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The Brief Exploration History and Petroleum Geology of the
Mergui-North Sumatra Basin ThailandMergui-North Sumatra Basin, Thailand
By: Tananchai Mahattanachai
DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Contents of PresentationContents of Presentation
1 Exploration History1. Exploration History
2. General Geology & Hydrocarbon Potentialgy y
3. Current Activities
4. Challenges
5. Conclusion
DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Location Map of the Study AreaLocation Map of the Study Area
20o
Source: DMF, Thailand, 2005
0o
, ,
DMF, Thailand, EPPM-CCOP, 9-10 October 2008
120o100o
Study Area
Seismic Surveys in the Andaman Sea
Exploration History
Operator Block Duration 2D (km)
Amoco W2 1974 452.00
DMR Andaman Sea 28 Apr-23 May 1995 3,298.00
ESSO W9 1974 1975 11 785 00ESSO W9 1974-1975 11,785.00
Kerr-McGee W7/38 19 Apr - 10 May 1998 3,875.50
9-19 Feb 1999 1,332.30
Oceanic W7 1974 2,097.00
Pan Ocean W3,W4 1970, 1972 1,390.00
Placid Oil W8 1985 834.00
Union Oil W8 1973 7,163.00
29 Nov 1996-11 Feb
Seismic Data
The seismic data consist of more
Unocal W8/38, W9/3829 Nov 1996 11 Feb
1997 11,737.00
Weeks W1 1973 910.00
Shell
T t l 44 873 80than 1,000 seismic lines, with total length of about 45,000 km. covering the area of Block W7/38, W9/38 and A4/43 (W8/38).
Total 44,873.80
Magnetic Survey in the Andaman SeaKerr-McGee W7/38 1998 3,820.40
DMF, Thailand, EPPM-CCOP, 9-10 October 2008
WELL NAME BLOCK SPUD DATE RELEASE DATE RESULT
Exploration History
OPERATOR
ESSO W9-A-1 W9 15-Dec-75 01-Mar-76 DRY
ESSO W9-B-1 W9 04-Mar-76 22-Mar-76 GAS&OIL SHOWS
ESSO W9-C-1 W9 01-Jun-76 01-Sep-76 DRY
ESSO W9-D-1 W9 03-Aug-76 02-Sep-76 DRY
ESSO W9-E-1 W9 05-Sep-76 13-Nov-76 DRY?
UNOCAL TRANG-1 W8 11-Mar-76 28-May-76 GAS&OIL SHOWSUNOCAL TRANG 1 W8 11 Mar 76 28 May 76 GAS&OIL SHOWS
UNOCAL TAI-1 W8 28-May-76 28-Jun-76 DRY
UNOCAL PHANGHA-1 W8 30-Jun-76 13-Jul-76 DRY
UNOCAL MERGUI-1 W8 16-Jul-76 02-Sep-76 OIL SHOWS
UNOCAL PAYANG-1 W8 04-Sep-76 17-Sep-76 DRY
UNOCAL SURIN-1 W8 20-Sep-76 02-Oct-76 DRY
UNOCAL THALANG-1 W9/38 11-Oct-97 29-Oct-97 DRY
UNOCAL KANTANG-1 W8/38 25-Oct-97 05-Nov-97 DRY/
UNOCAL KRA BURI-1 W9/38 06-Nov-97 23-Nov-97 DRY
UNOCAL SI KAO-1 W8/38 05-Nov-97 03-Dec-97 DRY
UNOCAL KATHU-1 W8/38 06-Dec-97 10-Dec-97 DRY
PLACID YA A W8 20 S 76 20 O 76 GAS SHOWS
DMF, Thailand, EPPM-CCOP, 9-10 October 2008
PLACID YALA-1 W8 20-Sep-76 20-Oct-76 GAS SHOWS
PLACID RANOT-1 W8 28-Jan8-7 18-Feb-87 DRY
KERR-McGEE MANORA-1 W7/38 22-Feb-00 13-Mar-00 DRY
