PDF File

No
orthe
east Regio
R on:
L2/5
57
L2/57 is located in Khon Kaen, Udonth
hani and Nong
N
Bua Lamphu
L
prrovinces. It covers
2
the are
ea of 1,925.63 km an
nd surround
ds The Sin Phu Horm
m productio
on area (ga
as
field).
a
L2/57 cconsists of at least 3 prospects which are Kok Sathon (fig. 2), PPhu Khao and
Non Saang (fig. 3). The explo
oration playy of the Ko
ok Sathon is the Loweer-Middle
Permiaan carbonate reservoiir of the Ph
ha Nok Kha
ao Formation sourced
d by Uppe
er
Carbon
niferous Sri That Form
mation in th
he deeper part (fig. 2).
2 Moreoveer, the Tria
assic
Kuchinarai Group
p in the low
w area can be a sourcce rock for Pha Nok Khao Form
mation
in the h
high area. The
T seismic profile (ffig. 2) show
ws apparen
ntly reef feaature of Ph
ha Nok
Khao FFormation which
w
is exxpected to be a porous reservoir. Due to m
minor gas shown
in Phu Kao-1 well, the Triassic red bed
d is also a potential
p
play
p for thee Phu Kao and
a
Non Saang prospe
ects (fig. 3).
Figu
ure 1
Kok Sathon
S
prosp
pect with reeef Permian ca
arbonate play
y shows a po
otential reserrvoir.
Figure 2
Phu Kao prospect and
d Non Sang p
prospect with minor gas shown from well Phu Kao-1 in
ed beds interlayered with
h volcanic ind
dicating pote
ential petroleeum system.
Triassic re
L3/5
57
L3/57 is located in Sakon Nakhon, Ud
donthani an
nd Kalasin provinces. It covers the
t
2
area off 1,966.67 km
k .
L3/57 cconsists of at least 3 prospects which are Sri That, Chaiwan (fig
g. 4) and Phu
Kratae (fig. 5). For those pro
ospects, th e exploration play is the Lowerr-Middle Pe
ermian
nate reservo
oir of the Pha
P Nok Kh
hao Forma
ation sourced by Upp
per Carboniferous
carbon
Sri That Formatio
on. Moreovver, the Triaassic Kuchiinarai Grou
up in the lo
ow area can be a
source rock for Pha Nok Kh
hao Formattion in the high area.
For the
e Sri That prospect
p
(fig. 4) and P
Phu Kratae (fig. 5), Ph
ha Nok Khaao Formation is
thruste
ed and defo
ormed as fault
f
propaagation folds and perrformed 3--way closurre. The
seismicc profile (fig. 4) shows thin-skin
nned thrustting with flat-ramp geeometry
underlaain by exte
ensional ho
orst and grraben. Morreover, the horst blocck is also a
potential play. Du
ue to the Sri-That-2
S
w
well result, some sub commerciial gas has been
shown from the horst
h
block
k in Pha No
ok Khao Fo
ormation.
For the
e Chaiwan prospect (ffig. 4), the low contin
nuity with high
h
amplittude reflecctors
above purple horrizon are in
nterpreted as the Upp
per Triassic
c clastics w
which depo
osited
in Alluvvial-Lacustrine. There
efore, a goo
od source rock, reserrvoir and seeal are exp
pected
to pressent.
Figure 3
Sri That prospect
p
and Chaiwan pro
ospects: N-S
S cross-sectio
on shows fau lt propagatio
on fold
play and horst structu
ure play with subcommerrcial gas show
wn in Pha No
ok Khao Form
mation
from the well Sri-Thatt-2 indicating
g potential petroleum
p
sysstem.
Figure 4
Phu Krata
ae prospect: the seismic p
profile showss Pha Nok Kh
hao within faault propagattion fold.
The crestt of the fold shows
s
karst ffeature due to
t uplifting and exposuree. An alternattive play
is high am
mplitude reflectors abovee purple horizon which is interpreted as Upper Triiassic
clastics deposited in alluvial-lacus
a
strine.
