Natural gas sources, migration and accumulation in the shallow water area of the Panyu lower uplift: An insight into the deep water prospects of the Pearl River Mouth Basin, South China Sea |
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Authors: | Honghan Chen Changmin Chen Xiong Pang Jiahao Wang Wanzhong Shi |
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Affiliation: | aDepartment of Petroleum Geology, Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China;bThe Research Institute of East Oil Company, CNOOC, Guangzhou 510240, China |
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Abstract: | Although no drilling has been carried out in the deep water area of the Baiyun sag in the Pearl River Mouth Basin, South China Sea, the successful exploration for natural gas in the shallow water area of the Panyu lower uplift allows an insight into the prospectivity of the adjacent deep water fan system of the Baiyun sag. The Paleogene gas kitchen in the Baiyun sag provided both oil-derived gas and coal-derived gas. Fluid inclusion measurements and 2D numeric modelling of formation pressure indicate four episodes of hydrocarbon charge since the third release of the overpressure system. Seismic wipeout zones manifest several types of gas chimney which could play a role in vertical migration conduits to feed the natural gases into the deep water fan system. There would be, therefore, a low risk for hydrocarbon exploration in the deep water fan system. |
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Keywords: | Deep water fan system Fluid inclusion Gas chimney The Pearl River Mouth Basin |
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