The far east hydrocarbon habitat - the charge perspective

Conference · Wed Sep 01 04:00:00 EDT 1993 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:6848773

Doust, H ^[1]

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1. Shell Intern. Petroleum Mij., Den Haag (Netherlands)

From a hydrocarbon exploration point of view, the Far East is typically the realm of Tertiary basins with youthful prospects. Nearly all of the oil and gas in these basins is terrestrial in origin and the current cycle of tectonic development began in late Mesozoic-early Tertiary history during which much of what is now east and southeast Asia consisted of a large land area comprised of microcontinental blocks welded together by fold belts. In the Paleogene, this continental area was subjected to back-arc extension and collapse as a consequence of complex plate readjustments. Subsidence took place in fault-bounded (graben) depressions throughout the area and widespread lacustrine environments were established. The middle to late Tertiary history of these basins was dictated by their proximity to the open ocean and by the extent of crustal subsidence, but follows a transgressive-regressive cycle that gives rise to the following groups of plays: (1) early Tertiary transgressive clastics, basically oil prone, (2) Miocene carbonates of the maximum transgression, gas prone, and (3) late Tertiary regressive clastics, oil and gas prone. The mechanisms of generation and migration in Far East Tertiary basins were poorly understood and the type and volumes of hydrocarbons trapped often appear to be unpredictable. At present, three basic depositional realms are envisaged for source rock accumulation: (1) lacustrine grabens ([open quotes]deep lakes[close quotes]) that contain rich algal-SOM type I-II source rocks and are oil prone, (2) paralic coal and coaly shale swamps, developed in a variety of onshore deltaic environments; charge from these source rocks is variable, and (3) coastal and marine, especially related to deltas where terrestrial organic material is introduced, accumulates, and is bacterially degraded and preserved. The distribution and types of hydrocarbons produced from these source rocks and their relations to hydrocarbon habitat are reviewed.

• OSTI ID: 6848773
• Report Number(s): CONF-9310237--
• Conference Information: Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Journal Volume: 77:9
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
ASIA
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATES
CENOZOIC ERA
COAL
DISTRIBUTION
ENERGY SOURCES
EXPLORATION
FOSSIL FUELS
FUELS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
GEOLOGIC STRUCTURES
HYDROCARBONS
MATERIALS
MATURATION
MESOZOIC ERA
MIGRATION
MINERAL RESOURCES
NATURAL GAS DEPOSITS
ORGANIC COMPOUNDS
ORIGIN
OXYGEN COMPOUNDS
PETROLEUM DEPOSITS
RESOURCES
ROCKS
SEAS
SEDIMENTARY BASINS
SEDIMENTARY ROCKS
SHALES
SOURCE ROCKS
SURFACE WATERS
TECTONICS
TERTIARY PERIOD