L4/5
57
L4/57 is located in Kalasin, Udonthanii and Sakon Nakhon provinces (Fig. 6). It covers
c
2
ea of 3,453.86 km .
the are
Wong and Kham
L4/57 cconsists of at least 3 prospects which are Phu Phra, That Phu W
Muang
g. The explo
oration pla
ay of thosee prospectss is the Upp
per Triassicc Kuchinara
ai
Group deposited in alluvial and lacusttrine during Upper Trriassic exteension. Due
e to its
r
m
e main risk
k in this areea. Howeve
er,
depositional enviironment, reservoirs
may be the
good ssource rockks and sealls are expeected. Furth
hermore, th
he result frrom the Ph
hu
Phra-1 well show
ws minor ga
as in the tig
ght Formattion. There
efore, it is a good
opporttunity for unconventi
u
onal field eexploration
n and deve
elopment.
Figure 5
Phu Phra prospect shows chaotic seismic featu
ure which is interpreted aas a slump unit. The
ndicates mino
or gas show in
i tight Form
mation (Uppe
er Triassic
result from the Phu Phra-1 well in
ai Group) wh
hich is uncon ventional fie
eld challenges.
Kuchinara
L5/5
57
L5/57 is located in Nakhon Phanom aand Sakon Nakhon prrovinces. Itt covers the
e area
2
42.70 km .
of 2,84
L5/57 cconsists of at least 4 prospects which are Kusuman (fig. 7), Phu
u Pek, Sako
on and
Na Kae
e. The explo
oration pla
ay of thosee prospectss is the Low
wer-Middlee Permian
carbon
nate reservo
oir of the Pha
P Nok Kh
hao Forma
ation (below
w purple h
horizon) sourced
by Upp
per Carbon
niferous Sri That Form
mation (ora
ange horizo
on) in the d
deeper parrt. From
the seissmic profile (fig. 7), the set of in
nversion fa
aults is app
parent. It deeformed th
he syn
extensiional packa
age as a ha
arpoon stru
ucture. The
e purple ho
orizon whicch has
disconttinuity and
d high amp
plitude refleectors is in
nterpreted as an unco
onformity caused
c
by uplifting. Also, this horizon is inter preted as the
t top of Pha Nok K
Khao Forma
ation
which e
exposed an
nd perform
med Karst-llike topogrraphy. Afte
er uplifting , the depositional
environ
nment had
d changed to lacustrin
ne and allu
uvial setting
gs which leed clastic units
u
deposited as inte
erpreted in the packa ge betwee
en purple and
a green h
horizon
(alternaative play)..
Figure 6
Kusuman
n prospect sh
hows the areaa of inversion
n evidenced by asymmettrical folding
(harpoon
n) and onlapp
ping. The syn
n-extension package
p
is interpreted as a Permian
carbonate
e (below purrple horizon) overlain by the clastic un
nit (above puurple horizon
n) which
is identified by high amplitude
a
refflectors.
L9/5
57
L9/57 is located in Chaiyaph
hum, Nong
g Bua Lamphu and Khon Kaen PProvinces. It
2
covers the area of
o 1,999.92 km .
L9/57 cconsists of at least 2 prospects which are Phu Wiang
g and Phu Khieo (fig.. 8). The
exploraation play of
o those prrospects iss the Lowerr-Middle Permian carrbonate reservoir
(blue h
horizon in fig.
f 8) of th
he Pha Nokk Khao Form
mation sou
urced by T riassic Kuchinarai
Group (yellow ho
orizon) and Upper Carboniferou
us Sri That Formation
n in the dee
eper
part. Frrom the se
eismic profiile (fig. 8), it shows th
he Pop-up shape whiich is called
d Dao
Ruang structure. This shape
e was causeed by a nu
umber of ep
pisodes off strike slip
n associated with com
mpression w
which led uplifting. In
n particulaar, the Perm
mian
motion
carbon
nate had be
een uplifted and parttially erode
ed. This carrbonate in Dao Ruang
structu
ure is dominated by dark
d
grey w
wackstoness and mode
erately-spaarsely
fossilife
erous. The presence of
o sand graain indicates a shoreline enviro
onment.
