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South Sumatra Basin Province, Indonesia; the Lahat/Talang Akar-Cenozoic total petroleum system

Open-File Report 99-50-S

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Abstract

Oil and gas are produced from the onshore South Sumatra Basin Province. The province consists of Tertiary half-graben basins infilled with carbonate and clastic sedimentary rocks unconformably overlying pre-Tertiary metamorphic and igneous rocks. Eocene through lower Oligocene lacustrine shales and Oligocene through lower Miocene lacustrine and deltaic coaly shales are the mature source rocks. Reserves of 4.3 billion barrels of oil equivalent have been discovered in reservoirs that range from pre-Tertiary basement through upper Miocene sandstones and carbonates deposited as synrift strata and as marine shoreline, deltaic-fluvial, and deep-water strata. Carbonate and sandstone reservoirs produce oil and gas primarily from anticlinal traps of Plio-Pleistocene age. Stratigraphic trapping and faulting are important locally. Production is compartmentalized due to numerous intraformational seals. The regional marine shale seal, deposited by a maximum sea level highstand in early middle Miocene time, was faulted during post-depositional folding allowing migration of hydrocarbons to reservoirs above the seal. The province contains the Lahat/Talang Akar-Cenozoic total petroleum system with one assessment unit, South Sumatra.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
South Sumatra Basin Province, Indonesia; the Lahat/Talang Akar-Cenozoic total petroleum system
Series title:
Open-File Report
Series number:
99-50
Chapter:
S
Edition:
-
Year Published:
2000
Language:
ENGLISH
Description:
19 p.