. Phone: (+62-22 7796545)
[email protected]
ABSTRACT
Indonesia has numerous volcanic areas that lead to a significant geothermal potential. The geothermal potential could be
produced by volcanic and non-volcanic processes. To date, geothermal possibilities by volcanic process are the most
commonly known and explored in several areas in Indonesia, whereas, geothermal potential by non-volcanic process is
rarer. Therefore, Indonesia is likely has a promising non-volcanic geothermal also.
Non-volcanic geothermal systems could be identified by using Fault and Fracture Density (FFD) method, lineaments
analysis from SRTM and topography data, as well as using earlier research models by previous researchers. By using those
methods, the existing of fractures and possibility level of area that being recharge and discharge zones for geothermal
might be predicted. Thus, the result could be the next target of exploration.
This paper describes the application of those methods for the Amohola region and surrounding areas in Southeast Sulawesi
Province. In general, the study area has complex geological characteristics. Consequently, the methods could be applied to
identifying the presence of non-volcanic geothermal system in this study area.
Keywords: Fault and Fracture Density (FFD), Lineament, Non-volcanic geothermal system, Amohola, Southeast Sulawesi.
Paper ID : 037
Volcanolostratigraphic Study in Constructing Volcano Chronology and its Implication for Geothermal Resource
Estimation; Case Study Mount Sawal, West Java
Fikri Adam Dermawan, Hibban Hamka, Rully Tri Abdul Malik
Magister Program of Geothermal Engineering, Faculty of Mining and Petroleum Engineering, Bandung Institute of
Technology (ITB), Jl. Ganesha No. 10, Bandung, Indonesia 40132
[email protected]
ABSTRACT
One of the researches that should be done before carrying out a preliminary survey on the geothermal exploration with a
volcanic system or volcanic-hydrothermal is by studying the volcanic stratigraphy. Determining the center of the volcanic
eruption and its distribution based on the volcanostratigraphic study will be very helpful in a direct mapping that will be
implemented, given that the type and characteristics of volcanic rocks are nearly the same between one source of the
eruption and the other. On this case, volcanostratigraphic study had been done on Mount Sawal, where a topographic map
with a scale of 1: 100,000 is used to determine the center of eruption of each crowns, while another map with a scale of 1:
50,000 is used to identify the distribution of the monogenetic (Hummock) eruption products and crowns border in detail. It
is found approximately three crowns, which are Langlayang, Sawal big crown, Pamokolan, and the Cikucang Hummock that
is located on the southern edge of the Langlayang crater. These Hummock and Crowns collection will be grouped into Tasik
Bregade. Based on the volcanostratigraphic analysis, DEM, and geology, the chronology of how Tasik Bregade is formed is
originally from the Langlayang, Sawal big Crowns, and Pamokolan. Tasik Bregade is classified into sub-mature potential
geothermal system, from the analysis results, the potential magnitude of the energy contained in the magma is at 7.4 to
12, 4 MW for 30 years, but further research needs to be done because of the detailed geological and other support data
that are still lacking.
Keywords: volcanic stratigraphy, topographic map, chronology, geothermal system.
41
Paper ID : 038
Geochemical Study Of Ampalas Geothermal Area, Mamuju District, West Sulawesi Province
Fithriyani FAUZIYYAH1, Teguh Rahat PRABOWO2, Muhammad Ghassan Jazmi SHALIHIN2, Dede Iim SETIAWAN3, Anna
YUSHANTARTI3
1 Engineering Hydrogeology, Faculty of Earth Science and Technology, ITB, Indonesia
2 Engineering Geology, Faculty of Geology, Universitas Padjadjaran, Indonesia
3 Pusat Sumber Daya Geologi, Ministry of Energy and Mineral Resource, Indonesia
[email protected]
ABSTRACT
Ampallas is one of the areas with geothermal potential which located in Mamuju district, near from the capital city of West
Sulawesi. This research was carried out to understand the characteristic of this geothermal field based on chemistry of the
surface manifestation, including fluid characteristic and soil anomaly.
Geothermal research in Ampallas area focused on 4 hot springs; Ampallas, Batupane, Karema, and Gantungan. With
average temperature around 34 – 670C. Ampallas hot spring water type is chloride – bicarbonate, which means it came
from the reservoir while the others are bicarbonate. Ampallas fluid plotted in partial equilibrium zone and the others
plotted in immature water zone. It means the Ampallas hot springs mixed with meteoric water right after reached the
equilibrium state. It is also concluded that Ampallas hot springs came from the same reservoir with Batupane, but not
Gantungan and Karema hot springs.
The speculative resource potential of Ampallas geothermal system is estimated around 30 MWe. But if detailed
geophysical method was applied the result could be more accurate.
Paper ID : 039
Identification of Geothermal Fluid Paths at Ground Surface on Segment Tracing Algorithm (STA) of the ALOS PALSAR
Data
HAERUDDIN a, Asep SAEPULOH b, Mohamad Nur HERIAWAN a
a Faculty of Mining and Petroleum Engineering, ITB
b Faculty of Earth Sciences and Technology, ITB
Jl. Ganesha 10 Bandung 40132, Indonesia
[email protected]
ABSTRACT
Indonesia has potency 40% of whole geothermal energy potential in the world. An area with the potential geothermal
energy in Indonesia is Wayang Windu located at West Java Province. Thus, the comprehensive understanding about the
geothermal system in this area is indispensable for continuing the development. A geothermal system generally associated
with joints or fractures and served as the paths for the geothermal fluid migrating to the surface. The fluid paths are
identified by the existence of surface manifestations such as fumaroles, solfatara and the presence of alteration minerals.
Therefore the analyses of geological structures are indispensable for identifying the geothermal potential. Fractures or
joints in the form of geological structures are associated with the linear features in the satellite images. A method to
determine the linear features is Segment Tracing Algorithm (STA). In this study, we used satellite image data of ALOS
PALSAR in Ascending and Descending orbit modes. The linear features obtained by satellite images could be validated to
the results of field observations. Thus the final interpretation is expected corresponding to the actual conditions in the
field. Based on the result of study, general direction of extracted lineaments were known in Northwest-Southeast, where
this direction is consistent with the general direction of faults system in field. Thus extracted lineament by using Segment
Tracing Algorithm (STA) for ALOS PALSAR data was very helpful in observing the lineament phenomena which was related
to the identified geothermal fluid path in study area.
Keywords: Segment Tracing Algorithm (STA), ALOS PALSAR, geothermal, extracted lineaments, Wayang Windu.
42
Paper ID : 041
Assessing The Possibility Of Enhanced Geothermal System In Western Indonesia
Rezki Naufan Hendrawan1, Windi Anarta Draniswari1
Engineering, Master Program, Bandung Institute of Technology
[email protected]
1Geological
ABSTRACT
Enhanced Geothermal System (EGS) is one of geothermal system where abnormally hot masses of low permeability rocks
are found at depth. Most of EGS are related to thick and deep sedimentary basin with plutons. EGS focused on drilling at
hot crystalline rock and create fractured reservoirs.
Indonesia has a complex tectonic setting. There were more than 86 basins in Indonesia. Most of sedimentary basins in
Indonesia were tectonically stressed. Moreover, the tectonic setting which is generally a part of the Active Continental
Margin also allows the formation of plutons that can be act as hot dry rock. Several hot springs or other geothermal
manifestation were found in several areas within the basin and its surrounding area. This study compares structural
controls and models in different tectonic setting of main basin in Western Indonesia to get the most suitable potential
reservoir for EGS. The characteristic of the South Sumatra Basin, North Sumatra Basin, Tarakan Basin, West Java Basin and
East Java Basin were evaluated and compared based on its geology and geophysics characteristic. As the result, South
Sumatra Basin Basin is the first rank for EGS suitability in Western Indonesia.
Keywords : EGS, potential, Western Indonesia
Paper ID : 042
Numerical Simulation for Natural State of Two-Phase Liquid Dominated Geothermal Reservoir with Steam Cap Above
Brine Reservoir
Heru Berian Pratama, Nenny Miryani Saptadji
Geothermal Master Degree Program, Institut Teknologi Bandung.
Jalan Ganesha No.10, Bandung, Indonesia
[email protected]
ABSTRACT
Hydrothermal reservoir which liquid-dominated hydrothermal reservoir is a type of geothermal reservoir that most widely
used for power plant. The exploitation of mass and heat from the geothermal fluid will decrease the pressure in the
reservoir over time. Therefore the pressure drop in the reservoir will have an impact on the formation of boiling zones or
boiling will increase. The impacts are an increase in the fraction of steam, dryness, in the reservoir and with good vertical
permeability will form a steam cap underlying the brine reservoir.
The two-phase liquid dominated reservoir is sensitive to the porosity and difficult to assign average properties of the entire
reservoir when there is boiling zone in some area of the reservoir. These paper showed successful development of twophase liquid dominated geothermal reservoir and discussed the formation of steam cap above brine reservoir through
numerical simulation for state natural conditions. The natural state modeling in steam cap shows a match with the
conceptual model of the vapor-dominated developed by White (1971) and enhanced by D’Amore and Truesdell (1979).
These paper also proofed the presence of transition zone, boiling zone, between steam cap and brine reservoir.
Keywords: Numerical Simulation, Two-phase Liquid-Dominated Reservoir, Steam Cap.
43
Paper ID : 043
Geothermal System of Mount Ungaran, Central Java, Indonesia: Characterization, Conceptual Model, and Potential
Ibnu Dwi Bandono Wahyudi
PT. Patra Nusa Data
Taman Tekno BSD Sector XI, Blok G2/1, Serpong, South Tangerang
[email protected]
ABSTRACT
Mount ungaran is one of geothermal potential in Central Java and contributes ± 100 MWe. The purposes of this paper are
to identify geochemical characterization, calculate the reservoir temperature and understand the geothermal system of
Ungaran.
Manifestations especially hot spring are namely Gonoharjo, Medini, Kaliulo, Diwak, Derekan, Kendalisodo, and
Gedongsongo. One sample from Gedongsongo and one sample from Kaliulo have high concentration of chloride (Cl). Two
samples from Gedongsongo have high concentration of sulfate (SO4). Therefore, samples from Kaliulo, Diwak, Derekan,
Gonoharjo, Medini, Kendalisodo have high concentration of bicarbonate (HCO3). Detail concentration is shown in table 1.
