The Brief Exploration History and Petroleum Geology of the ... Thailand Presentation.pdfSeismic Data The seismic data consist of more ... UNOCAL KATHU-1 W8/38 06-Dec-97 10-Dec-97 DRY

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


Location Map of the Study AreaLocation Map of the Study Area

20o

Source: DMF, Thailand, 2005

0o

, ,


120o100o

Study Area

Seafloor Geometry


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


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


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



1 Exploration History1. Exploration History



4. Challenges

5. Conclusion


Basin Architecture

N


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


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


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


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


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


g9) Miocene Conglomerate reef

Petroleum Play TypePetroleum Play Type

Angular unconformity


Tertiary Isochorn Map of the Mergui BasinTertiary Isochorn Map of the Mergui Basin



1 Introduction and Exploration History1. Introduction and Exploration History



4. Challenges

5. Conclusion


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


-- 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


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


Documents

The Brief Exploration History and Petroleum Geology of the ... Thailand Presentation.pdfSeismic Data The seismic data consist of more ... UNOCAL KATHU-1 W8/38 06-Dec-97 10-Dec-97 DRY