Moreovver, this structure has a potentiial petroleu
um system
m evidenced
d by gas sh
hown
(0.35 M
MMCF) in Permian
P
carrbonate fro
om Dao Ru
uang-1 well. The upliffting had
change
ed the depositional environmen
e
nt to lacusttrine and alluvial
a
in TTriassic. The
erefore,
the clastic unit ha
ad deposited and perrformed ass the seal over
o
Permiaan carbona
ate
reservo
oir. A numb
ber of upliffting episo
odes caused
d the series of Indosiinian
unconfformities (g
green and purple horrizons) whiich can be potential sstratigraph
hic
traps.
Figure 7
Phu Khieo
o prospect shows Pop-up
p shape asso
ociated with strike-slip
s
mo
otion. Pha Nok Khao
Formation (dark blue horizon) wass uplifted and partly erod
ded presentinng in Indosin
nian 1
unconforrmity (yellow horizon).Thee Dao-Ruang
g-1 well drille
ed to Pha No
ok Khao For
Formation showing 0.35 MMCF off gas sealed by Kuchinara
ai Group.
L10//57
L10/57
7 is located in Mahasa
arakham, U
Udonthani, Kalasin an
nd Khon Kaaen Provinces. It
2
covers the area of
o 3,651.67 km . The w
west and east
e
sides of
o this bloc k are the
producction areas (Nam Pho
ong and Do
ong Mun).
L10/57
7 consists of
o at least 4 prospectss which are
e Khao Sua
an Kwang, Kranuan, Nam
N
Phong and Dong
g Mun. The exploratio
on play of those
t
prospects is th e Lower-M
Middle
ha Nok Kha
ao Formation sourced
d by Uppe
er
Permiaan carbonate reservoiir of the Ph
Carbon
niferous Sri That Form
mation. Mo
oreover, the
e Triassic Kuchinarai
K
Group in the
t low
area caan be a sou
urce rock fo
or Pha Nokk Khao Forrmation in the high a rea.
In the K
Khao Suan Kwang an
nd Kranuan
n prospectss, Pha Nok Khao Form
mation wass
affected by thin-sskinned thrust. The d
deformation presente
ed in fault p
propagatio
on
g.
folding
Nam Pong prospect (fig. 9), thee seismic profile
p
show
ws inversio n (thick skinned
In the N
inversio
on?) evidenced by on
nlapping a nd thinning of syn-in
nversion paackage tow
ward
the fold
d. This inve
ersion prod
duced asym
mmetrical folding
f
and
d uplifting of Pha No
ok Khao
Formattion. The crest of the fold was tthen partly eroded du
ue to upliftt and expo
ose.
Moreovver, gravita
ational drivven led slu mp and cla
astic units deposited as seen in
n fig. 9.
In the D
Dong Mun
n prospect (fig. 10), th
he seismic profile sho
ows appareently exten
nsional
fault bllock. Within tilted fau
ult block, th
he low amplitude unit is interprreted as Ph
ha Nok
Khao FFormation. The top off Pha Nok Khao Form
mation (blue horizon) presented
d in
rough and discon
ntinuity refflectors wh
hich may re
epresent errosional su rface. Morreover,
this Pha Nok Kha
ao Formatio
on truncateed to the base
b
Khora
at Group w
which performed
stratigrraphic trap
p. The sourcce rock wh
hich is Sri That
T
Formation (orang
ge horizon
n) is
overlain by Pha Nok
N Khao Formation
F
and also tiilted by exttension.
Figure 8
Nam Pho
ong prospectt: the seismicc profile show
ws the area of
o inversion p
presented by
asymmettrical folding.. This inversio
on led Pha Nok
N Khao Forrmation (bluee horizon) up
plifting.