Regionally, the concentrations of Cl-SO4-HCO3 in Mount Ungaran are divided into three zones, deep Cl waters, dilute Cl –
HCO3 waters and steam heated waters. Whereas, the concentration of Na-K-Mg in Mount Ungaran is belong to immature
waters zone and partial equilibrium zone.
The reservoir temperature in Gedongsongo area is ranging up from 210.25oC to 328.68oC by Na-K-Ca, 177.77oC to
274.26oC by Si (silica), 334.92oC to 553.20oC by Na-K, 4.85oC to 23.66oC by K-Mg & Li/Mg, 25.34oC to 151.92oC by Na/Li,
and 177.77oC to 231.338oC by gas geothermometer. Based on the calculation, geothermal potential in Ungaran is ranging
up from 34.4 MWe to 103.1 MWe with median 68.7 MWe.
Keywords: Ungaran, Manifestations, Thermal fluid, Reservoir Temperature, Conceptual Model
Paper ID : 044
Decline Curve Analysis in Liquid-Dominated Geothermal Reservoir for Optimizing and Forecasting in Production
Iki Hidayat
Jl. Ganeca No.10, Jawa Barat 40132
[email protected]
ABSTRACT
Electrical power project in geothermal field has long time range about 30 years. The power electricity must be maintained
at certain value along the time range. But, geothermal field has natural characteristic for declining in production to time.
Determining decline curve model of steam production is important thing for forecasting production decline in the future.
This study was developed using decline curve by production data along 3 years liquid-dominated geothermal reservoir in
Ulubelu field. Decline curve in geothermal field based on decline curve in petroleum industry. The decline curve was
correlated by reservoir management in geothermal. The purposes of this study to get best match model decline curve and
forecasting production in the future.
Based on decline curve analysis by production data in Ulubelu field, the result model decline curve is exponential model.
From the model, we can get the value of decline rate in the field is 9.4 %/year. Then, the formula of forecasting steam
flow was equal 𝒒 = 𝒒𝒊 𝒆−𝟎.𝟎𝟎𝟕𝟖𝟗𝟗𝒕 . By using separated system cycle in Ulubelu field, the minimal steam flowrate towards
turbine was 502018.4 ton/month. Based on formula of forecasting production and minimal steam flowrate, we can get the
time make up wells to maintain steam supply for stability in generator power capacity.
Keywords : decline production, curve, liquid- dominated
44
Paper ID : 048
Characterizing Geothermal Surface Manifestation Based on Multivariate Geostatistics of Ground Measurement Data
Ishaq1, Mohamad Nur Heriawan1, Asep Saepuloh2
of Mining and Petroleum Engineering, Bandung Institute of Technology (ITB), Jl. Ganesha No. 10, Bandung, West
Java, Indonesia 40132.
2Faculty of Earth Sciences and Technology, Bandung Institute of Technology (ITB), Jl. Ganesha No. 10, Bandung, West Java,
Indonesia 40132
[email protected]
1Faculty
ABSTRACT
Mt. Wayang Windu is one of geothermal field located in West Java, Indonesia. The characterization of steam spots at
surface manifestation zones based on the soil physical measurements of the area is presented in this study. The
multivariate geostatistical methods incorporating the soil physical parameter data were used to characterize the zonation
of geothermal surface manifestations. The purpose of this study is to evaluate the performance of spatial methods of
multivariate geostatistics using Cokriging to characterize the physical properties of geothermal surface manifestations at
Mt. Wayang Windu. The Cokriging method was selected because this method is favorable when the secondary variables
has more number than the primary variables. There are four soil physical parameters were used as the basis of Cokriging
method, i.e. Electrical Conductivity, Susceptibility, pH, and Temperature. The parameters were measured directly at and
around geothermal surface manifestations including hot springs, fumaroles, and craters. Each location of surface
manifestations was measured as 30 points with 30 m grids. The measurement results were analyzed by descriptive
statistics to know at the nature of data. The relationship among variables was analyzed using scatterplot to obtain the
linear correlation among variables. The higher correlation coefficient among variables, the estimation results is expected to
have better Linear Model Coregionalization (LMC). LCM was use to analyze the spatial correlation of each variable based on
their variogram and cross-variogram. To evaluate the performance of multivariate geostatistical using Cokriging method, a
Root Mean Square Error (RMSE) was performed. Estimation result using Cokriging method is good for characterizing the
surface physics parameters of radar images data.
Paper ID : 050
Literature Review of Radar Remote Sensing Combined With Continuous GPS Measurements For The Monitoring Of
Deformations Of Geothermal Fields (Jane Mbogo and Josephat Kebu-Kenya Electricity Generating Company)
Jane Mbogo, Josephat Kebu
Kenya Electricity Generating Company Ltd.
P.O BOX 785, Naivasha, Kenya
ABSTRACT
Electricity generation from geothermal sources is associated with geothermal fluid extraction and re-injection, resulting in
surface changes/displacements horizontally and vertically (uplift or sinking) (Eneva, 2009). Besides, previous geodetic
monitoring of geothermal production sites have shown large subsidence and horizontal displacement attributed to thermal
contraction, pressure reduction in the reservoir, and/or changes in the local stress field (Heimlich, Masson, & Gourmelen,
2013). Conventional surveying methods employed to measure the deformations of structures with small and slow
displacements have often provided infrequent though precise estimates of these deformations. With the development of
high precision GPS methods and Remote Sensing, an alternative method for monitoring structural deformations is
available. Continuous GPS measurements technique with its higher temporal resolution is complemented with RADAR
remote sensing so as to cover larger areas spatially. Citing case studies, this paper fronts the application of RADAR Remote
Sensing complimented with continuous GPS measurements as an ideal way of monitoring deformations of geothermal
fields for better geothermal field management. A similar proposition has been forwarded for approval in the management
of Olkaria Geothermal Field which houses the largest geothermal power plant in Africa.
45
Paper ID : 051
Repeat Absolute and Relative Gravity Measurements for Geothermal Reservoir Monitoring in Ogiri Geothermal Field,
Southern Kyushu, Japan
Jun Nishijima, Chika Umeda, Yasuhiro Fujimitsu, Jun-ichi Takayama, Naoto Hiraga, and Satoru Higuchi
Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University
744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
[email protected]
ABSTRACT
Repeat hybrid microgravity measurements were conducted around the Ogiri Geothermal Field on the western slope of
Kirishima volcano, southern Kyushu, Japan. This study was undertaken to detect the short-term gravity change caused by
the temporary shutdown of production and reinjection wells for regular maintenance in 2011 and 2013. Repeat
microgravity measurements were taken using an A-10 absolute gravimeter (Micro-g LaCoste) and CG-5 gravimeter
(Scintrex) before and after regular maintenance. Both instruments had an accuracy of 10 µgal. The gravity stations were
established at 27 stations (two stations for absolute measurements and 25 stations for relative measurements). After
removal of noise effects (e.g., tidal movement, precipitation, shallow groundwater level changes), the residual gravity
changes were subdivided into five types of response. We detected a gravity decrease (up to 20 µgal) in the reinjection area
and a gravity increase (up to 30 µgal) in the production area 1 month after the temporary shutdown. Most of the gravity
stations recovered after the maintenance. The temporal density changes in the geothermal reservoir were estimated
based on these gravity changes.
Paper ID : 052
Volcanological Approaching for Evaluation of Geothermal Potential in Galunggung Mountain
Qodri Syahrur Ramadhan, Akhmad Kunio Pratopo, Juni Yesy Sianipar
Magister Program of Geothermal Engineering, Faculty of Mining and Petroleum Engineering, Bandung Institute of
Technology (ITB), Jl. Ganesha No. 10, Bandung, Indonesia 40132
[email protected]
ABSTRACT
Geothermal system in Indonesia is associated with volcanoes. There are more than 200 volcanoes that
located in Sumatra, Java and Eastern of Indonesia. Studying about the characteristic of volcano, volcanostratigraphy, is one
of methods used in early stage for the exploration of volcanic geothermal system. The method is identifying the
stratigraphy of volcano from topographic map on Tasikmalaya sheet 1:100.000 on scale, 1:50.000 on scale and also
geological map. The schematic flowchart of the evaluation of geothermal exploration is used to interpreted and evaluated
geothermal potential in volcanic regions. Volcanostratigraphy study has been done on Mt. Galunggung and Mt. Talaga
Bodas, West Java, Indonesia. Based on the interpretation of topographic map and analysis of dimension, rock composition,
age and stress regime, we conclude that both Mt. Galunggung and Mt. Talaga Bodas have a geothermal resource potential
that deserves further investigations.
Keywords: volcanostratigraphy, topographic map, geothermal system.
46
Paper ID : 054
Numerical Model of Unsteady Two-phase Flow for Geothermal Production Well
Yasunari Katayama, Ryuichi Itoi, Toshiaki Tanaka
Department of Earth Resources Engineering, Kyushu University
Fukuoka, Japan
[email protected]
ABSTRACT
In the course of geothermal reservoir exploitation, production wells are sometimes completed with multi-feed zones to
enhance its productivity. However, oscillation in wellhead pressure was observed in such production wells with multi-feed
zone. This pressure instability affects stable steam production, which in the worst case may lead to the stop of steam
production of the well.
In this study, we developed a coupled model of transient wellbore and reservoir flows with two feed zones. Then,
numerical simulations were conducted to evaluate the effects of reservoir parameters such as reservoir pressure,
temperature and permeability on the flow characteristics of well with multi-feed zones. The simulation results showed that
cyclic fluid production at the wellhead is caused by the changes in the depth of flash point in the well under the specific
reservoir conditions.
Paper ID : 061
Characteristic of Geothermal Fluid At East Manggarai, Flores, East Nusa Tenggara
Mochamad Iqbal1, Niniek Rina Herdianita2, Dikdik Risdianto3
1Geological Engineering, Bandung Institute of Technology
2Applied Geology Research Group, Bandung Institute of Technology
3Center for Geological Resources, Bandung
[email protected]
ABSTRACT
The research area is located in East Manggarai and its surrounding area, Flores. The geomorphology of the study area
consists of volcanic cones, volcanic slopes, lava dome and undulating hills. The geology of the study area is dominated by
Quaternary volcanic products, i.e. lava and pyroclastic rocks. The structural geology developed in the area is relatively
trending north-south and northeast-southwest.
