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Apichart Jeenagool and Tananchai Mahattanachai

Department of Mineral Fuels, Ministry of Energy, Thailand

Thailand Unconventional Oil and Gas Project:

Study for the prediction of shale resources

CCOP-KIGAM Unconventional Oil and Gas Project: Mapping of Black Shale Formations for the Prediction of Shale resources

Sokha Angkor Resort, 7-8 March 2016, Siem Reap, Cambodia

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Triassic Sakon Basin-DEM

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Stratigraphic Column and Petroleum System Lithostratigraphy

PHU TOK FM.

Indosinian I Orogeny

C a r b .

& O l e r

BASEMENT

Himalayan Orogeny

T e r t i a

r y C r e t

a c e o u s

J u r

a s s i c

T r i a s s

i c P e r

m i a n

L a t e C

a r b .

THA CHANG FM.

KHOK KRUAT FM. PHU PHAN FM. SAO KHUA FM.

MAHASARAKHAM FM.

PHRA WIHAN FM. PHU KRADUNG FM.

NAM PHONG FM. Indosinian II Orogeny

PHA DUA NAM DUK

HUA NA KHUM PHA NOK KHAO

SI THAT

K h o

r a t G

r o u p

Conventional Petroleum System Reservoir Seal Source Maturity

Karsted limestone Late /Over mature oil

Early mature oil

Immature oil

Karsted limestone Dolomite

Poor

Poor

Good

Good Poor

Mid mature oil

Unconventional Reservoir Source

(taken from Booth & Sattayarak, 2011 and added)

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Triassic Sakon Basin

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Triassic Sakon Basin

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Interpretation of Key Horizon for Black Shale Mapping

Near Base Khorat TWT

Black Shale Formation

Recoverable Resource

Maximum thickness 1,500 m.

Minimum thickness 200 m.

173 km2

738 km2

1,752 km2

PP-1

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Ø  Thick source rocks Ø  Lean to moderate source rocks quality Ø  Triassic and Permian age Ø  Active Petroleum System Ø  Thermally matured/Over Matured, gas prone Ø  High Pressure Underneath Khorat Group Ø  Uncertainty of entrapment mechanism Ø  Qualifying Opportunities for Unconventional

Petroleum Resources Exploration Thickness of

Source TOC% Mineral

Comp. Maturity

(Ro) Over

Pressure Depositional

Envir.

Up to 1,500 m 1.2 – 3.7 N/A 0.9 – 2.5 Yes Non-Marine

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Station 2: Km. 4+200 Hwy#2216 UTM:WGS84 0792781 1847630

Station 3: Km. 2+400 Hwy#2216 UTM:WGS84 0792370 1845666

Station 4: Km. 2+400 Hwy#2216 0796699 1850916

Sample Location

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