The crestt of the fold was
w then ero
oded resulting
g in absent of
o Pha Nok K
Khao Formation. at
the crest.. Moreover, uplifting
u
also
o led gravitational driven around the ccrest of the fold
which led
d slump unit deposited an
nd this could
d be an altern
native play.
Figure 9
Dong Mu
un prospect shows
s
the arrea of extension. Pha Nok
k Khao (blue horizon) wass tilted
trap. The hig
and trunccated to base
e Khorat Gro
oup forming stratigraphic
s
gh amplitude
e and
continuous reflector overlain
o
by P
Pha Nok Khao
o Formation is interpreteed as Sri Thatt
Formation (orange ho
orizon) which
h is the sourcce rock.
L11//57
L11/57
7 is located in Mukdahan, Kalasiin, Sakon Nakhon,
N
Kh
hon Kaen, M
Mahasarak
kam,
2
Udonth
hani and Roi
R Et provinces. It covvers the arrea of 2,950
0.96 km .
L11/57
7 consists of
o at least 4 prospectss which are
e Kuchinarai, Phon Th
hong, Bua Kao
and No
ong Pok. The exploration play o
of Kuchinarrai prospec
cts is the U
Upper Triasssic
Kuchinarai Group
p deposited
d in alluviaal and lacusstrine durin
ng Upper TTriassic exttension.
This Ku
uchinarai Group
G
can be
b a poten
ntial source
e for both of
o Kuchina rai play an
nd Pha
Nok Kh
hao play.
From the seismic profile of the Bua Kh
hao prospe
ect (fig. 11)), it illustra tes reef-lik
ke
feature
e developed on up th
hrown faultt below an unconform
mity (blue h
horizon).
Figure 1
10 Bua Khao
o prospect: it shows reef ffeature (Pha Nok Khao Fo
ormation?) w
which is expe
ected to
be a poro
ous zone for reservoir.
L12//57
L12/57
7 is located in Mukdahan and N
Nakhon Pha
anom prov
vinces. It co
overs the area of
2
1,575.4
40 km .
7 consists of
o at least 3 prospectss which are
e Mukdaha
an, Khampaalai and Th
hat
L12/57
Phanom
m. The exp
ploration play of Kham
mpalai and
d Mukdaha
an prospeccts (fig. 12) is the
Upper Triassic Ku
uchinarai Group
G
depo
osited in alluvial and lacustrine during Upper
Triassicc extension
n. The Muk
kdahan-1 w
well result shows
s
minor gas in TTriassic volccanic
sandsto
one of Kucchinarai Group. This i s a good in
ndication of
o potentiaal petroleum
m
system
m. In the ho
orst block (below purp
ple horizon
n) where th
he well did
d not encou
unter,
Pha No
ok Khao Fo
ormation may
m presen t observed
d from chao
otic and reeef-like refllectors.
Also, it is expecte
ed to be a porous
p
zon
ne. Therefo
ore, Pha No
ok Khao Fo
ormation iss likely
an alternative pla
ay.
Figure 1
11 Mukdaha
an prospect shows
s
asymm
metrical foldiing caused by inversion. TThe Mukdahan-1
well enco
ountered to volcanic
v
clasttic sandstone
e of Kuchinarrai Group (puurple horizon
n) with
some gass shown. The
e blue horizo n is interpretted as the ba
ase of Pha No
ok Khao Form
mation
due to re
eef-like feature.
L13//57
L13/57
7 is located in Khon Kaen,
K
Mahaasarakam, Buriram
B
an
nd Nakhon Ratchasim
ma
2
provincces. It cove
ers the area
a of 3,251.8
81 km .