In the study area there are two geothermal systems, i.e. Mapos geothermal system which is associated with Anak Ranakah
volcano and Rana Masak geothermal systems which is associated with Watuweri volcano. The difference within these
systems is shown by the relative content of conservative elements of Cl, Li and B. Geothermal surface manifestations in
Mapos include 4 hot springs having temperatures of 34,3-51,4oC and bicarbonate and sulphate-bicarbonate waters; the
discharge area in Rana Masak consist of 3 hot springs with temperatures of 38-46,6oC and chloride and chloridebicarbonate water. Stable isotopes 18O and D analyses showed that the geothermal fluid derived from meteoric water.
The Mapos geothermal system is a high temperature system having reservoir temperature of 250-270ºC with natural heat
loss of 230 kW. The Rana Masak geothermal system is a low temperature system having reservoir temperature of 120140ºC with natural heat loss of 120 kW.
Keywords: Anak Ranakah, East Manggarai, Flores, geochemistry, geothermal, Watuweri.
47
Paper ID : 062
Performance Analysis of Mineral Mapping Method to Delineate Mineralization Zones Under Tropical Region
Muhamad Hardin Wakila1, Asep Saepuloh2, Mohamad Nur Heriawan1
of Mining and Petroleum Engineering, Bandung Institute of Technology (ITB), Jl. Ganesha No. 10, Bandung, West
Java, Indonesia 40132
2Faculty of Earth Sciences and Technology, Bandung Institute of Technology (ITB), Jl. Ganesha No. 10, Bandung, West Java,
Indonesia 40132
[email protected]
1Faculty
ABSTRACT
Geothermal explorations are currently being intensely conducted at several areas in Indonesia; one of them is Wayang
Windu area, West Java. Mineral mapping is very important method in geothermal explorations to determine the
distribution of minerals which indicate the surface manifestations of geothermal potential in the Wayang Windu. Because
the region of Wayang Windu is very wide for direct explorations and objects (minerals) were observed has high
homogeneity, it is necessary to mapping with precise and accurate method to determine the distribution of these minerals.
This study aims to determine the most precise and accurate methods for minerals mapping on the surface for geothermal
manifestations. Field measurements are performed to validate the data or results of the mapping from several methods.
The field data that will be targeted include: soil, rock and the fluid samples. The method were examined in this study are:
1) Minimum Noise Fraction (MNF), the linear transformation method which is useful to eliminate the correlation between
the band and to reduce the noise in the data until a certain extent, 2) Pixel Purity Index (PPI), a method which is designed
to find the most extreme spectrum pixel, and the pixel characteristic which tends to accordance with end-members mix, 3)
Spectral Angle Mapper (SAM), a technique of classifying objects in an area (image) by measuring the spectral similarity
between an unknown object with spectral reference (known) in n-dimension. The output of this research was mineral
mapping from each method; they are MNF, PPI, and SAM, which were compared to the ground truth. The result of
research showed that SAM method is the most appropriate and accurate for mineral mapping related geothermal
manifestations.
Keywords: mineral mapping, geothermal manifestations, Minimum Noise Fraction, Pixel Purity Index, Spectral Angle
Mapper
Paper ID : 063
Characteristic of Geothermal Reservoir Based on Analysis of Surface Manifestation, Fluid Geochemical and Rock
Alteration; Case Study of Ungaran Volcano Geothermal Area, Central Java, Indonesia
Muhammad Afkarul Haq, Farchan Nauval, Nashir Idzharul Huda
Geological Engineering of Diponegoro University
Jl. Prof. Soedarto, Tembalang, Semarang, Indonesia
[email protected]
ABSTRACT
Geothermal prospect area of Ungaran Volcano is located in Central Java Province, Indonesia. This area is one of the most
eastern North Serayu mountain range. Gedongsongo, Nglimut, Kendalisodo and Diwak constitute the area by surface
manifestation that consist of hot springs, warm ground, warm pool, silica sinter, fumaroles and altered rock. The purpose
of this research is to find out the characteristic of geothermal reservoir which could be used as one of the parameter and
basic recommendation in planning stage of Ungaran geothermal prospect.
The research undertaken by identify structural control of Ungaran geothermal system, analysis of fluid geochemical to find
out the temperature and characteristic of fluid phase in reservoir, fluid origin, and also corrosivity and fluid tendency to
form solid precipitate. Besides, the research will also interprete about rock alteration on geothermal area.
Some of geothermal manifestation in Gedongsongo, Nglimut, Kendalisodo and Diwak could exist on surface caused by
major fault control on each area. The hot springs (e.g., Gedongsongo and Nglimut,) are well correlated with high horizontal
gradient anomalies that are interpreted as boundaries or faults. Then field observation on Kendalisodo geothermal area
shows andesitic intrusion and altered rock on outcrop. This phenomenon could be used as an indication that geothermal
system of Kendalisodo area formed by the intrusion itself. Based on analysis of geothermometer and chemical content of
fluid, then interpreted that counted average of reservoir temperature could classified into high enthalpy geothermal
system, and the characteristic of reservoir’s phase is water dominated. Silica content on fluid phase reservoir is probable to
form silica scaling in separated water pipeline and reinjection wells.
Keywords: geothermometer, alteration, scaling
48
Paper ID : 065
A Comparison Analysis between Russel James Equation and Hiriart Equation in Horizontal Discharge Lip Pressure for
Production Test at Geothermal Well Using Statistical Method
Muhammad Nizami
Petroleum Engineering Study Program, Institut Teknologi Bandung
Jl. Ganesha 10, Bandung, Indonesia
[email protected]
ABSTRACT
Production test is one of very crucial activity in development process of geothermal field. This activity is run after drilling
and completion process of well were done. Production test must be run to determine the condition of the well, reservoir
characteristic and production capacity of the well and also clean drill cuttings or mud drilling from the well. Production test
data should be processed carefully to get more accurate result and approach the actual condition of the well. Currently,
there are two methods in production test: lip pressure and separator method. Lip pressure can be performed in an upright
(vertical discharge) or in a flat configuration (horizontal discharge). Russel James Equation is usually used when calculating
several parameters at lip pressure method. This equation connecting mass flow rate, enthalpy, lip pipe cross-sectional area
and lip pressure. Hiriart equation is more simple than Russel James Equation because it only requires pressure and lip pipe
diameter as the variables. Hiriart equation neglects the fluid enthalpy parameter, so that the accuracy level is lower than
Russel James Equation. This equation is only applied in vapor-dominated geothermal wells. If this equation will be applied
in two phase well, it need to be corrected with additional certain parameter. This paper presents a comparison between
Russel James equation and Hiriart equation using statistical method. The comparison is conducted by calculating the error
value and the standard deviation at 95% confidence level that obtained by the normal distribution curve. To validate result
from both equation, it must be generated by calculation using available field production test data. When the result is
calculated by Hiriart equation inside acceptance range, this equation can be used to replace Russel James equation
because it is more simple equation and easy to use for calculation in production test analysis of geothermal well.
Keywords: production test, Russel James equation, Hiriart equation, statistical method
Paper ID : 066
Mathematical Modelling of Silica Scaling Deposition in Geothermal Wells
Muhammad Nizami1, Sutopo2
Engineering Study Program, Institut Teknologi Bandung
2Geothermal Engineering Study Program, Institut Teknologi Bandung
Jl. Ganesha 10, Bandung, Indonesia
[email protected] , [email protected]
1Petroleum
ABSTRACT
Silica scaling is widely encountered in geothermal wells which produce two-phase geothermal fluid. Silica scaling can be
formed due to chemical reacting by mixing a geothermal fluid with other geothermal fluid in different compositions, or also
can be caused by changes in fluid properties due to changes pressure and temperature. One of method to overcome silica
scaling which is occurred around geothermal well is by workover operation. Modelling of silica deposition in porous
medium has been modeled in previously. However, the growth of silica scaling deposition in geothermal wells has never
been modeled. Modelling of silica deposition through geothermal is important aspects to determine depth of silica scaling
growth and best placing for workover device to clean silica scaling. This study is attempted to develop mathematical
models for predicting silica scaling through geothermal wells. The mathematical model is developed by integrating the
solubility-temperature correlation and two-phase pressure drop coupled heat loss correlation in a production well. The
coupled model of two-phase pressure drop and heat loss calculation which is used in this paper is Hasan-Kabir correlation.
This modelling is divided into two categories: single and two phase fluid model. Modelling of silica deposition is
constrained in temperature distribution effect through geothermal wells by solubility correlation for silica. The results of
this study are visualizing the growth of silica scaling thickness through geothermal wells in each segment of depth.
Sensitivity analysis is applied in several parameters, such as: bottom-hole pressure, temperature, and silica concentrations.
Temperature is most impact factor for silica scaling through geothermal wellbore and depth of flash point. In flash point,
silica scaling thickness has reached maximum because reducing of mole in liquid.
Keywords: mathematical modelling, silica scaling, silica solubility, well-bore modelling
49
Paper ID : 067
Feasibility of Geothermal Energy Extraction From Non-Activated Petroleum Wells In Arun Field
Muhammad Syarifudin, Kalvin Maurice, Franky Octavius
Jalan Ganesha No.10, Bandung, Indonesia
[email protected]
ABSTRACT
Geothermal energy is very promising renewable energy. Theoretically, it can be harvested from oil/gas wells which satisfy
several criteria. Geothermal may provides a stable energy source that has low impact on the environment, if it is properly
managed. The big obstacle to develop geothermal is frequently came from the economical viewpoint which mostly
contributed by the drilling cost. However, it can be tackled by converting the existing decommissioned petroleum well for
geothermal purposes.
In Arun Field, Aceh, there are 188 wells and 62% of them are inactive (2013). Theoretically, there is a possibility to convert
ex-petroleum well into geothermal well. However, outlet water temperature from this conversion setup will not as
significant as the temperature that come out from the conventional geothermal well, it will only range from 60 to 180 oC
depending on several key parameters such as the values of ground temperature, geothermal gradient in current location,
the flow inside of the tubes, and type of the tubes (the effect from these parameters are studied). It will just be considered
as low to medium temperature, according to Hochstein geothermal well classification.
To do the well conversion, pipes inside the well that have been used to lift the oil/gas and replacing them with a curly long
coil tubing which act as a heat exchanger that convert the cold water from the surface to be indirectly heated by the hot
rock at the bottom of the well in a closed loop system. In order to make power production, the binary cycle system is used
so that the low to medium temperature fluid is able generate electricity by using organic fluid.
