#18 PETRONAS PETRONIC PETROLEUM RESOURCE EXPLORATION CREDIT SUISSE MERGUI-NORTH SUMATRA BASIN MALAYSIA Intel TRONAS AN OVERVIEW#28 PETRONAS LOCATION OF CROSS-BORDER STUDY - th Line of Configura SUMATRA THIS MAPS COMPLED FROM NUMEROUS SOURCES SOME OF WHOHANE AT SLIGHTLY DIFFERENT LEVELE THE WELL INFORMATIONISTINCOMPETE THE MAP SHOULD NOT BE USED FOR PRESS LOCAT LANGKAN Northern Graben PENANG BLAND Block PM320 PENINSULAR MALAYSIA Hala Lumpur Malaka PETROLEUM RESOURCE EXPLORATION Map Showing Location of the basin, overlain on Basement Structure Map#38 PETRONAS GENERAL STRATIGRAPHY DATE DECEMBER NORTHWESTERN AREA, STRAITS OF MELAKA SCHEMATIC CHRONOSTRATIGRAPHIC CHART OF 2.32 Приг IN IN AGE IN MA PERIOD/EPOCH FORAM ZONE PR. ZONE LATE OCE L PLIDCEM LATE DUGOCENE BELUMAI MEILLE MIDCENE LATE MOCEN - OLIGG INST GLENBAL SEA LEVEL INHO EUTAPANG SEURULA N SUMATRA BASIN EQUIVALENT PARAFKT BELUMAT GLOBAL SEQUENCE SEQUENCE WEST PETROLEUM RESOURCE EXPLORATION Langgun Timur-1 INDONESIA MALAYSIA DAYANGHI LANG GUN TIMUNIT TH 1939 CEL Fort To IB3.8 jundifferentiated, not mapped) TH3.7 TB3T TB3.8 TB36/37 1B34 T33 1032 TB3.1 TB2.6 102:5 TH24 1832/33 Dayang-1 NON-DEPOSITION/EROSION Keutapang T87.3 TB2 223 BAONG SST TB2.2 TB21 GREEN SEQUENCE TB14 TB1.3 -2 101.2 ORANGE SEQUENCE TBT.1 TALS PRE-TERTIARY BALEMENT BELUMAI LST NON-DEPOSITIONEROSION BAMPO SHALES NON-DEPOSITION/EROSION Perapat sst 7 Basement Tampur Carbonate MSS-XA-1 NON-DEPOSITION/EROSION Undiferentiated Basement EAST#48 PETRONAS MERGUI BASIN UNOCAL MERGUI UNOCAL PHANGHA W9-D-1 W 10,000- MERGUI RIDGE 10,000- 15,000 VERTICAL EXAGGERATION = 35% CENTRAL HORST PETROLEUM RESOURCE EXPLORATION NORTH SUMATRA BASIN (Northen Extension) ESSO W9-B-1 Ina M'sia PLACID YALA No.1 E RANONG RIDGE KEUTAPANG [Middle Miocene) BAONG (Middle Miocene) MERGUI SHELF BELUMAI [Early Miocene) (Late Oligocene) BAMPO T/OIL WINDOW (120° C) T/PRIMARY MIGRATION [155 C & 20% GAS GENERATION) PRETERTIARY METASEDIMENTS STRUCTURAL CROSS-SECTION OF MERGUI-NORTH SUMATRA BASIN#58 PETRONAS Exploration History (Malaysian Side) MOBIL (1971-1975) PETRONA PETROLEUM RESOURCE EXPLORATION Acquired 5500 km of 2D seismic and drilled 2 wells - MSS-AX and MG-AX. CREDIT SUISS ➤ Both wells tested potential Pre-Tertiary Tampur Carbonate basement plays. Good reservoirs were encountered at both wells but failed due to lack of top seal. (intel PETRONAS acquired 2000 km of 2D seismic data in 1983. ETRONAS#68 PETRONAS PETROLEUM RESOURCE EXPLORATION SUN MALAYSIA PETROLEUM (1987-1992) ➤ Acquired 5657 km 2D seismic and drilled 3 exploration wells in the Western most part of the block. ➤ Singa Besar-1 and Langgun Timur-1 had minor gas shows and the third well, Dayang-1 was dry. CREDIT SUISSE ➤ The acreage was relinquished in December 1992 upon the expiry of the exploration period. SHELL (1999-2001) (intel Acquired and processed 1053 line-km 2D seismic data. ➤ Re-processed 1000 line-km vintage 2D seismic data. ➤ Conducted a regional study of the Straits of Melaka comprising evaluation of the hydrocarbon habitat and tectonic framework. 2002 onwards-no exploration activities.