The Brief Exploration History and Petroleum Geology of the Mergui-North Sumatra Basin Thailand Mergui-North Sumatra Basin, Thailand By: Tananchai Mahattanachai DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Contents of Presentation Contents of Presentation 1 Exploration History 1. Exploration History 2. General Geology & Hydrocarbon Potential gy y 3. Current Activities 4. Challenges 5. Conclusion DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Location Map of the Study Area Location Map of the Study Area o 20 Source: DMF, Thailand, 2005 , , o 0 Study Area o o 100 120 DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Seafloor Geometry DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Exploration History Seismic Surveys in the Andaman Sea Operator Block Duration 2D (km) Amoco W2 1974 452.00 DMR Andaman Sea 28 Apr-23 May 1995 3,298.00 ESSO ESSO W9 W9 1974 1975 1974-1975 11 785 00 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 29 Nov 1996 11 Feb Unocal W8/38, W9/38 1997 11,737.00 Weeks W1 1973 910.00 Seismic Data Shell The seismic data consist of more T t l Total 44 873 80 44,873.80 than 1,000 seismic lines, with total length of about 45,000 km. Magnetic Survey in the Andaman Sea covering the area of Block W7/38, Kerr- W9/38 and A4/43 (W8/38). McGee W7/38 1998 3,820.40 DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Exploration History WELL NAME BLOCK SPUD DATE RELEASE DATE RESULT 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 UNOCAL TRANG-1 TRANG 1 W8 W8 11-Mar-76 11 Mar 76 28-May-76 28 May 76 GAS&OIL SHOWS 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 PLACID YALA-1 YA A W8 W8 20 S 20-Sep-76 76 20 O 20-Oct-76 76 GAS SHOWS 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 DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Exploration History Manora-1 Payang-1 Phangha-1 Trang-1 Tai-1 Mergui- 1 Surin-1 W9-B-1 W9-A-1 W9-D-1 W9 D 1 Ranot-1 W9-C-1 Kra Buri-1 Kathu-1 Sikao-1 Yala-1 W9-E-1 Thalang-1 Kantang-1 DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Contents of Presentation Contents of Presentation 1 Exploration History 1. Exploration History 2. General Geology & Hydrocarbon Potential gy y 3. Current Activities 4. Challenges 5. Conclusion DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Basin Architecture N DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Stratigraphic Correlation of the Mergui and N-Sumatra Basin Relative Changes of Relative Changes of MERGUI MERGUI MERGUI sea level NORTH SUMATRA AGE BEICIP-FRANLAB (EXXON 1979) BASIN BASIN - + 1996 present sea level Holocene Pleistocene Pleistocene JULU RAYEU TAKUA PA TAKUA PA L Pliocene SEURULA M P E KEUTAPANG THALANG L THALANG BAONG BAONG Miocene e M TRANG TRANG PEUTU YANG ANG BELUMAI NG ARUN TAI TAI PAYAN KANTANG KANTA PAY TAI E BAMPO U YALA cene M L L L Oligoc M M PARAPAT major unconformity E minor unconformity DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Plate Motions and Simplified Structural Framework Plate Motions and Simplified Structural Framework of Cenozoic Basins in the Gulf of Thailand and the Andaman Sea of Cenozoic Basins in the Gulf of Thailand and the Andaman Sea Legend Legend 90 o 95 o 100 o 105 o South East Andaman FZ East Andaman FZ China Sea Sagiang FZ Sagiang FZ 15 o 15 o Sumatran FS Sumatran FS Bangkok Bangkok Ranong FZ Ranong FZ Ranong FZ Ranong FZ Khorat Plateau Khorat Plateau Mergui FZ Mergui FZ 10 o Andaman Basin Andaman Basin 10 o Gulf Gulf of of Thailand Thailand Thailand Thailand Mergui Mergui - - North Sumatra North Sumatra Study Area Basin Basin Study Area Thrust 5 o Spreading 5 o Indian Oceanic Plate Indian Oceanic Plate Indian Oceanic Plate Indian Oceanic Plate N Normal Fault l F l Strik-Slip Fault Sunda Continent Sunda Continent Mergui Basin Lineament N Offshore area Offshore area 200 km 0 100 Plate Motion Plate Motion Plate Motion Plate Motion 90 o 95 o 100 o 105 o (Modified after