Based on this study, producing geothermal energy for direct use and electricity generation in Arun Field is technically
possible. In this study case, we conclude that 2900 kW of electricity can be generated. While for direct use, a lot of local
industries in Northern Sumatera may get the benefit from this innovation.
Keywords: Geothermal Energy · Combined Cycle · Decommissioned Well · Arun Field
Paper ID : 070
Optimal Geothermal Well Cementing A Case of Olkaria Geothermal Field
Nahashon Karanja Nzioka,
KenGen
Olkaria Geothermal projects
P.O Box 785-20117
Naivasha
[email protected]
ABSTRACT
Olkaria Geothermal field poses major challenges in cementing of well casings due to the fact that the area is highly
permeable, the down hole temperature and pressure is very high and the cement sheath between the annular and casing
is prone to strength retrogression due to continuous exposure to high temperatures which are in excess of 250°C. This
paper documents our experiences in geothermal well cementing from cement design to job execution and lessons learnt
from these experiences. Attempts to fight these challenges have been met with varying levels of success so suggested
improvements to the current cement design and practices is also presented.
Keywords: Thickening time, ECD (Equivalent Circulating Density), Bearden Consistency Bc, BHCT (Bottom Hole Circulating
Temperature), WOC (Wait On cement), Lead Cement, Tail cement
50
Paper ID : 072
The Concept of Steam Field and Geothermal Power Plant (PLTP) Development Plan, Case Study at Mount Rajabasa
Nanda Hanyfa Maulida, Suharno
Geophysical Engineering, Engineering Faculty - University of Lampung
Jl. Soemantri Brojonegoro No. 1 Bandarlampung
[email protected]
ABSTRACT
Energy crisis in Indonesia forces the government to build some new geothermal power plants in various potential areas as
soon as possible, including Lampung Province that has a great geothermal potency. To develop geothermal power plant, it
takes perfect plans to get maximum production result from the exploration. Therefore, to offer some point of view about
developing power plant, we make a basic development concept in Rajabasa geothermal field. The potency of Rajabasa is
220 MWe and at the previous paper (Maulida, 2015), we proposed three development steps for this area, and each step
generates 55 MWe with total capacity 165 MWe. At this paper, we proposed another development concept to get
maximum capacity (220 MWe). With this concept, all power plants will produce 1734.48 GWh total energy in one year.
Keywords: Geothermal, steam field, power plant, Rajabasa
Paper ID : 074
Geothermal Direct Use Development To Optimize Renewable Energy Utilization For Agricultural, Aquacultural And
Tourism Activities In Indonesia
Nicolas Jalu Pangesty, Muhammad Dzulfikri Firdaus, Adidanu Saputra
Diponegoro University
Jl. Prof. Sudarto, SH. Tembalang, Semarang, Central Java
[email protected]
ABSTRACT
Indonesia becomes a blessed country due to a huge natural energy resources, especially geothermal energy. Up to 40% of
the world geothermal resources that separated into 312 places in whole area, makes Indonesia the highest potential of
geothermal energy. From 28 Gigawatt, the production of this renewable energy just reach 4.7 % utilized based on
Pertamina Geothermal Energy’s prognosis in 2015. So, there are a lot of opportunities to develop geothermal energy to
increase the utilization of this energy for every aspect of life. Nowadays, Indonesia has been developing direct use
implementation for geothermal energy utilization to many kinds of agricultural and tourism cases. Geothermal
manifestations on the surface such as hot spring or geothermal wells, etc., can be applied for direct use applications.
Generally, the geothermal resources located at the heights or mountains where the agricultural activities and tourism
mostly placed. They need heat for their processes and activities, so this is the perfect chances to develop geothermal direct
use implementation. The simple utilization of geothermal direct use comes from getting steam from small geothermal
wells for spa and hot swimming pool, brine from separator in existing power plant, and produce the heat or steam from
traditional shallow geothermal well for mushroom cultivation, copra and cocoa drying. In other cases, direct use can be
utilized for palm sugar processing and manipulate the aquaculture environment such as mixing the hot water from
geothermal manifestation with fresh water to make the optimal environment for catfish grows. Some area of geothermal
energy production, located at the tea plantation, where the heat of steam can be utilized for the drying and withering
process of tea leaves. Through the activities of geothermal direct use, can be the simple way to optimize this renewable
energy utilization in every opportunity with the easy method, green, and cheap. The advantages are to increase the
productivity of agricultural and aquaculture activities, decrease the fuel use, decrease the emission, and decrease the cost
of agricultural processing. So, Geothermal direct use is the perfect chance to optimize geothermal utilization and
advantages.
51
Paper ID : 075
Geothermal Fluid Characteristic Based on Fluid Geochemistry Analysis, Kepahiang, Bengkulu
Novian Triandanu(1), Boy Yoseph CSS Syah Alam(2), Sapari Dwi Hadian(2), Agil Gemilang R(1)
(1)Student at Faculty of Geological Engineering Padjadjaran University
(2)Lecturer at Faculty of Geological Engineering Padjadjaran University
Jalan Raya Bandung – Sumedang Km. 21 Jatinangor, Indonesia 45363
[email protected]
ABSTRACT
Kepahiang Regency is administratively located in Bengkulu Province with approximately 66.500 Ha wide area.
Geographically Kepahiang Regency is located between 101º55’19”-103º01’29”E and 02º43’07”-03º46’48”S. Around this
area several geothermal surface manifestation are found and divided into seven groups which consist of hot spring, mud
pool, fumarole, and solfatara. Heat source is predicted to be derived from volcanic system of Mt. Kaba. The occurrence of
surface manifestations indicate the existence of active geothermal system in earth subsurface. The objective of this study is
to characterize geothermal fluid and to estimate subsurface temperature. Thermal fluid characterization is using Cl-SO4HCO3 and Na-K-Mg ternary diagram. Geothermometry analysis used to estimate subsurface temperature. Surface
manifestations found grouped into hot spring, fumarole, solfatara and mud pool. Data plotting at Cl-SO4-HCO3 ternary
diagram shows that 1 sample is bicarbonate water, 1 sample is chloride water, 1 sample is sulphate water, 2 samples are
sulphate-chloride waters, and 3 samples are dilute-chloride waters. Data plotting at Na-K-Mg ternary diagram shows that
almost all samples are immature waters. Geothermometry analysis shows highest subsurface temperature is about 280 oC.
Keywords: Kepahiang, Geochemistry, Geothermal
Paper ID : 079
Geology Structure Identification Based on Polametric SAR (POLSAR) Data and Field Geological Mapping at Ciwidey
Geothermal Field
Ratna Amalia Pradipta1, Asep Saepuloh1,2, and Suryantini1,2
Technology Study Program, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung
2Geology Engineering Study Program, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung
[email protected]
1Geothermal
ABSTRACT
Geological structure observation is difficult to be conducted at Quaternary volcanic field. Moreover, the classical problem
at tropical region such as intensive erosion, dense vegetation covers, and rough terrain hamper the field scale observation
of the geological structures. Overcoming the problems, an active remote sensing technology based on Polarimetric
Synthetic Aperture Radar (PolSAR) data was used in this study. The PolSAR data presented in this study is superior to detect
Geomorphologics and Structural Features (GSF) under canopy vegetation. The longer wavelength of microwave than
optical region caused the SAR penetration capability is higher. The Ciwidey Geothermal Field (CGF) at West Java, Indonesia,
was selected as study area because surface manifestations were found without information about surface geological
structures. Visual interpretation based on composite polarization modes was applied to identify geological structures at
study area. The color composite R, G, B for HV, HH, VV polarizations provided highest texture and structural features
among the other composite combination. The Linear Feature Density (LFD) map calculated from total length of linear
features per 1 km2 in the composite PolSAR image was also used to interpret the fractures zones. The identified zones were
used as basis for geological field investigation. Based on visual interpretation of composite PolSAR the direction of main
linear features were detected in NW-SE, NE-SW, E-W, and N-S. In addition, the calculated LFD showed high anomaly about
3.7 km/km2 with two strike directions NW-SE and NE-SW. Interestingly, the surface geothermal manifestation agreed with
the low anomaly of LFD, about 0.6-1.8 km/km2. High erosional level caused by hydrothermal fluid obliterated the trace of
structures. Cross section relationship observed from visual structural features and LFD were used to construct geological
structure mechanism. The geological structures consisted of 10 faults were detected and mapped successfully. The faults
type mainly oblique-slip with strike directions are NE – SW and NW – SE. The detected fault directions were similar with
regional faults. Therefore, geology structure mechanism at study area agreed to the regional tectonic mechanism.
52
Paper ID : 081
The Effectiveness of Hydrothermal Alteration Mapping based on Hyperspectral Data under Tropical Region
1Reyno Rivelino D. M., 1,2Asep Saepuloh
Technology Study Program, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung
2Geology Engineering Study Program, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung
[email protected]
1Geothermal
ABSTRACT
Reflectance spectra in the near- and shortwave infrared region offer signature response for determining the mineralogy of
rocks and soils. Hyperspectral remote sensing could be used to characterize the targets at earth’s surface based on their
spectra. This capability is useful for mapping and characterizing the distribution of host rocks, alteration assemblages, and
minerals. Contrary to the multispectral sensors, the hyperspectral identifies targets with high spectral resolution. The
Wayang Windu Geothermal field in West Java, Indonesia was selected as the study area due to the existence of surface
manifestation and dense vegetation environment. Therefore, the effectiveness of hyperspectral remote sensing under
tropical region was targeted as the objective of this study. The Spectral Angle Mapper (SAM) method was used to detect
the occurrence of clay minerals spatially based on hyperspectral data from Hyperion. The SAM references of reflectance
spectra were obtained from field observation at altered materials. To calculate the effectiveness of hyperspectral data, we
used multispectral data from Landsat 8. The comparison method was conducted by comparing the SAM’s rule images from
Hyperion and Landsat 8 with field observation. The mineral mapping based on hyperspectral is more accurate than
multispectral data. Hyperion SAM’s rule images showed lower value compared to Landsat 8. The significant number
derived from using Hyperion was about 24% better than Landsat 8. This inferred that the hyperspectral remote sensing is
preferable for mineral mapping even though vegetation covered study area.
Keywords: Reflectance, Hyperion, Landsat 8, Wayang Windu, Tropic.