L13/57
7 consists of
o at least 2 prospectss which are
e Manchak
kiri and Cho
onnabot. The
T
exploraation play of
o those prrospects iss the Lowerr-Middle Permian carrbonate reservoir
of the Pha Nok Khao
K
Forma
ation sourcced by Upp
per Carbon
niferous Srii That Form
mation.
hinarai Gro up in the low area ca
an be a sou
urce rock for Pha
Moreovver, the Triiassic Kuch
Nok Kh
hao Formation in the high area..
hao Forma
From the seismic profile of Chonnabo
ot prospectt (fig. 13), Pha
P Nok Kh
ation
(blue h
horizon) wa
as thrusted
d presentin g in imbriccated thrusst. These im
mbricated thrusts
t
are ove
erlain by Trriassic Kuch
hinarai Gro
oup which could be an
a alternatiive play.
Moreovver, the Ch
honnabot-1
1 well resu
ult from the
e adjacent area show
ws trace of gas
g at
the basse Khorat Group.
G
The
erefore, thee chance of success in this bloc k is potenttially
high.
Figure 1
12 Chonnab
bot prospect shows the im
mbricated thrrust of Pha Nok
N Khao Forrmation (blue
e
horizon). Moreover, the overlain u
unit (purple horizon)
h
is interpreted as a clastic unit and
can be an
n alternative play. This claastic unit stra
atigraphically
y pinches outt to the the base
b
Khorat Group. Therefo
ore, if hydroccarbon prese
ent, this pinching out cann be a potenttial trap.
L14//57
L14/57
7 is located in Roi Et, Mahasarakkam, and Kalasin
K
prov
vinces. It c overs the area
a
of
2
3,166.7
79 km .
L14/57
7 consists of
o at least 2 prospectss which are
e Yangtalatt and Mah asarakham
m. The
exploraation play of
o those prrospects iss the Upper Triassic Kuchinarai
K
G
Group dep
posited
in alluvvial and laccustrine during Uppe r Triassic extension.
e
From
F
the s eismic pro
ofile
(fig. 14
4), it shows apparently
y inversion
n resulting in asymme
etrical fold ing. Althou
ugh the
Yang T
Talat-1 welll
Figure 1
13 Yangtalatt and Mahasa
arakham pro
ospects show
w asymmetrical folding caaused by inve
ersion.
The Yang
gtalat-1 well encountered
e
d to Triassic Kuchinarai
K
Grroup (purple horizon) wh
hich was
likely a po
otential reservoir due to alluvial depo
osition.
L15//57
L15/57
7 is located in Roi Et, Mukdahan
n, Amnat Charoen and Yasothon
n province
es. It
2
covers the area of
o 3,207.24 km .
7 consists of
o at least 2 prospectss which are
e Nonsung
g and Hong
g Sang. The
e
L15/57
exploraation play of
o those prrospects iss the Upper Triassic Kuchinarai
K
G
Group dep
posited
in alluvvial and laccustrine during Uppe r Triassic extension
e
and the Low
wer-Middle
e
Permiaan carbonate reservoiir of the Ph
ha Nok Kha
ao Formation sourced
d by Uppe
er
Carbon
niferous Sri That Form
mation.
For the
e Nonsung prospect (fig. 15), th
he Non Sun
ng-1 well presents
p
off shale with
h 1.2%
of TOC
C content and
a also graded from
m dark at th
he base of the
t section
n to light grey
g
shale aat the top of
o section. This shale is interbed
dded with medium-g
grained
sandsto
ones. The upper
u
and lower of t he section contain bu
urrows, craacks and rip-up
clasts. T
The age off this intervval is likely Middle-La
ate Triassic. Thereforee, the paleo
o
environ
nment is in
nterpreted as a fluctu
uating of sh
hallow marrine to con
ntinental
environ
nment during that tim
me. In deep
per part, th
he well also
o penetrateed to the upper
u
part off carbonate
es, two coa
al seams (b
below yellow horizon)) and Si Th
hat Formatiion
which iis overall in
nterpreted as shallow
w marine to
o deltaic en
nvironmen
nt.
Figure 1
14 Non Sung
g prospect: the
t package between gre
een horizon and
a yellow ho
orizon is a potential
source an
nd reservoir defined
d
by w
well descriptio
on above. Th
he well path o
of the Non Sung-1
S
well was penetrated to
t a potentia l lacustrine source
s
rock.
