期刊
JOURNAL OF EARTH SCIENCE
卷 20, 期 1, 页码 124-135出版社
CHINA UNIV GEOSCIENCES, WUHAN
DOI: 10.1007/s12583-009-0014-3
关键词
deepwater reservoir; source rock; petroleum system; northern South China Sea
资金
- National Basic Research Program of China [2007CB411703]
- CAS Knowledge Innovation Program [KZCX2-YW-203]
- National MIR Petroleum Resource Strategic Target Survey and Evaluation Program
- Taishan Scholarship Program of Shandong Province
The northern South China Sea margin has experienced a rifting stage and a post-rifting stage during the Cenozoic. In the rifting stage, the margin received lacustrine and shallow marine facies sediments. In the post-rifting thermal subsidence, the margin accumulated shallow marine facies and hemipelagic deposits, and the deepwater basins formed. Petroleum systems of deepwater setting have been imaged from seismic data and drill wells. Two kinds of source rocks including Paleogene lacustrine black shale and Oligocene-Early Miocene mudstone were developed in the deepwater basin of the South China Sea. The deepwater reservoirs are characterized by the deep sea channel rill, mass flow complexes and drowned reef carbonate platform. Profitable capping rocks on the top are mudstones with huge thickness in the post-rifting stage. Meanwhile, the faults developed during the rifting stage provide a migration path favourable for the formation of reservoirs. The analysis of seismic and drilling data suggests that the joint structural and stratigraphic traps could form giant hydrocarbon fields and hydrocarbon reservoirs including syn-rifting graben subaqueous delta, deepwater submarine fan sandstone and reef carbonate reservoirs.
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