Paper ID : 083
Energy Optimization Modeling of Geothermal Power Plant
(Case Study : Darajat Geothermal Field Unit III)
Rizal Sinaga1, Prihadi Setyo Darmanto2
Management Study Program, Del Institute of Technology, Laguboti, Toba Samosir, Indonesia
2Mechanical Engineering Study Program, Bandung Institute of Technology, Bandung, Indonesia
[email protected]
1Engineering
ABSTRACT
Darajat unit III geothermal power plant is developed by PT. Chevron Geothermal Indonesia (CGI). This power plant has
capacity 121 MW on load 110%. The greatest utilization power is consumed by Hot Well Pump (HWP) and Cooling Tower
Fan (CTF). Wet bub temperature fluctuation provides opportunity for energy optimizing of those equipments. Optimization
of HWP and CTF utilization is applied using Variable Frequency Drive (VFD) and modeling was generated by Engineering
Equation Solver (EES) commercial version 9.430. This model was validated by Process Flow Diagram (PFD) Darajat unit III
and modeling process was reviewed trough Specific Steam Consumption (SSC) nett. Result shows that present operation
reaches its optimum condition and VFD application may be applied if both HWP and CTF operated in frequency 60 Hz.
53
Paper ID : 090
Volcanostratigraphy for Supporting Geothermal Exploration
Sutikno Bronto 1, Juni Yesy Sianipar 2, Akhmad Kunio Pratopo 2,
1 Geological Agency, Ministry of Energy and Mineral Resources,
57th Diponegoro Rd., Bandung 40122, Indonesia,
[email protected]
2Student of Master Program in Geothermal Technology, Faculty of Mining and Petroleum Engineering, Institute of
Technology Bandung.
Jalan Ganesha No. 10, Bandung, Indonesia
[email protected]
ABSTRACT
Volcanostratigraphy is stratigraphy relating to volcanism and its products. This covers stratigraphy for general scope
applied in regional area, and detailed matter in local area. On the basis of Indonesian Stratigraphic Code 1996, from low to
high rank, volcanostratigraphic units are Hummock (Gumuk), Crown (Khuluk), Brigade (Bregada), Super Brigade
(Manggala), and Arc (Busur). In more detailed stratigraphic study those units can be divided into genetic rock units based
on source location, proccesses, and absolute age classification. Genetic proccesses include transportation and cooling or
deposition mechanisms. These lead to physical- and chemical properties of volcanic rocks and imply history of
geovolcanisms and geothermal proccesses as important data in geothermal exploration.
Key words: volcanostratigraphy, hummock, crown, brigade, super brigade, arc, geothermal exploration
Paper ID : 091
Gravity Modeling and Second Vertical Derivative Calculation to Analysis Subsurface Structure at Wayratai Geothermal
Prospect Area, Lampung
Taufiq(1)
(1)Geophysical Engineering Department, Engineering Faculty, University of Lampung
Soemantri Street No.1, Bandar Lampung
[email protected]
ABSTRACT
Wayratai Geothermal Prospect Area, Lampung is near a cluster of Mount Ratai with geological condition in the form of
young volcanic sediment such as lava, breccias, and tuff obtained from the eruption of Mount Ratai. To determine
geothermal potential in Wayratai area, we needed some preliminary surveys such as geological, geochemistry, and
geophysical survey. Based on geological mapping, we obtained several point of manifestations such as 5 hotspring points
(with a temperature 86-90°C), mudpool, steaming ground, and alterated rock. Afterthat, performed with a geophysical
survey using the gravity method to determine subsurface structure and describe the initial conditions of the geothermal
system. Gravity method is used because this method is sensitive to analyze the vertical changes, and can describe the
subsurface conditions based on density variation of rock. Based on data acquisition and literature studies performed on
Wayratai geothermal prospects area, obtained 2D and 3D subsurface model based on density variations. From the model,
obtained area with a density value 2.3-2.6 gr/cm3 and depth from 400 to 2000 m were assumed to be a reservoir zone.
Then, the area with a density value 2.8-3.2 gr/cm3 and depth from 2000-2500 m assumed to be a heat source. With these
density, we can assume that the rock in reservoir area is calcareous-breccia and in the heat source is an andesitic-basaltic
rocks. Based on the analysis of second vertical derivative calculation, obtained value of SVD maximum is greater than SVD
minimum which indicated that the area is a basin structure or normal fault, and its strenghtening of the assumption that
the modelling of the geothermal reservoir is graben form.
Keywords : geothermal prospect, gravity, second vertical derivative, structure
54
Paper ID : 093
Estimation of Geothermal Speculative Resource Potential Using Geochemistry Method in East Manggarai Regency, East
Nusa Tenggara Province
Teguh Rahat PRABOWO1, Muhammad Ghassan Jazmi SHALIHIN1, Aton PATONAH1, Fithriyani FAUZIYYAH2, Andri Eko Ari
WIBOWO3
1 Undergraduate Study Program Faculty of Geology, Universitas Padjadjaran, Indonesia
2 Master Study Program Faculty of Earth Science and Technology, ITB, Indonesia
3 Pusat Sumber Daya Geologi, Ministry of Energy and Mineral Resource, Indonesia
[email protected]
ABSTRACT
Geothermal is an alternative energy that improving in Indonesia and has great potential in Indonesia. But the problem is
the lack of exploitation. So the goverment conduct intensive exploration to several area in Indonesia. One of the area that
become focus in this exploration is East Manggarai, East Nusa Tenggara. East Manggarai is mostly consisted by volcanic
rocks from young volcano such as Mt. Ranaka. This research is an early survey as the first step. The object in this research
are hot springs as geothermal ground manifestation, they are Mapos, Wae Lareng, and Ulu Galung hot spring.
According to the research result, Mapos-Wae Lareng hot spring types are sulfate and bicarbonate while Ulu Galung hot
spring type is sulphate. And if we see the reservoir, Mapos hot spring and Wae Lareng hot spring have the same reservoir.
To support the geochemistry experiment on the hot waters, research on Hg in the soil is conducted so we can achieve the
potential speculative area. And if it combined with geothermometer data we will achieve that the geothermal speculative
resources potential for Mapos-Wae Lareng is 57 Mwe and for Ulu Galung is 0,3 Mwe, which mean that Mapos-Wae Lareng
area is more potential for further research than Ulu Galung.
Paper ID : 095
Geophysical Exploration For Geothermal Low Enthalpy Resources In Ungaran Regency, Central Java
Udi Harmoko1, Hiska Anggit M.2, Gatot Yulianto1, Sugeng Widada3, Yusuf Dewantoro Herlambang4
1) Geophysics Laboratory, Faculty of Science and Mathematics, Diponegoro University
2)Geophysics Master student of Physics Department of University of Indonesia, Indonesia
3) Department of Oceanography, Faculty of Fisherises and Marine Sciences, Diponegoro University
4) Department of Mechanical Engineering, Semarang State Polytecnic
Prof.Soedarto St., Tembalang, Semarang, Indonesia
[email protected]
ABSTRACT
In an effort to further advance understanding of Diwak-Derekan geothermal system, the next geophysical survey has been
carried out extended to the southern area covering Kaliulo, Jatikurung and Kendalisodo geothermal hot springs. The
magnetic residual anomalies have been reproduced especially on the southern part of the main study area. 3D magnetic
analysis and direct current ground resistivity measurement using schlumberger array allowed us to evaluate the subsurface
structure of the sites. Based on magnetic field anomaly and the in situ geological data, a speculation shows that
magnetization intensity assumed for the existence of a cooling magma intrusion is suggested at the southern part of the
study area that is located at Sajen Village.
55
Paper ID : 096
Quantitative Comparison of Two 3-D Resistivity Models of the Montelago Geothermal Prospect
W.A. van Leeuwen1, Suryantini2, G.P. Hersir3
Technology, Velperweg 37, 6813DP Arnhem, the Netherlands
2Institut Teknologi Bandung, Jl. Tamansari 64 Bandung 40116, Indonesia
3Iceland GeoSurvey (ÍSOR), Grensásvegur 9, 108 Reykjavík, Iceland
[email protected]
1IF
ABSTRACT
A combined TEM-MT survey was carried out in the Montelago geothermal prospect, situated on Mindoro Island, the
Philippines, with the aim to obtain the dimensions and depth of the geothermal reservoir as well as to formulate the
prospects’ conceptual model. The acquired MT data are static shift corrected using the TEM measurements. Two different
3-D inversion codes are used to create subsurface resistivity models of the corrected MT data set. The similarities and
differences between the two resistivity models are quantitatively assessed using a set of structural metrics.
Both resistivity models can be generalized by a three-layered model. The model consists of a thin heterogeneous,
conductive layer overlying a thick resistive layer, while the basement has a decreased resistivity.
Although this is a common characteristic resistivity response for the alteration mineralogy of a volcanic geothermal system,
the temperatures at depth are lower than would be expected when interpreting the modelled resistivity model
accordingly. Since the last volcanic activity in the area was about one million years ago, it is anticipated that the resolved
resistivity structure is a remnant of a hydrothermal system associated with a volcanic heat source.
This model interpretation is validated by the alteration minerals present in the exploration wells, where high temperature
minerals such as epidote are present at depths with a lower temperature than epidote’s initial formation temperature.
This generalized description of the resistivity model is confirmed by both resistivity models. In this paper the two inversion
models are not only compared by assessing the inversion models, but also by reviewing a set of gradient based structural
metrics. An attempt is made to improve the interpretation of the conceptual model by analyzing these structural metrics.
Based on these analyses it is concluded that both inversions resolve similar resistivity structures and that the location of
the two slim holes drilled are well chosen.
Paper ID : 097
Resistivity Method for Hydrothermal System Analyze in Way Ratai Geothermal Field
1Anggraeni
Widia, 1Setyadi Bagas
Engineering, University of Lampung
Bandar Lampung 35145, Indonesia
1Geophysical
ABSTRACT
Geothermal is one of the geological resources that potentially for renewable energy, geothermal characterized by the
appearance of hot spring and steaming ground (hydrothermal) in surface of the earth. This research purpose to determine
the model of the geological subsurface in Way Ratai Hydrothermal system based on resistivity measurement data
by geoelectrics resistivity method. Ares Resistivitymeter Type 850 with Schlumberger configuration is used in this
research. As the results of measurements data are modeled in the cross-section of 2D and 3D model. The results of
interpretation indicate that hydrothermal intrusion zones and the distribution of hot water flow in subsurface is showed
in the zones with resistivity values less than 4.5 Ωm. The correlation of the manifestation point with 3D model, that
represent every manifestation in this research area is comes from a hydrothermal system interrelated one each
other, this phenomena are associated with geological condition in the Way Ratai Geothermal Field.
