Makassar Strait

Geographic Location: Between Borneo and Sulawesi Island

Hydrocarbon Potential: Gas and Oil

Main reservoir target: Deepwater unit of Miocene-Pliocene interval.

Main source rocks: Type III, land plant origin source rocks.

Seismic expression of an unconformity in the Makassar Strait (Source TGS)

Fold belts in the deepwater setting with some toe trusts. Source: TGS

North Sumatra Fore Arc Basin

Geographic Location: Northwest offshore of Sumatra Island.

Seismic expression:

Source: Western Geco, published in PESGB, 2008

Source: Western Geco, published in PESGB, 2008

Source: Western Geco, published in PESGB, 2008

Seram Trough

Geographic location: Eastern Indonesia, between Seram Island and West Papua.


Water depth: 20 to 500 meters water depth


Hydrocarbon potential: dominantly gas with oil.


Main reservoir target: ...Formation


Main reservoir facies: Miocene carbonate reef / build up.

Main source rock:


Seismic expressions:

Seismic source: Fugro




















Seismic source: Fugro

Tarakan Basin

Geographic Location: Northeast of Borneo Island

Water depth: Partly onshore, down to more than 3000 m

Hydrocarbon potential: Gas and Oil

Main reservoir target: Tarakan and Bunyu Formation (Pliocene and Upper Miocene interval)

Main reservoir facies: Deltaic setting

Main source rock: Type III source rock in the Miocene and older interval.

Seismic expression



Seismic section across the Tarakan, Bunyu and Ahus Arches in Lentini and Darman, 1997, IPA 25th conference proceedings.





















Seismic section showing foresets in the southern part of offshore Tarakan. Lentini and Darman, 1997, IPA 25th conference proceedings.

Natuna Basin

Geographic location: East Natuna basin, southern part of South China Sea, Northwest of Java Sea. Water depth: 50-200 m below mean sea level.

Hydrocarbon potential: Rich of gas with high CO2 content (up to 80%).

Main reservoir target: ...

Formation Main reservoir facies: Miocene carbonate reef / build up.

Main source rock:

Seismic expressions:

Seismic source: TGS Heimdall, Offshore Indonesia and Vietnam; in SEAPEX Press, No. 41, Vol. 8, Issue 3 Q3, 2005


Data source: TGS Website: www.tgsnopec.com/data_library/line_of_the_month_gallery/asia_pacific/indonesia_heimdall.asp