L17//57
L17/57
7 is located in Chaiyap
phum, Kho
on Kaen and Nakhon Ratchasim
ma province
es. It
2
covers the area of
o 3,531.85 km .
L17/57
7 consists of
o at least 2 prospectss which are
e Bua Yai and
a Chaturrat. The
exploraation play of
o those prrospects iss the Lowerr-Middle Permian carrbonate reservoir
of the Pha Nok Khao
K
Forma
ation sourcced by Upp
per Carbon
niferous Srii That Form
mation.
In Bua Yai prospe
ect (fig. 16)), the blue horizon (b
bright and low
l
contin uity reflecttors) is
interpreted as the
e top Pha Nok
N Khao Formation
n which wass elevated by extensiional
faults.
Figure 1
15 Bua Yai prospect:
p
blue
e horizon is iinterpreted as
a the top of Pha Nok Khaao Formation due to
discontinuity and brig
ght reflector. The green horizon
h
is inte
erpreted as a base Khora
at Group.
L18//57
L18/57
7 is located in Khon Kaen,
K
Buriraam, Mahassarakham and
a Nakho n Ratchasima
2
provincces. It cove
ers the area
a of 3,366.3
31 km .
L18/57
7 consists of
o at least 2 prospectss which are
e Ta Lat Sai and Si Daa. The exploration
play off those pro
ospects is th
he Lower-M
Middle Perrmian carbonate reseervoir of the Pha
Nok Kh
hao Formation source
ed by Upp er Carboniiferous Sri That Form
mation. In Ta Lat
Sai pro
ospect (fig. 17), seismic profile sshows the extensiona
e
al structuree below gre
een
horizon
n (Indosinian II uncon
nformity?).. Discontinuity reflecttor in syn-eextensiona
al
packag
ge (between yellow horizon and
d purple ho
orizon) is in
nterpreted as the Pha
a Nok
Khao FFormation. In the horsst block, diiscontinuitty and non-stratified feature is likely
l
mound
d or carbon
nate platform which m
may be afffected by sea level ch
hange. Also
o, this
feature
e is assume
ed to conta
ain moderaate-high po
orosity and
d is likely a good rese
ervoir.
Figure 1
16 Ta Lat Sai prospect sh
hows promin
nent extensio
onal structure
e. In the horsst block, non-stratified with bright reflectors
r
is iinterpreted as
a a carbonatte platform w
which is likely
ya
potential reservoir.
L19//57
L19/57
7 is located in Roi Et, Mahasarakkham, Si Sa
a Ket and Yasothon
Y
p
provinces. It
I
2
covers the area of
o 3,643.11 km .
L19/57
7 consists of
o at least 4 prospectss which are
e At Samatt, Chaturap
phak Phima
an,
Kaset P
Pisai and Phatum Rat. The explo
oration play of those prospectss is the Upp
per
Triassicc Kuchinara
ai Group deposited in
n alluvial and lacustriine during Upper Tria
assic
extensiion. From the
t seismicc profile off the At Sam
mat prospe
ect (fig. 18)), inversion
n
producced an asym
mmetrical folding. Th
he package
e of syn-exxtension beetween blu
ue and
yellow horizon was deforme
ed and is i nterpreted
d as a Triassic clastic u
unit. This unit
u was
eroded due
e to uplifting resultin
ng in an un
nconformity
y (blue horrizon). Thus, this
partly e
unconfformity can
n be a strattigraphic trrap for Tria
assic clastic
c reservoir..
Figure 1
17 At Samatt prospect shows asymmeetrical folding
g caused by inversion. Brright reflecto
or
between blue and yellow horizonss is interpreted as a clastic unit (Traisssic Kuchinara
ai
Group?) which
w
is likely
y to be a pottential reservvoir and trapped by unco
onformity blu
ue
horizon).
L20//57
L20/57
7 is located in Ubon Ratchathan
R
ni provincess. It covers the area o
of 2,117.67
7 km2.