56
Paper ID : 098
Experimental Study of Isothermal Plate Uniformity For Blood Warmer Development Using Geothermal Energy
1)Faculty
1) Y. Ichsan 2)J. Hendrarsakti
of Mechanical and Aerospace Engineering 2) Geothermal Master Program
Jalan Ganeca No 10
1)[email protected] 2)[email protected]
ABSTRACT
This research was conducted to assess the direct use of geothermal energy for blood warmer. The heating plate was made
form aluminum plates with dimensions of 100 x 200 mm and then fed from the hot water heater.
Tests were conducted in the laboratory where geothermal source water is replaced with the heat generated from the
heater. The hot water from the heater in the temperature range 55 °C - 60 °C flowed into vertical chamber. Setting the
temperature of the hot water heater is done by changing the flow of hot water coming out of the heater.
Results showed that the value of a standard deviation of plate temperature was about 0.42 °C, so it can be said isothermal
accordance with design requirement and objective. The test data used for the analysis of the manufacture of the heating
plate in the blood warmer to regulate the discharge of hot water at intervals of 21.47 mL/s to 24.8 mL/s to obtain a
temperature of 37.20 °C – 40,15 °C. Geothermal energy has the potential for blood warmer because blood warmer is part
of the energy cascade in a temperature range of 40 °C to 60 °C.
Keywords: direct use, geothermal energy, temperature, debit, blood warmer
Paper ID : 099
Electricity Generation from Hydrothermal Vents
Yuzar Aryadi 1, 3, Imam Saiful Rizal 1, 4, Muhammad Nur Fadhli 2, 5
of Petroleum Engineering, 2 Department of Mechanical Engineering, Institut Teknologi Bandung
Bandung
3 [email protected] ; 4 [email protected] ; 5 [email protected]
1 Department
ABSTRACT
Hydrothermal vent is a kind of manifestation of geothermal energy on seabed. It produces high temperature fluid through
a hole which has a diameter in various range between several inches to tens of meters. Hydrothermal vent is mostly found
over ocean ridges. There are some 67000 km of ocean ridges, 13000 of them have been already studied discovering more
than 280 sites with geothermal vents. Some of them have a thermal power of up to 60 MWt .These big potential resources
of energy, which are located over subsea, have a constraint related to environmental impact to the biotas live around
when it becomes an object of exploitation.
Organic Rankine Cycle (ORC) is a method of exploiting heat energy to become electricity using organic fluid. This paper
presents a model of exploitation technology of hydrothermal vent using ORC method. With conservative calculation, it can
give result of 15 MWe by exploiting a middle range diameter of hydrothermal vent in deep of 2000 meters below sea level.
The technology provided here really has small impact to the environment. With an output energy as huge as mentioned
before, the price of constructing this technology is low considering the empty of cost for drilling as what it should be in
conventional exploitation. This paper also presents the comparison in several equipment which is more suitable to be
installed over subsea.
Keywords: ORC, Hydrothermal Vent, Subsea.
57
Paper ID : 101
Minigeo : Small Scale Geothermal Power for Remote Off-Grid Communities
N. Willemsen, MSc. J. H. Kleinlugtenbelt, MSc. Drs A. Willemsen
IF Technology
Velperweg 37, Arnhem
The Netherlands
[email protected]
ABSTRACT
This paper is a first feasibility scan of a small-scale off-grid geothermal power station based on low/medium enthalpy
geothermal resources. As a counterpart to Minihydro we call this system MiniGeo. The goal is to replace diesel generator
sets commonly found in areas not covered by conventional power grids. This study found several benefits from using the
MiniGeo system in off-grid areas that have suitable geology. These include: Lower energy costs, reliable and controllable
power supply, combined heat and power production, no CO 2 emission and small land usage. The downside is that almost
all costs are made upfront and a suitable geology is required. For suitable geological locations the Levelized Cost of Energy
(LCOE) is around $0,10- $0,20/kWh. Almost half that of power from pv-battery systems and a third the cost of power made
from diesel generators.
Paper ID : 104
Design of Tomato Drying System by Utilizing Geothermal Brine
W. Afuar1, B. Sibarani1, G. Abdurrahman1, J. Hendrarsakti1,2
1Geothermal Master Program ITB, Bandung, Indonesia
2 Faculty of Mechanical and Aerospace Engineering ITB, Bandung, Indonesia
[email protected]
ABSTRACT
Cultivation of tomato plants in Indonesia has been started since 1961.Tomatoes generally will rot in three days if left on
storage. Moreover, low quality tomatoes have cheaper price. After harvested, tomatoes need to be treated by drying
process so it can last longer. Energy for drying tomatoes can be obtained by utilizing heat from geothermal brine.
Purpose of this research is to design a tomato drying system by extracting heat of geothermal brine from separator with
certain flow rate to heat up water by using a heat exchanger. Furthermore, this water will be used to heat up the
surrounding air which is circulated by blower system to heat up the tomatoes chamber. Tomatoes drying process needs
temperature range of 50-70 °C to evaporate water content from 95.7% to 26%. After that treatment, the tomatoes are
expected to have better durability. The objective of this study is to determine the quantity of hot brine which is needed for
drying tomatoes and to design a drying system so that tomatoes can last longer.
Keywords: tomato dryer, geothermal brine, heat exchanger, direct use.
58
Paper ID : 107
Geological, Isothermal, and Isobaric 3-D Model Construction in Early Stage of Geothermal Exploration
Mahesa Pradana Saputra1, Suryantini2, Danilo Catigtig3, Riky Regandara, Sitti Nur Asnin, Angga Bakti Pratama
1,2 Graduate Program in Geothermal Technology, Faculty of Mining and Petroleum Engineering
2Engineering Geology Study Program, Faculty of Earth Sciences and Technology
Institut Teknologi Bandung, Bandung 40132, Indonesia
3 Emerging Power Inc., Philippines
1 [email protected], 2 [email protected], [email protected]
ABSTRACT
Construction of geology, thermal anomaly and pressure distribution of a geothermal system in the early stage of
exploration where data is limited is described using a 3-D software, Leapfrog Geothermal. The geological 3-D model was
developed from a topographic map (derived from DEM data), geological map and literature studies reported in an early
geological survey. The isothermal 3-D model was constructed using reservoir temperature estimation from
geothermometry calculated from chemical analyses on surface manifestations, available shallow gradient temperature
hole data and the normal gradient temperature (3°C/100m) for a non-thermal area. The isobaric 3-D model was built using
hydrostatic pressure where the hydrostatic pressure is determined by the product of the fluid density, acceleration due to
gravity, and depth. Fluid density is given by saturated liquid density as a function of temperature.
There are some constraints on the modeling result such as (1) within the predicted reservoir, the geothermal gradient is
not constant but continues to increase, thus, creating an anomalously high temperature at depth, and (2) the lithology
model is made by interpolating and extrapolating cross-sections whereas usually only two to three geology sections were
available for this study. Hence, the modeler must understand the geology. An additional cross section was developed by
the modeler which may not be as suitable as the geologist constructed sections.
The results of this study can be combined with geophysical data such as gravity, geomagnetic, micro-tremor and resistivity
data. The combination of geological, geochemical, isothermal, isobaric and geophysical data could be used in (1) estimating
the geometry and size of the geothermal reservoir, (2) predicting the depth of top reservoir, and (3) creating well prognosis
for exploration and production wells.
Keywords: 3-D Model, Leapfrog Geothermal.
Paper ID : 111
Occurrence of Sarawet Hot Spring : What Affects the Outflow?
Windi Anarta Draniswari1, Rezki Naufan Hendrawan1
Engineering, Master Program, Bandung Institute of Technology
[email protected]
1Geological
ABSTRACT
Geothermal systems located in volcanic arc are generally influenced by volcanic activities. But at the complex geological
setting like Sulawesi the geothermal systems probably is not only influenced by volcanic activities but also structural
geology features. Our study shows that the surface geological-structural analysis in combination with the geochemistry and
the heat flow investigation is the essential tools for geothermal systems or manifestation characterization. Tectonics, crust
characteristic, heat flow, and surface structural figure could affect the manifestations and its geothermal systems.
Sarawet hot spring in Minahasa is a kind of volcanic-influenced and fault-influenced manifestations. Sarawet hot spring is
located in north coast Minahasa. Geochemically the water is bicarbonate, peripheral-immature water, and characterized
by a meteoric water-line trend. The composition of these thermal springs was controlled by a secondary process during
ascent. Based on hydrologic gradient, heat flow characteristic and subsurface structural analysis, the mechanism of
Sarawet hot spring is a lateral outflow that affected by dynamically maintained fractures system.
Keywords : Sarawet, volcanic and fault influenced, lateral outflow
59
Paper ID : 112
The Cooling History Of Residual Magma As Heat Source
I G.B. Eddy SUCIPTA and Isao TAKASHIMA*
Department of Geology, Faculty of Earth Sciences and Technology, Bandung Institute of Technology, Jl. Ganesha 10
Bandung – 40135, INDONESIA,
[email protected]
*Emeritus Professor at The Research Institute of Material and Resources, Akita University,1-1 Tegata gakuen-machi, Akitashi, Akita 010-8502 JAPAN,
[email protected]
ABSTRACT
The Bajawa Geothermal Field is located on the island of Flores, Indonesia. This area could be one of the most prospective
geothermal area on Flores island, consist not only of such numerous active volcano as Inerie and Inie Lika but also potential
geothermal manifestations as Wolo Bobo, Nage, Mataloko and Mengeruda.
The Bajawa Geothermal Field related to the Bajawa Cinder Cone Complex that their volcanic rocks displayed the heating of
andesite magma by invading the higher temperature and more mafic magma (basaltic magma) in their magma chamber.
The basaltic magma have temperature range of 10560C-11640C based on the Fe-Ti oxides temperature. There are three
batches of magma with the two magma recharge in the long life of the Bajawa Cinder Cone Complex at the 0.73 Ma to 0.14
Ma which the magma mixing and fractional crystallization are the important processes in differentiation of magma. The
magma mixing have done in the early crystallization of each magma batches and then after well mixing the magma have
been doing a normal fractionation crystallization.
