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NORTH SUMATERA -MERGUI BASINS:The Role of Geological Setting and Hydrocarbon potentiale o e o Geo og ca Sett g a d yd oca bo pote t a

(Indonesia Team; EPPM Launching Seminar, Bangkok, October 9-10, 2008)

GEOLOGICAL SETTINGGEOLOGICAL SETTINGOFOFOFOF

NORTH SUMATERANORTH SUMATERA

Sumatera-Malaya Terrains

(Hutchinson, 1994)(Hutchinson, 1994)

(Cameron and Pulunggono, 1984)(Cameron and Pulunggono, 1984)

THE ROLE OF GEOLOGICALTHE ROLE OF GEOLOGICALTHE ROLE OF GEOLOGICALTHE ROLE OF GEOLOGICALSETTING & PETROLEUM POTENTIALSETTING & PETROLEUM POTENTIAL

SUMATERA (WESTERN INDONESIA)SUMATERA (WESTERN INDONESIA)SUMATERA (WESTERN INDONESIA)SUMATERA (WESTERN INDONESIA)

Sumatera/Western IndonesiaTectono stratigraphyTectono-stratigraphy

1. 1. SynSyn--rift and Associated Riftrift and Associated Rift--valley Fill valley Fill DepositionDeposition (Eocene(Eocene--Oligocene)Oligocene)DepositionDeposition (Eocene(Eocene--Oligocene)Oligocene)

2. 2. ‘‘PostPost--rift’ Transgressive Phase Depositionrift’ Transgressive Phase Deposition(Oligocene(Oligocene--Early Miocene) Early Miocene) (Oligocene(Oligocene Early Miocene) Early Miocene)

3. 3. SynSyn--orogenic Regressive Phase Depositionorogenic Regressive Phase Deposition(Middle Miocene(Middle Miocene--Present)Present)(Middle Miocene(Middle Miocene Present)Present)

Sumatera/Western Indonesia Tertiary Basin DevelopmentTertiary Basin Development

Paleogene PhasePaleogene Phase::RiftRift--valley Basin Formationvalley Basin Formation

Neogene PhaseNeogene Phase::Neogene PhaseNeogene Phase::Compressive Basin Formation: ForeCompressive Basin Formation: Fore--arc and Backarc and Back--arc Basinsarc Basinsarc Basinsarc Basins

Sumatera/Western Indonesia /Paleogene Basin Development

Rifting And RiftRifting And Rift--valley Basinsvalley BasinsRifting And RiftRifting And Rift--valley Basins.valley Basins.Collisions And Foreland Basins.Collisions And Foreland Basins.S bd iS bd i iiSubduction, ForeSubduction, Fore--arc Basins.arc Basins.

Western Indonesia Paleogene Basins

Western Indonesia Neogene Basin

North Sumatera-Mergui Basins, Thai Sector Well Results(Andreason, et al., 1997)

A30 Ma

B16 Ma

A

BASIN EVOLUTION

B

(Andreason, et al., 1997)

C13 Ma

D5 Ma

C

B

(Andreason, et al., 1997)

A B

A

PALEOGEOGRAPHY AND LITHOFACIES

(Andreason, et al., 1997)B

C D

C

B(Andreason, et al., 1997)

Anonym (2008)

Generalized Stratigraphy of North Sumatera Basin (Hakim, et al., 2007)( , , )

PETROLEUM SYSTEMPETROLEUM SYSTEM

Petroleum System of North Sumatera Basin (Hakim, et al., 2007)

Petroleum System of Mergui-North Sumatera Basins(Andreason, et al., 1997)

Productive petroleum Systems of SE Asia-Australasia(Howes, 1997)

Productive petroleum systemsSE Asia-Australia showing Dominant facies and in-placeDominant facies and in-place petroleum resources(Howes, 1997)

O & G RESERVEDO & G RESERVEDFOR INDONESIAFOR INDONESIAFOR INDONESIAFOR INDONESIA

OIL RESERVED OF INDONESIAStatus 1 January 2007

Oil Reserved (MMSTB)

Source: Ditjen MIGAS 2008

GAS RESERVED OF INDONESIAGAS RESERVED OF INDONESIA

Total GasProven = 106.01 TSCFPotential = 58.98 TSCFTOTAL = 164.99 TSCF

FUTURE AND PROGRAMFUTURE AND PROGRAM

More detailed study and research on G G explorationsMore detailed study and research on G-G explorationsand developments in the North Sumatera-Mergui Basins.

Thus, it will open a challenge to enhance for newhydrocarbon discoveries in the near future.