Seismic reflection characteristics and depositional model of carbonate platforms in Xisha sea area

MA Yu-bo; WU Shi-guo; GU Ming-feng; LU Yin-tao; DONG Dong-dong; ZHAO Han-ting

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MA Yu-bo, WU Shi-guo, GU Ming-feng, LU Yin-tao, DONG Dong-dong, ZHAO Han-ting. Seismic reflection characteristics and depositional model of carbonate platforms in Xisha sea area[J]. Haiyang Xuebao, 2010, 32(4): 118-128.

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Seismic reflection characteristics and depositional model of carbonate platforms in Xisha sea area

1.
Institute of Mineral Resources,Chinese Academy of Geological Sciences, Beijing 100037,China
2.
Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
3.
Hangzhou Research Institute of Petroleum Geology, Petrochina, Hangzhou 310023, China

Received Date: 2009-12-01

Abstract

Abstract

Xisha area subsided along with the seafloor spreading of the South China Sea, carbonate platform and different types of reef began developed from Early Miocene in this area. Based on the seismic analysis, reefs in Xisha area show high-amplitude moundy continuous reflection at the top and the bottom, chaotic reflection inside the reef, carbonate platform shows high-amplitude continuous sub-parallel reflection at the top and a partly obscure bottom boundary, the internal reflection shows high-amplitude reflection interbedded with weak-amplitude reflection. Based on the stratigraphic sequence analysis in Xisha area and the seismic interpretation, the development of Xisha carbonate platforms was mainly controlled by the basement structure at the early stage and then mainly controlled by the relative sea-level fluctuation, so Xisha carbonate platforms experienced several development stages such as initial establishment stage, aggradation stage, exposure stage and flooding stage. The complicated development process makes the carbonate reservoir to have favorable reservoir properties and hydrocarbon potential.
- Xisha area,
- reef,
- carbonate platform,
- deep-water hydrocarbon,
- depositional model

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References(31)

References

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