The cooling history of residual magma in the magma chamber of the Bajawa Cinder Cone Complex is approximately
3.0250C/1000 years (302.50C/0.1 Ma) between 0.23 Ma to 0.14 Ma and then changed approximately of 2.4290C/1000 years
(242.90C/0.1 Ma)
from 0.14 Ma to the present time.
Paper ID : 114
Classifying Hot Water Chemistry: Application Of Multivariate Statistics
Prihadi Sumintadireja1, Dasapta Erwin Irawan1, Yuano Rezky2, Prana Ugiana Gio3, Anggita Agustin1
of Earth Sciences and Technology, Institut Teknologi Bandung, Jalan Ganesa No. 10, Bandung 40132
2Dirjen EBTK
3Faculty of Math and Natural Sciences, Universitas Sumatera Utara, Jl. dr. T. Mansur No. 9,
Medan 20155
[email protected]
1Faculty
ABSTRACT
The following paper is a try out on the application of multivariate analysis (regression tree, principal component analysis,
and cluster analysis) for classifying hot water chemistry. The number of sample analysed was 11 (including three coldwater samples), taken from three Gorontalo geothermal sites (Boalemo, Pohuwato, and Gorontalo Regency.
Regression tree technique has failed to read the data structure due to collinearity effect therefore PCA and cluster analysis
were applied. We used open source R statistical packages to do the calculation.
Such technique classifies hot water samples into three major clusters: cluster 1 (hot water from Diloniyohu-Boalemo),
cluster 2 (combining hot water from Tungo and Dulangeya-Boalemo, and cold water from Dulangeya-Boalemo), and cluster
3 (cold water from Pohuwato and Diloniyohu-Boalemo). According to the results, hot water from Boalemo consists of
systems: distinct geothermal system and mixing system with meteoric water, while hot water from Pohuwato has no or
less mixing with meteoric water.
The statistical is able to detect the close and open geothermal system based on data structure. This robust method should
be applied to more geothermal system with larger dataset to see its performance.
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Paper ID : 115
Resource Management using Numerical Modeling and Apparent Productivity Index
William L. Osborn1, Dennis Kaspereit1, William Rickard1, Mary Mann1 and Magdalena Perez2
1 Geothermal Resource Group, 77530 Enfield Lane, Bldg. E, Palm Desert, CA 92211
2 Momotombo Power Company, Reparto Las Cumbres, Casa D13, Managua, Nicaragua
[email protected] [email protected]
ABSTRACT
Numerical simulation is most commonly used to evaluate the current and future generation potential of geothermal
reservoirs. However, a well-calibrated numerical model can also be used to identify deficiencies in the conceptual model, in
addition to well bore and formation damage. Using a numerical model calibrated by detailed history matching, an apparent
productivity index, or analogous apparent injectivity index, can be calculated for the production history of each well in the
field. The resulting apparent productivity index trend can then reveal formation-related losses in productivity or injectivity.
Difficulty in achieving as suitable history match, based on assumed well conditions, may reveal potential well damage. We
use a revised conceptual model and numerical simulation of the Momotombo geothermal field to demonstrate the utility
of these tools for identification of several common wellfield problems. Within the history matching process of the
numerical model, two downhole well bore failures were identified.
Paper ID : 116
A Collaborative Engineering Approach To Achieve Success In Geothermal Drilling Application
Yudi Indrinanto, Manuel Centeno Acuna, William Thomas, Michael Ari Dhanto, Agus Ziyad Kurnia, Erik Gunawan
Supriatna, Bonar Noviasta, Donny Trias Ardianto, M.R. Yoan Mardiana
Schlumberger
Beltway Office Park, Building C, 6th Floor, Jakarta Selatan, Indonesia
[email protected], [email protected], [email protected], [email protected], [email protected],
[email protected], [email protected], [email protected], [email protected]
ABSTRACT
With the current downturn of the oil business, geothermal projects remain stable and will ramp up in line with the
Indonesian government commitment to provide 35,000 MW electricity by 2019.
After 5 years absence in geothermal business, Schlumberger is putting back its footprints in the geothermal business by
providing an integrated drilling services to Star Energy, one of the main geothermal key players in Indonesia. A
collaborative engineering approach was performed by different drilling segments in Schlumberger to produce an
integrated planning, execution, and evaluation to achieve a safe and successful drilling operation.
Schlumberger integrated drilling services delivered a successful drilling operation that enabled Star Energy to achieve an
actual production level exceeding the planned production.
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Paper ID : 117
Analysis on Scaling Problem in Injection Line: A Case from Muara Labuh Geothermal Field, Indonesia
Alfiady1, Robi Irsamukhti1, Alfianto Perdana Putra1, Herwin Azis1 and Jantiur Situmorang1
Energy, Menara Sentraya, 23rd Floor Jl. Iskandarsyah Raya No. 1A Kebayoran Baru, Jakarta 12160
[email protected]
1Supreme
ABSTRACT
Scaling was observed in the injection pipe line during the long term production tests conducted near the end of the
exploration drilling program at the Muara Labuh Geothermal field. The scaling significantly reduced the ability of the
injection line to transfer the produced brine to the assigned injector, constraining the production well to be flowed at
maximum opening condition.
XRD and Petrography analysis of the scale samples shows the scale consists of mainly Halite (Sodium Chloride; NaCl) with
negligible silica (<5%). Apparently, the open injection system created alot of evaporation which led to Halite precipitation.
While, silica - in the form of amorphous silica- is normal to precipitate in brine pond due to a significant brine fluid
temperature drop.
In-situ solubility test on the scale samples provided confirmation that Halite is soluble in fresh water. Therefore, a
treatment of pumping fresh water through the scaled pipe line was conducted and successfully restored the injection
capacity.
Paper ID : 118
A Preliminary Research Of Direct Contact Geothermal Steam Condensation In The Presence Of Non Condensable Gas
Vivi Apriyanti1*, Willy Adriansyah1, Ari D. Pasek1, Y.B. Agastyo Nugroho2, Candra M. Sufyana2, Abdurrachim1
1Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung
2Geothermal Master Program, Institut Teknologi Bandung
Jl. Ganesa 10, Bandung 40132, Indonesia
[email protected]
ABSTRACT
Condenser is an important equipment at a steam power plant. Vacuum pressure in the condenser is generated during the
process of condensation gives greater difference in enthalpy of the turbine, thus increases producing of electrical energy
output. In geothermal power plants steam coming from the well always contain non condensable gasses (NCG). The
content of non condensable gas and the temperature of cooling water are two parameters that varied and difficult to
control. NCG concentration depends on the condition of wells plants, while the cooling water temperature is determined
by the temperature of the air around the plant and the cooling tower performance. The presence of non condensable
gasses is believed will decrease the heat transfer rate in the condensation process compared to the pure water vapor. Not
many information yet available in the literature for direct contact condensation heat transfer of water vapor in the
presence of non condensable gas. In this research water will be sprayed into saturated steam containing a small amount
of CO2 and condensation heat transfer coefficient will be investigated. The design of experimental set up and the
construction of equipment such as condensation chamber, steam generator, CO 2 tank, mixing chamber of steam and CO2
and the assesories has been done recently. CO2 concentration will be varied between 0 to 4% and the condensation will be
run at atmospheric and vacuum pressure. Parallel to this work a numerical simulation is on going. The numerical result and
experimental result will be compared and reported. In this paper, relevant researches are reviewed and construction for
heat transfer condensation experimental set up in the presence of NCG is presented.
Keywords: non condensable gas, direct contact condensation, heat transfer rate
62
Paper ID : 119
A Comprehensive Well Testing Implementation During Exploration Phase in Rantau Dedap, Indonesia
Muhammad Tamrin Humaedi, Alfiady, Alfianto Perdana Putra, Rudy Martikno, Jantiur Situmorang
PT Supreme Energy
Sentraya Tower 23rd Floor. Jl. Iskandarsyah Raya 1A, Kebayoran Baru. Jakarta 12160 - INDONESIA
[email protected]
ABSTRACT
This paper describes the implementation of comprehensive well testing programs during the 2014-2015 exploration drilling
in Rantau Dedap Geothermal Field. The well testing programs were designed to provide reliable data as foundation for
resource assessment as well as useful information for decision making during drilling. A series of well testing survey
consisting of SFTT, completion test, heating-up downhole logging, discharge test, chemistry sampling was conducted to
understand individual wells characteristics such as thermodynamic state of the reservoir fluid, permeability distribution,
well output and fluid chemistry. Furthermore, interference test was carried out to investigate the response of reservoir to
exploitation.
Paper ID : 121
Performance Prediction of Two-Phase Geothermal Reservoir Using Lumped Parameter Model
Famelia Nurlaela and Sutopo
Master Program of Geothermal Technology, Faculty of Mining and Petroleum Engineering,
Jalan Ganeca 10, Bandung, 40132, West Java, Indonesia
[email protected] and [email protected]
ABSTRACT
Many studies have been conducted to simulate performance of low-temperature geothermal reservoirs using lumped
parameter method. Limited work had been done on applying non-isothermal lumped parameter models to higher
temperature geothermal reservoirs. In this study, the lumped parameter method was applied to high-temperature two
phase geothermal reservoirs. The model couples both energy and mass balance equations thus can predict temperature,
pressure and fluid saturation changes in the reservoir as a result of production, re-injection of water, and/or natural
recharge. This method was validated using reservoir simulation results of TOUGH2. As the results, the two phase lumped
parameter model simulation without recharge shows good matching, however reservoir model with recharge condition
show quite good conformity.
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Paper ID : 122
Use Of Sub-Terrain Technology In Geothermal Exploration
George Barber1) and Madjedi Hasan &, Anton Wahjosudibjo2)
1) Indonesia International Energy Solution Partners (IEP)
2) Pranata Energi Nusantara (PENConsulting)
ABSTRACT
Similar to oil and gas undertaking, geothermal exploration, development, and operations are costly and also subject to
uncertainties, which vary among different geothermal reservoirs. However, while in oil and gas exploration, the potential
can be identified with reasonable confidence prior to drilling through the utilization of available geophysical techniques,
they are not as effective and do not provide the same level of confidence in defining geothermal reservoirs. In exploration,
risk in the form of time, expense and success are a given. The key is to manage the risk effectively, which means that we
need to use all the tools that are available in the modern explorer’s toolbox, which includes traditional and unconventional
methods.