#78 PETRONAS DIS-M High Des SUMATRA THAILAND MALAYSIA LANGKAWI ISLANDS PETROLEUM RESOURCE EXPLORATION Location of Exploration wells on Malaysian side Singa Besar-1 Dayang-1 Langgun Timur-1 OMSS-AX 09014 NORTH PENANG GRABEN Structural Map of Mergu-North Sumatra Basin- Tertiary Basement NORTH PM320 Tamiang SUMMATRA SIN MOAN CENTRAL GRASEN MG-AXC பச் MALAYSIA INDONESIA ASAHAN ARCH PUZZ SOUTHERN GRABEN 10 106#88 PETRONAS OF EXPLOR PETROLEUM RESOURCE EXPLORATION SUMMARY OF EXPLORATION WELL RESULTS Operator Yeared TD (m) Well MSS-XA Mobil Objectives Results 1972 1294 PETRO Calcarenites and Dry sandstones below Baong Shale EDIT SUISSE MG-XA Mobil 1974 1651 Synrift graben fill reservoirs Dry Dayang-1 Sun 1989 1142 Melaka carbonate/ Bampo Formation Singa MALA Sun 1989 844 Besar-1 Langgun Sun JA! 1989 2028 Timur-1 Dry. Trace Gas/oil shows Melaka Carbonate on top of basement Tampur Carbonate and Middle Graben Fill clastics 3.3m NGS, Flowing at 3.7MMSCF/day Minor gas shows TD in Tampur carbonates#98 PETRONAS PETROLEUM RESOURCE EXPLORATION Prospectivity and Challenges PETRONA ✰ Previous evaluation shows that there are four remaining potential hydrocarbon plays in the area namely: CREDIT SUISSE 1) Baong transgressive sandstones-main risk is top seal by Baong shales (intel 2) Stratigraphic onlap trap of Baong sandstone onto basement-main risk is top seal by Baong shales and lateral seal by basement, M3) Mioce 3) Miocene carbonate build-up/reef-main risk is the top seal. 4) Pre-Tertiary basement high (Tampur carbonates)-main risk is the reservoir. 5) Synrift play (Parapat sandstone)-main risk is the maturity of local source rocks#108 PETRONAS CREDIT SUISSE PETRONA (intel The End MALAYSIA TRONAS PETROLEUM RESOURCE EXPLORATION#118 PETRONAS Figure 3.31: Criteria Used for Defining Group Tops of PM320 SEISMIC SEISMIC ATTRIBUTES SEQUENCE AGE Basement Pre-Tertiary Poor resolution - Internal configurations or patterns not very distinct Orange Late Oligocene Reflectors show moderate continuity and moderate amplitudes. Green Early Miocene Reflectors are moderate to high continuity and moderate to high amplitudes. Tb2.2/2.3 PETROLEUM RESOURCE EXPLORATION LOG ATTRIBUTES DEPOSITION OF ENVIRONMENT DESCRIPTION DEPTH Tampur Carbonate 1410m Time equivalent to Bampo/Parapat formation (claystone, mudstone, shale). Continental deposits of sandstone, conglomerate and claystone. Syn-rift graben-fill deposit. 1180m Time equivalent to the Belumal formation. Marine Influence, predominantly mudstone with interbedded limestone and sandstone. Post-rift upper graben-fill 1103m Late Early Middle Miocene Parallel reflectors show generally high amplitudes with moderate to high continuity In general, top of reflector shows strong reflector top. On some lines, erosional cuts are clearly visible. Good correlation between log and seismic, marking the start and end of sandy interval.. Shelf platform environment- middle neritic Alternating sandstone and shale On lapping onto underlying Green sequence. Distinct erosional features visible. Biostratigraphy indicates an age gap of 9 Ma between Tb2.2/2.3 to TB3-2/3.3. Clear strong unconformity is observed, indicating possible sub-aerial exposure. 956m Tb3.2/3.3 Middle-Late Miocene Tb3.5 Early Pliocene Parallel reflectors with low to moderate amplitudes, with moderate to high continuity. Parallel to sub-parallel relatively continuous reflector, moderate amplitudes. High gamma ray values indicate deeper environment of deposition than Tb2.2/2.3 Predominantly shale with silty sands. Mid Neritic On-lapping onto Tb2.2/2.3 and minor erosional truncations at the top, 881m Shaly deposits, in shallow outer entic Lies conformably over 795m Tb3.2/3.3.