7 consists of
o at least 1 prospect which is Khemmarat
K
t. The explo
oration pla
ay of
L20/57
those p
prospects are
a the Upper Triassicc Kuchinarrai Group deposited
d
iin alluvial and
a
lacustriine during Upper Tria
assic exten
nsion and the
t Lower-Middle Perrmian carb
bonate
reservo
oir of the Pha
P Nok Kh
hao Formattion source
ed by Uppe
er Carboni ferous Sri That
Formattion. From the seismic profile o
of the Khem
mmarat pro
ospect (fig.. 19), it illusstrates
the defformation e. g. asym
mmetrical fo
olds produced by inversion. Thee package
ns was uplifted and partly
betwee
en purple and
a dark blue horizon
p
erod
ded producced an
unconfformity (green horizo
on which iss interprete
ed as Indossinian1). Th
his package
e is
interpreted as a Triassic
T
classtic unit wh
hich perforrms a pote
ential play. Also, the
indosin
nian 1 unco
onformity is
i likely a p
potential trrap.
Moreovver, the pa
ackage betw
ween darkk and light blue horizo
ons is interrpreted as a Pha
Nok Kh
hao Formation which is anotherr potential. The seism
mic profile ((fig. 19) shows
the darrk blue which is interpreted as a top of Ph
ha Nok Kha
ao Formatiion is partly
eroded
d showing truncation
t
to the Ind
dosinian 1 unconform
u
mity. This pllay is trapp
ped by
Indosin
nian 1 unco
onformity and
a also faault blocks.
Figure 1
18 Khemmarat prospect was affected
d by compresssion resultin
ng in uplifting
g and inversion
folding. Uplifting
U
caussed the locall erosion of the
t top Pha Nok
N Khao Fo
ormation (Dark and
light blue
e horizons) and perform a potential trrap. Also, uplifting led Triiassic clastic unit
which is a potential play (packagee between pu
urple and darrk blue horizzon) deposit and
a can
be trappe
ed by fault blocks.
L21//57
L21/57
7 is located in Nakhon
n Ratchasim
ma provincces. It cove
ers the areaa of 2,935.8
89 km2.
L21/57
7 consists of
o at least 2 prospectss which are
e Si Kew an
nd Don Ph rai. The
exploraation play of
o those prrospects iss the Lowerr-Middle Permian carrbonate reservoir
of the Pha Nok Khao
K
Forma
ation sourcced by Upp
per Carbon
niferous Srii That Form
mation.
In both
h prospectss, seismic profile
p
(fig.. 20) showss planar tiltted extens ional fault block
which p
produced horst and graben
g
geo
ometries. For
F the Pha
a Nok Khao
o play, it was
w
shorten
ning by imbricated th
hrusts whicch can be the
t trap for this play. The top of Pha
Nok Kh
hao Formation is marrked by lig ht blue horizon and the
t bottom
m of this
Formattion is marrked by darrk blue horrizon. The detachmen
nt layer of the imbriccated
thrustss may sit within Sri Th
hat Format ion (the pa
ackage bettween darkk blue and red
horizon
n).
Figure 1
19 Sikew and
d Don Phrai prospects seeismic profile
e illustrate the horst and g
graben geom
metries
and thin skinned thrust of Pha No
ok Khao play.. The top of Pha
P Nok Khaao is marked by light
blue horizzon and the bottom of P
Pha Nok Khao
o Formation is marked byy the dark blue
horizon. The
T imbricated thin-skinn
ned thrust is likely a pote
ential trap. Thhe package between
b
red and dark
d
blue horrizon is inter preted as a source
s
rock which
w
is Sri TThat Formatio
on.
L22//57
L22/57
7 is located in Si Sa Ke
et and Ubo
on Ratchathani provinces. It covvers the area of
2
3,608.9
92 km . L22
2/57 is very
y new field
d for the exxploration. The subsu
urface data in this
block iss still insuffficient and
d also no exxploration wells to clarify petro
oleum plays.