Sequence stratigraphic features of nonmarine Cretaceous sediments in Songliao basin, northeast China

Conference · Fri Mar 01 00:00:00 EST 1991 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:5681963

Hsu, Huaida ^[1]

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1. China Univ. of Geosciences, Beijing (China)

Abundant fossils indicate that Cretaceous siliciclastics of the Songliao basin were deposited in nonmarine environments. However, a relative lake-level curve constructed by the author is somewhat like the eustatic sea-level curve for this period published by Haq et al., 1987. Based on stratigraphic work, a revised definition of a supersequence is proposed. The composition of the lowstand system tract in the nonmarine sequence is different from its marine counterpart, such as the lowstand-prograding complex being absent in some sequences and the basin floor fan often replaced by the alluvial fan or evaporate. A sequence that juts across the reflection event, signified T{sub 2}, which separates the Aptian (Quantou Formation) and Albian (Qingshankou Formation) units, has been studied in detail. Numerous small symmetrical stair-like grabens, containing erosional and leveed channels, developed on top of the Quantou Formation. A number of oil reservoirs are related to channel sands, overbank sediments, and turbidite lobes that form a complex network over a large area east of the Daqing oil field. No shelf edge is present in the nonmarine facies tract, and the transgressive system tract is only developed on the western flank of the basin. Cores, well logs, high-resolution and three-dimensional seismic data, and seismic modeling have been studied from this area.

• OSTI ID: 5681963
• Report Number(s): CONF-910403-; CODEN: AABUD
• Journal Information: AAPG Bulletin (American Association of Petroleum Geologists); (United States), Vol. 75:3; Conference: Annual meeting of the American Association of Petroleum Geologists (AAPG), Dallas, TX (United States), 7-10 Apr 1991; ISSN 0149-1423
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
58 GEOSCIENCES
CHINA
SEDIMENTARY BASINS
PETROLEUM DEPOSITS
PETROLEUM GEOLOGY
SEISMIC SURVEYS
STRATIGRAPHY
ALLUVIAL DEPOSITS
CRETACEOUS PERIOD
FOSSILS
GEOLOGIC HISTORY
GEOLOGIC MODELS
RESERVOIR ROCK
ASIA
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
GEOLOGY
GEOPHYSICAL SURVEYS
MESOZOIC ERA
MINERAL RESOURCES
RESOURCES
SURVEYS
020200* - Petroleum- Reserves
Geology
& Exploration
580000 - Geosciences