Exploration History
Manora-1
Payang-1
Surin-1
W9 D 1
Trang-1Phangha-1
Mergui- 1 Tai-1
W9-B-1W9-A-1
W9-D-1
Thalang-1 Kantang-1
Yala-1
Kra Buri-1Kathu-1
W9-C-1Ranot-1
W9-E-1
Sikao-1
DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Contents of PresentationContents of Presentation
1 Exploration History1. Exploration History
2. General Geology & Hydrocarbon Potentialgy y
3. Current Activities
4. Challenges
5. Conclusion
DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Relative Changes of
Stratigraphic Correlation of the Mergui and N-Sumatra Basin
MERGUIAGE
Relative Changes ofsea level
(EXXON 1979)
present sea level+ -Pleistocene
Holocene
NORTH SUMATRABASIN
MERGUIBASIN
MERGUIBEICIP-FRANLAB
1996
Plio
cene
Pleistocene
JULU RAYEUSEURULA TAKUA PA
EM
L TAKUA PA
eP
KEUTAPANG
BAONG
THALANGL THALANG
Mio
cene BAONG
PEUTU
ARUN BELUMAI
TRANG
TAI
M
YAN
G
NG
AN
G
TRANG
cene
BAMPO
KANTANGTAI
YALA
EM
L
PAY
U
L
TAI
PAYA
N
KA
NTA
M
DMF, Thailand, EPPM-CCOP, 9-10 October 2008
major unconformity
minor unconformityOlig
oc PARAPAT
EM L
Plate Motions and Simplified Structural Framework Plate Motions and Simplified Structural Framework of Cenozoic Basins in the Gulf of Thailand and the Andaman Seaof Cenozoic Basins in the Gulf of Thailand and the Andaman Sea
East Andaman FZEast Andaman FZ SouthChina
90o 95o 100o 105oLegendLegend
Ranong FZRanong FZ
Sumatran FSSumatran FS
Sagiang FZSagiang FZSea
15o15o
BangkokBangkok
Mergui FZMergui FZ
Ranong FZRanong FZ
Andaman BasinAndaman Basin
Khorat PlateauKhorat Plateau
10o 10oGulf Gulf of of
ThailandThailandMergui Mergui -- North SumatraNorth SumatraBasinBasin
Study Area
Indian Oceanic PlateIndian Oceanic Plate5o
5o
Thrust
Spreading
N l F l
ThailandThailand
Study Area
Indian Oceanic PlateIndian Oceanic Plate
Sunda ContinentSunda Continent
Plate MotionPlate Motion
Offshore areaOffshore area0 100 200km
N
Normal Fault
Strik-Slip Fault
LineamentMergui Basin
DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Plate MotionPlate Motion90o 95o 100o 105o
(Modified after Polachan,(Modified after Polachan,19881988))
Physiographic Map of the Mergui Basin, Andaman Sea Physiographic Map of the Mergui Basin, Andaman Sea
97° 99°
WW77//3838
WW88//3838 WW99//3838
8°
MALACCA SHELF= High Area
= Low Area
DMF, Thailand, EPPM-CCOP, 9-10 October 2008Source: Unocal Andaman (Thailand), Polachan 1988, and DMR’s Petroleum Concession Map offshore Thailand, 2000
MALACCA SHELF6°
97° 99°
= Concession Block of Study Area
Seismic Vertical Sections across the Northern, the Central, and the Southern areas.
