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| Mass transport deposits and its significance for oil & gas exploration in deep water regions of South China Sea |
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WANG Da wei1,2, WU Shi guo1,2, LÜ Fu liang3, WANG Bin3
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(1.Key Laboratory of Marine Geology & Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2.Marine Oil & Gas Research Center,Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;3.Hangzhou Institute of Petroleum Geology, PetroChina, Hangzhou 310013, China)
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| Abstract: |
| Based on the geophysical identification characteristics, by the high resolution deep water 2D and 3D seismic data, the mass transport deposits (MTDs) were found in the deep water formations of the South China Sea, which includes Qiongdongnan Basin, Baiyun Sag and Brunei. The sediment model of MTDs was built, and its significance for deep water oil and gas exploration was discussed. The results show that MTDs are characterized by low amplitude, chaotic and translucent seismic reflection. And they are easy to form many sedimentary structures such as normal fault, thrust fault, pressure ridge and fold. The typical MTDs can be divided into three sections such as tensional head, compressive body and toe. MTDs are mainly mud rich sediments and can usually be as excellent cover,and form deep water trap cooperation with turbidity system. A little fraction of sand prone MTDs can be a potential reservoir. |
| Key words: South China Sea deep water mass transport deposits system sediment model seismic identification characteristics |
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