In order to provide a catalyst for the explorer and investor to bring their capital, the catalyst should be in the form of
confidence building data and indications of prospects. Technology is part of the answer for successful exploration to find
resources; the technology should be able to dramatically reduce the time, cost and risk before applying more expensive
traditional exploration tools such as seismic and exploratory drilling. By pre-staging conventional exploration with
unconventional tools, one focuses precious exploration finances on high-probability targets, which in turn will achieve
higher returns on investment. This paper will discuss the potential application of Sub Terrain Prospecting (STeP®)
technology as tools of confirmation in geothermal undertaking to supplement the conventional exploration tools.
STeP® is a proprietary, remote sensing and analytical technology of Terra Energy & Resource Technologies which interprets
and quantifies various natural phenomena manifests at the surface using sophisticated algorithms and models, such
phenomena being directly linked to subsurface geological features.
STeP® technology includes multi-spectral satellite data analysis, which in contrast to other Remote Sensing methods
provides not only horizontal distribution of thermal anomalies but also vertical/cross-sectional geo-informational
anomalies, together with structure-metric analysis, reflecting the structure in both horizontal and vertical planes over the
target area.
STeP® technology has evolved over the past 30 years with many successful projects having been carried out in various
parts of the world. STeP® can improve the exploration success rate, reduce the time from years to months, and reduce the
risk of exploratory survey and drilling costs. Pre-staging exploration should drive significant investment for the
governments geothermal development plans for Indonesia, whilst at the same time decreasing the time, cost and risk.
Paper ID : 129
Natural State Modelling in Hululais Geothermal Field Based on Exploration Data
Pudyo Hastuti, Sutopo and Marihot Silaban
Pertamina Geothermal Energy, ITB
ABSTRACT
Hululais geothermal field is located in the province of Bengkulu, Indonesia and operated by PT Pertamina Geothermal
Energy (PGE). The field development plan has been initiated through exploration activities since 1994. Hululais are now
entering the stage of development with three exploration wells for planning of 2 × 55 MW plant. This field is expected to
be commercial in early 2018 and 2019. Evaluation and reservoir modeling is required to determine and predict the ability
of the reservoir during the term of the contract including the number of production and injection wells to be drilled. The
model will be run in various production scenarios in order to obtain optimum reservoir management strategy.
The results of the modelling and simulation of the reservoir at the natural state conditions showed a good enough
matching for the temperature and pressure data of three exploration wells. Distribution of pressure and temperature also
have compatibility with the the flow pattern at conceptual model which the flow of fluid move from Suban Agung and
Mount Beriti toward the north where the reservoir temperature about 260 - 300 °C with top of reservoir located at an
elevation of 0 meters above sea level. Control structures play a huge role in the pattern of fluid flow in the field of Hululais.
The movement of the fluid which is controlled by the structure of the NW-SE trending si confirmed by the well HLS HLS A-1
and C-1.
Keywords: reservoir simulation, natural state, forecasting, Hululais
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Paper ID : 131
Assessment Thermal Flow Direction of Geothermal Manifestation Based on Temporal Analysis of Temperature
Distribution at Pine Forest Park, Tomohon, North Sulawesi
Cyrke A. N. Bujung1), Donny R. Wenas2)
Physics Department FMIPA Manado State University
e-mail: [email protected] 1), [email protected])
1,2)
ABSTRACT
The presence of geothermal energy resource subsurface is reflected on the surface by the appearance of geothermal
manifestation, i.e. hot spring, hot mud, fumaroles, etc. Existence of surface geothermal manifestation occurred as
consequence thermal propagation from subsurface by fractures as geothermal fluid medium to surface.
This research describes the surface temperature distribution and to know thermal direction based on temporal analysis of
temperature distribution at pine forest park, Tomohon North Sulawesi. This research apply the remote sensing methods
with thermal infrared channel recorded in years 2013, 2014, and 2015. The result of research shows that thermal anomaly,
and thermal flow direction of geothermal manifestation at pine forest park trend toward northeast.
Keywords: Thermal flow direction, geothermal manifestation, temporal analysis.
Paper ID : 132
Influence of Hydrothermal Alteration on Petrophysical Properties of Rocks in the Cibolang Area, Bandung
Arif Susanto , Suryantini1, Imam A. Sadisun1, Asep Saepuloh1, Noriyoshi Tsuchiya2
1Geological Engineering Study Program, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung, Indonesia
2Graduate School of Environmental Studies, Tohoku University, Japan
[email protected]
ABSTRACT
The Cibolang Area, southern part of the Wayang Windu geothermal field is situated in the West Java province of Indonesia
are covered by volcanic rocks of Wayang-Windu Volcanic Complex. Some surface manifestation as solfataras, hot springs
and an intensive hydrothermal alteration present in this area. Thermal vapour and water altered and transformed volcanic
rocks into hydrothermal rocks. Volcanic rocks as andesite, pyroclastic breccia and tuff altered into argillic and advanced
argillic alterations. Based on petrographic, X-ray diffraction and SEM analyses, the mineralogical alteration consist of
kaolinite, halloysite, alunite, illite, cristobalite, pyrite and sulphur. Petrophysical properties depend mainly on rock primary
features (composition, structure, grain size, heterogeneity) and hydrothermal alteration. Clay minerals of rocks decrease in
shear strength along with other petrophysical properties that promoting the slope instability and triggering landslides.
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Paper ID : 133
Contamination of Thermal Water to Groundwater in Kertasari Area, Bandung
Arif Susanto , Suryantini1, Joshua Satriana1, Munib Ikhwatun Iman2, Noriyoshi Tsuchiya3
1 Geological Engineering Study Program, Faculty of Earth Sciences and Technology,
Institut Teknologi Bandung, Indonesia
2 Center of Groundwater Resources and Environmental Geology, Geological Agency,
Indonesia
3 Graduate School of Environmental Studies, Tohoku University, Japan
[email protected]
ABSTRACT
The Kertasari Area, eastern part of the Wayang Windu geothermal field is situated in the West Java province of Indonesia.
Some surface manifestation as solfataras, hot springs and an intensive hydrothermal alteration present in this area.
Hydrogeochemical study was conducted to find out contamination of thermal water to groundwater in Kertasari Area and
interpretation eastern boundary of Wayang Windu Geothermal System. Thermal and cold springs samples were collected
from two hot springs, three warm springs and five cold springs, subjected to physical properties, major cation and anion,
also isotope analyses. Result of this study shows that cold springs of Situ Kinceu, Cikoleberes and Citawa-2 experiencing
increase of temperatures, total dissolve solid (TDS), sulphate and bicarbonate content, while pH decreasing that suggested
contaminated by thermal water. The contaminated of cold spring confirmed by SO42- and HCO3- anion increasing range
from three to five times than local meteoric water The geothermal system boundary is estimated between thermal spring
or contaminated cold spring with uncontaminated cold spring.
Paper ID : 134
On the Feasibility of Geothermal Heat Production from A Hot Sedimentary Aquifer : A Case Study of the Jababeka
District, West Java
Nurita Putri Hardiani, Setya Drana Harry Putra
Geothermal Master Program of Institut Teknologi Bandung
Jl Ganesha No 10, Bandung
[email protected]; [email protected]
ABSTRACT
This study describes an approach taken for understanding the technical feasibility of geothermal heat extraction from a Hot
Sedimentary Aquifer (HSA) reservoir. A numerical modelling technique is employed that allows for reliable prediction of
changes to the target reservoir’s production behaviour based on their sensitivity to variations in a number of physical
parameters. The present study considers the effects of the modelled reservoir’s permeability, aquifer thickness,
production-reinjection well spacing, production flow rate, and reinjection temperature to be evaluated. An HSA reservoir
that constitutes a part of the greater onshore North West Java Basin and presumably underlies the Bekasi Regency area is
selected as a case study. The region is also of a great interest due to the numerous types of industry it currently hosts,
most of which are likely candidates for future applications of direct geothermal energy utilization from sedimentary basins.
In addition, past petroleum resource exploration activities has provided significant information that is used to constrain the
reservoir modelling procedure to a certain extent. It is demonstrated that the results obtained by carrying out the
systematic methodology proposed in this study are sufficiently reliable for use in predicting the feasibility of proposed
thermal energy extraction schemes for the HSA reservoir underlying the study area. It is shown that the HSA reservoir
evaluated in this study is predicted to be capable of producing a 150°C hot fluid for 150 years.
66
Paper ID : 135
Geology and Prospecting for Hidden Geothermal System of Manglayang Volcano Complex of Bandung-West Java
Subandrio, AS*., Sumintadireja, P*., Irawan, D* and Suryantini
*Program Studi Teknik Geologi – FITB -ITB
ABSTRACT
Manglayang Volcano Complex (MVC) is the Quarternary volcanic cone in the northern part of Bandung area, one of the
examples of an active subduction zone in southern of West Java. Widespread volcanism has been active in this region in
the Late Pleistocene, producing large volumes of lavas and pyroclastics covering a narrow belt, across the southern
Lembang zone, from the Palasari in the western to Manglayang .Three major evolutionary stages have been identified in
the evolution of the MVC: pre-eruption, post-eruption and late stages. The pre-eruption stage is further differentiated into
effusive, extrusive and explosive phases, the latter being responsible for the lava and pyroclastic formation. The products
of this stage cover a compositional range from basalts to andesite, and consist of lava flows and associated pyroclastics.
The post-eruption stage consists of three phases comprising presumably phreato-magmatic eruptions. The late stage
consists of the explosive and the following effusive phases with pyroclastic flow, respectively. The major and trace element
systematics, along with petrographic evidences, suggest clinopyroxene + plagioclase ± olivine ± amphibole as the major
fractionating phases governing the liquid evolutionary paths, with a progressive increase in the proportions of plagioclase
and amphibole in the fractionating assemblages during the course of magmatic differentiation. The other purpose of this
study was also to appraise the feasibility of finding hidden geothermal systems in the MVC using geoelectrical tomography
methods. The results were used to try to estimate what a suite of geophysical surveys of the prospect would see. In this
paper, we review the recently exploration on MVC and the results of the theoretical studies. We suggest that a suite of
electrical surveys together with shallow heat flow surveys and relevant local geological and hydrogeological observations
offers a promising approach to the identification and preliminary characterization of hidden geothermal systems.
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Untitled - Geothermal Master Program ITB

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