#128 PETRONAS PETROLEUM RESOURCE EXPLORATION T CHRONO STRATIGRAPHY LITHOSTRATIGRAPHY SUPER CYCLES SW NE TIME IN MM YEARS Landward Gloon Relative Change of Coastal Onlap Valstal. 19771 Band IN MM YEARS SYSTEM SERIES MALAGGA PLATFORM Ma 1.0 0 QUARTER NARY PLEISTO- 0.7 CENE 1.3 1.66 1.55 3.50 5.20 10 20 16.20 NEOGENE MIOCENE MICOLE LATE PLIO. CENE 2.B F JULU PAYEU SEURULA 3.50 EHI 4.2 5.20 8.8 KEUTAPANG BAONG MALACCAS 10.5 98 10.20 13 145 155 145 18.20 SSB/SSPC DEPT DATE DRAW NO DAS 111 : June 1995 FPD-CLA PENINSULAR MALAYSIA REVIEW BLOCKS PM320, PM321 AND PM322 THE STRAITS OF MALACCA GENERALISED STRATIGRAPHY OF 3 Fig. No. 20 25.20 R * TERTIARY EARLY PALEOGENE OLIGOCENE BELUMAI BAMPO. MARINE CLASTICS PARAPAT FM 2 GRABEN FILL EARLY LATE PRE-TERTIARY PARA PALEOCENE EOCENE ABSENT BASEMENT TB 1 TB2 8 A4 NA 225 20 24 25.20 26 29 2:0 3 10 T T T#138 PETRONAS MALAYSIA ETRONA PETROLEUM RESOURCE EXPLORATION NWWW C PRESENT DAY INDONESIA MALAYSIA DOBA THEE LATE MIOCENE KELITAPANI BAR FAULT BARONG ARUN LIMESTONE MEMBER MIDDLE MIOCENE BANG UMESTION BAUMG UPADEN MALACCA PLATROFEN MALAGA LIMESTONE MEMBEF EARLY MIOCENE ARUN LIMESTONE MEMBER OLIGOCENE Source from Davies 1984, Muhady 1982, Mobl SSB / SSPC 'T : EPD-GLA ΤΕ June 1998 W NO DRS1114308PGA CENTRAL CRASH TAUPUR CARBONATE OCEME OR PRETERSWAY GENTIF GRABEN PENINSULAR MALAYSIA REVIEW BLOCKS PM320, PM321 AND PM322 SCHEMATIC SEDIMENTATION HISTORY OF THE NORTH SUMATRA BASIN Fig. No 6#148 PETRONAS ICE ANDAMAN SEA THAILAND, INDONESIA J2 NORTH AREA WITH SMALL RECREAND ALL STRUCTURES LOWER GOANG GANDSTONES GRAPES IN OVERLYING CLASTICH IDE THAILAND MALAYSIA VERY SPECULATIVE UPDIP STRATIGRAPHIC TRAPS IN LOWER BAONG SANDSTONES BLOCK PM320 #700 MEGA MALACCA SUMATRA PLATFORM MALAYSIA intel ETRONAS HKAN REEF FAIRWAY TEMIANG DEEP DISCOVERIES OUTSIDE BLOCK PM1 100 ME 15100 MMB UR-15 MMB F with k BASIN NEXA BLOCK PM321 AREA GRÅBEN STRAITS OF MALACCA ASAHAN ARCH PULAU LANGKAWI PETROLEUM RESOURCE EXPLORATION PULAU PINANG VERY SPECULATIVE? PRE-TERTMAY CHUMPHON (THAILAND) BAGIN THE PLAY BLOCK PM322 50 km Yung Volcani Tertiary Pre Tony UF-600 OF Older cue facka ignon Ch Cartonale Area (Arun Linestate in west Top Pre Tyson TWT) SSB/SSPC DEPT : EPD-GUA DATE DRAW NO June 1998 DRS111440098CA PENINSULAR MALAYSIA REVIEW BLOCKS PM320, PM321 AND PM322 PLAY MAP BLOCKS PM320 AND PM321 Fig. No. 7#158 PETRONAS Location PM320 THAILAND PETROLEUM RESOURCE EXPLORATION KUALA TRENGGANU MALAYSIA ETRONA PM322 PENINSULAR MALAYSIA KUALA LUMPUR KERTEH#168 PETRONAS General Geology LETRONI PETROLEUM RESOURCE EXPLORATION PM320 is situated on the Northwest flank of Straits of Malacca and constitutes a shelfal extension on the North Sumatra Basin (NSB). NSB comprises of Tertiary sediments over pre-Tertiary metasedimentary complex. NSB is a part of the hydrocarbon-rich series of Tertiary back-arc basin chain of the Sunda Island arc. ✰ NSB was formed during the early tertiary (Eocene - Oligocene) as a series of alternating N-S trending structural highs (horst) and deeps (grabens). NSB consist of Tertiary sediments overlying pre-Tertiary sedimentary complex. ✰ PM320 Basement consists of predominantly Pre-Tertiary carbonates (Tampur Formation). Basement occurs at about 2000m in the half grabens and in the west and rises gently towards the east and northeast.