Special Features of Downhole Equipment Designed by Geotron JSC

RUSSIAN FEDERATION
JOINT-STOCK COMPANY
GEOTRON
Special features of borehole equipment
designed by JSC Geotron while monitoring
and control of oil and gas wells
Typical geological conditions of Western Siberia
 Pressure at borehole bottom till 100 MPa;
 Max temperature at borehole bottom - 150 С°;
 Max porosity till 30 %;
 Mineralization of stratal water till 30 g/l
Typical geological conditions of Western Siberia
 Resistivity : water-bearing reservoir from 1,5 till 6,4 OHMM,
productive reservoir from 6 till 60 OHMM, mud shale from 1 till
10 OHMM;
 Natural radioactivity of formations - 2-20 mcR/hr;
 Gas factor ranges till 300 м3/t.
Enhanced equipment for pulsed neutron
gamma-ray logging (IGN-PS)
Range of application:
• Dismemberment of litological section
• Evaluation of current oil saturation
• Identification of gas-liquid (oil-water) contact
• Formation porosity evaluation
• Monitoring of borehole operating conditions (detection of behind-thecasing flows and places of water entry)
Time spectrum of radiative capture gamma-rays
Decrement curve of gamma-ray rate at closed and remote sound
Time spectrum of radiative capture gamma-rays
Approximation of time distribution by sum of exponent
Complex downhole equipment of radioactive
logging, tools of KSAT-RK production line
Range of application:
• Estimation of water-filled porosity of formation
• Evaluation of residual oil saturation
• Identification of gas-liquid and oil-water contact
• Identification of fluid’s inflow intervals to the borehole
Complex downhole hardware KSA-T12
Range of application:
• Identification of leakage
places in casing string.
• Identification of fluid inflow
intervals into well
• Analysis of downhole liquid
composition
• Identification of perforation
intervals
Measurable parameters:
•Recording temperature,
identification of temperature
anomalies.
• Recording pressure
• Recording of fluid conductivity
• Recording exposure rate of
gamma radiation
• Fluid flow rate
• Rate of flow
• Fluid dencity
Complex downhole hardware for survey gas
production wells KSAT-GAS, KSAT-GDI
Range of application:
• Recording physical parameters in gas wells (P,T,V)
• Identification of leakage places of tubing
• Identification of fluid inflow intervals into well
• Determination of acoustic noise character in a well
Downhole Density meter
PL2-38
Range of application:
• Recording of fluid density
• Identification of seal failure intervals in tubing and casing pipes
• Degassing intervals resolution
Scattered gamma radiation downhole Density
meter PLR-38
Range of application:
• Geophysical survey with technique of gamma-gamma logging
by scattered gamma radiation
• Monitoring of density and borehole fluid interfaces in annular
space (behind-the-casing zone).
Equipment for monitoring of cementing
KSAT-KTSС
Range of application:
• Technical state monitoring of casing string
and cement stone
• Estimation of well cementing quality by 6
radial directions
• Identification of casing string’s wall
thickness by gamma-gamma logging
• Recording natural gamma activity of
formation
Complex downhole hardware for horizontal wells
KSAT-GR43
Range of application:
• Identification of downhole fluid composition by borehole cross
section
• Results of identification connect with apsidal plane
Hardware has transducers of composition on its levels
Complex downhole equipment for monitoring of
working operations KSAT-KPT
It is designed for orientation of opening
production formation by jet perforator
Range of application:
• Initialization of explosion
• Determination of acoustic noise character
in well.
• Analysis of hydrodynamic parameters of
formation after its opening
Complex module KSAT-KPK
It is designed for geophysical maintenance of jet perforation and applies
for identification of factual perforation intervals
Swabbing monitoring module KSAT-KS
Swabbing monitoring complex module is designed
for geophysical and technological maintenance. It is
integrated with downhole equipment for swabbing.
Applies for monitoring the level of liquid and its
mineralization.
Complex downhole hardware for well monitoring
KSAT-MNS
Installed under down-hole pump
Saves information for further analysis of bad
exploration.
Range of application:
• Recording of temperature and pressure in
production wells.
• Identification of well yield
Downhole equipment for perforation
and well development by ejector jet pump
Ejector jet
pump
Mechanical
packer
Slot perforating
machine
Stage 1.
Perforation of
the string
Stage 2.
Treatment of the
formation
Stage 3.
Development
Hydromechanical slot perforator PSH2
Instrum
ent
Diameter of
the casing
pipe, mm
Wall
thickness,
mm
Width of
slot, мм
Group of
strength
Max pressure,
MPa
PSH102
102,114
5-10
12
C,D,K,E
20
PSH168
140-178
5-12
14
C,D,K,E
30
Advantagies of Slot Perforation
•
Spare influence on flow string and cement sheath above and below
of perforation interval (no high-explosive action)
•
Specific area of 1 meter casing hole is larger by 12-14 times than
ordinary cumulative perforation is used
•
Cutters are out of casing string on 16-18 mm, that allows considerably
to destroy the cement sheath
Advantagies of Slot Perforation
• It is possible to treat bottom hole formation zone by fluid, i.e. chemical
acid solution with penetrability into formation from 0,5 till 1,3 meters
through ejectors.
• After hydromechanical perforation is over it is possible to explore well
by jet pump or swabbing without lifting of perforator
• Flowing through perforator is available until the nearest repair.
• Ability to open sidewalls and horizontal wells