A
W Ea) Mergui FZMergui FZ
BAA
Central High
Mergui ShelfMergui Ridge
Isochron Map Top Oligocene-Basement
NN
W Eb)
Mergui ShelfMergui Ridge Central High
Eastern Mergui Sub-basinWestern Mergui Sub-basin
Top Oligocene Basement
NW SEc)
BB
Mergui ShelfRanong Ridge
R F lCentral High
SIMFSIMF11
SIMFSIMF22SIMFSIMF11__55
UMUUMU
SeabedSeabedTop Upper MioceneTop Upper Miocene
DMF, Thailand, EPPM-CCOP, 9-10 October 2008
CCRanong Fault SIMFSIMF11
Seismic BasementSeismic Basement
Petroleum Source RocksPetroleum Source Rocks
Depth vs. RO
0 0.5 1 1.5 2
RO
0
2000OI vs. HI
450
500
Type I 4000
250
300
350
400
HI
Thalang-1Ranot-1Manora-1Kantang-1
Type II
6000D
epth
ThalangKantangKra Buri
100
150
200
Kantang 1
Kra Buri-1Yala-1
Type III
8000
10000
DMF, Thailand, EPPM-CCOP, 9-10 October 2008
0
50
0 100 200 300 400 500 600
OI 12000
Conceptual Play Types in the Mergui BasinConceptual Play Types in the Mergui Basin
EW
4
778
23
7
6
89
2
,
512 , ,
St t l T Stratigraphic Traps
No scale
Structural Traps1) Drape over Basement High of Lower Oligocene Deltaic sand2) Roll-over of Upper Oligocene sand3) Crest of block of Oligocene sand4) Drag fold of Lower Miocene sand
Stratigraphic Traps5) Oligocene Basin Floor Fan6) Pinch-out of Lower Oligocene Deltaic sand7) Lower Miocene Carbonate Buildups8) Mid-fan Turbidite of Lower Miocene sand
DMF, Thailand, EPPM-CCOP, 9-10 October 2008
g9) Miocene Conglomerate reef
Petroleum Play TypePetroleum Play Type
Angular unconformity
DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Tertiary Isochorn Map of the Mergui BasinTertiary Isochorn Map of the Mergui Basin
DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Contents of PresentationContents of Presentation
1 Introduction and Exploration History1. Introduction and Exploration History
2. General Geology & Hydrocarbon Potentialgy y
3. Current Activities
4. Challenges
5. Conclusion
DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Exploration Activities Block AExploration Activities Block A44, A, A5 5 & A& A66//4848
Block Block Area (Km2)Area (Km2)-- Acquiring Acquiring 22D SeismicD SeismicG&G t d iG&G t d i A 4/48 20,280
A 5/48 25,270A 6/48 23,270
-- G&G studyingG&G studying-- Prospect area rankingProspect area ranking
/ ,
A 4/48
A 5/48A 6/48
DMF, Thailand, EPPM-CCOP, 9-10 October 2008
-- Feasibility StudyingFeasibility Studying
Physiographic Map of the Mergui Basin, Andaman Sea Physiographic Map of the Mergui Basin, Andaman Sea 97° 99°
WW77//3838
WW88//3838 WW99//3838
8°
?MALACCA SHELF
= High Area
= Low Area
?
DMF, Thailand, EPPM-CCOP, 9-10 October 2008Source: Unocal Andaman (Thailand), Polachan 1988, and DMR’s Petroleum Concession Map offshore Thailand, 2000
MALACCA SHELF6°
97° 99°
= Concession Block of Study Area
ChallengesChallenges
1. Quantitative Petroleum potential assessment 1. Quantitative Petroleum potential assessment
2. Additional Resource in the north
3. Strengthen academic connection among geo-scientists
4. New exploration technology in deep waterand New Oil Eraand New Oil Era
DMF, Thailand, EPPM-CCOP, 9-10 October 2008
ConclusionsConclusions
1. Reviewing of exploration history indicates petroleum potential in this area
2 Outstanding petroleum reservoir was noticed by 2. Outstanding petroleum reservoir was noticed by amount of sedimentary supply
3 P l h i f i d3. Petroleum charging from source to traps is expectedand needed to be carried on the study
4. Challenging in petroleum field development
DMF, Thailand, EPPM-CCOP, 9-10 October 2008