Department of Petroleum Exploration

Potential Source and Seal in Cambodia

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Contents

v Prospective sedimentary basins of Cambodia

v Potential Source Rock

v Capacity Building Needs

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SedimentaryBasinsofCambodia

Basedonstructuralandtectonicfeatures,anumberofpoten4aloilandgasbearingbasinhavebeeninden4fiedinto8sedimentarybasinscapableofcontainingpetroleumthatareeitherwhollyorpar4allylocatedinCambodia.

1.  KhmerBasin2.  KompongSomBasin3.  MekongBasin4.  ChhungBasin5.  PreahBasin6.  TonleSapBasin7.  KhoratBasin

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Onshore Area - Potential

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Prospec5vesedimentarybasinsofCambodia

§  TheTonleSapBasinisthe

largestQuaternarybasinlocatedinnorthwesternCambodia,whichcovertheareaabout48,000km2.

§  TheMekongBasinlocatedin

thesoutheastoftheTonleSapBasin,andextendstowardtheoffshoreVietnam.

§  KompongSomBasin

n  OnshoreofCambodiacontainsanumberofQuaternaryandMesozoicsedimentarybasins,whichpromisethepossibilityofsubstan4alreservesofNaturalGasandmodestreservesofOil.

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Potential Source Rock A.Mainsourcearebelievedtocomprise;

ü KuchinaraiGr,Triassicorganicrichlacustrineshalesü LateCarboniferous/LowerPermianSiThatFmshallowmarineorganicshales,carbonatesandcoals.

ExamplesofPermianmicr5ccarbonates

B.BothsourcerockintervalsarepresentinPhuQuoc,KampongSomBasins,KoratBasin,,aswellasonshoreVietnam

Jurrasic-Cretacous Sanstone

Outcrop study of Cambodia

Sample TOC Type Ro Age Tmax

CoalyShale20101210-02B

1.02% IV 0.79 Triassic

Coal 77.27% I/II 0.84 Triassic

Shale20101205-01

0.12 I/II 1.26 Triassic

C1 high III Triassic

C2 low III Triassic

C3 good III Triassic

Overmature

Jurrasic-Cretacous Sanstone

Capacity Building Needs

ü DetailGeologicalSurveyü Mapping

Jurrasic-Cretacous Sanstone

Poten5alTriassicandPermiansource rockswillbemature foroilandgasoverlargepartofthebasinalareas.ü Poten5alSource:

•  Oil:LateTriassicorganicrichlacustrineshales.•  Gas:UpperCarboniferous–LowerPermianmarineshales.

Summary