Polachan, (Modified after Polachan,1988 1988) ) DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Physiographic Map of the Mergui Basin, Andaman Sea Physiographic Map of the Mergui Basin, Andaman Sea 97° 99° W7 7/ /38 38 W8 8/ /38 38 W9 9/ /38 38 8° = Low Area = High Area MALACCA SHELF MALACCA SHELF 6° = Concession Block of Study Area 97° 99° Source: Unocal Andaman (Thailand), Polachan 1988, and DMR’s Petroleum Concession Map offshore Thailand, 2000 DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Seismic Vertical Sections across the Northern, the Central, and the Southern areas. W E Mergui FZ Mergui FZ a) A Mergui Ridge Mergui Shelf Central High B A W E Western Mergui Sub-basin Eastern Mergui Sub-basin b) N Mergui Ridge Isochron Map Central High Mergui Shelf Top Oligocene-Basement Top Oligocene Basement B NW SE c) Seabed Seabed Top Upper Miocene Top Upper Miocene UMU UMU Ranong Ridge SIMF SIMF2 2 Mergui Shelf SIMF SIMF1 1_ _5 5 Central High SIMF1 SIMF SIMF1 SIMF Ranong Fault R F l C Seismic Basement Seismic Basement DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Petroleum Source Rocks Petroleum Source Rocks Depth vs. RO RO 0 . 5 1 . 5 0 1 2 0 2000 OI vs. HI 500 Type I 4000 450 400 Thalang Depth 6000 350 Kantang Thalang-1 Kra Buri 300 Ranot-1 Type II Manora-1 HI 250 Kantang-1 Kantang 1 8000 Kra Buri-1 200 Yala-1 150 Type III 100 10000 50 0 0 100 200 300 400 500 600 12000 OI DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Conceptual Play Types in the Mergui Basin Conceptual Play Types in the Mergui Basin W E 7 , 7 9 7 8 8 2 3 2 , , 4 6 2 1 5 No scale Stratigraphic Traps Stratigraphic Traps St Structural Traps t l T 5) Oligocene Basin Floor Fan 1) Drape over Basement High of Lower Oligocene Deltaic sand 6) Pinch-out of Lower Oligocene Deltaic sand 2) Roll-over of Upper Oligocene sand 7) Lower Miocene Carbonate Buildups 3) Crest of block of Oligocene sand 8) Mid-fan Turbidite of Lower Miocene sand 4) Drag fold of Lower Miocene sand g 9) Miocene Conglomerate reef DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Petroleum Play Type Petroleum Play Type Angular unconformity DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Tertiary Isochorn Map of the Mergui Basin Tertiary Isochorn Map of the Mergui Basin DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Contents of Presentation Contents of Presentation 1 Introduction and Exploration History 1. Introduction and Exploration History 2. General Geology & Hydrocarbon Potential gy y 3. Current Activities 4. Challenges 5. Conclusion DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Exploration Activities Block A Exploration Activities Block A4 4, A , A5 5 & A & A6 6/ /48 48 - Acquiring Acquiring 2 2D Seismic D Seismic Block Block Area (Km2) Area (Km2) - G&G studying G&G studying G&G t d i G&G t d i A 4/48 20,280 - Prospect area ranking Prospect area ranking A 5/48 25,270 A 6/48 / 23,270 , A 4/48 A 5/48 A 6/48 - Feasibility Studying Feasibility Studying DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Physiographic Map of the Mergui Basin, Andaman Sea Physiographic Map of the Mergui Basin, Andaman Sea 97° 99° W7 7/ /38 38 W8 8/ /38 38 W9 9/ /38 38 8° ? ? = Low Area = High Area MALACCA SHELF MALACCA SHELF 6° = Concession Block of Study Area 97° 99° Source: Unocal Andaman (Thailand), Polachan 1988, and DMR’s Petroleum Concession Map offshore Thailand, 2000 DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Challenges Challenges 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 water and New Oil Era and New Oil Era DMF, Thailand, EPPM-CCOP, 9-10 October 2008
Conclusions Conclusions 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. Petroleum charging from source to traps is expected 3 P l h i f i d and needed to be carried on the study 4. Challenging in petroleum field development DMF, Thailand, EPPM-CCOP, 9-10 October 2008
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