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Origin and accumulation of the oils from Bamianhe oilfield, Bohai Bay Basin, Eastern China

Science China Earth Sciences 2004年第Z2期47卷 177-189页

作者： PANG Xiongqi1,2, LI Sumei1,2, JIN Zhijun3, LI Maowen4, LI Pilong5 , LI Xue5 & BAI Guoping1,2 1. Key Laboratory of Hydrocarbon Accumulation, Ministry of Education, Beijing 102249, China 2. Basin & Reservoir Research Center, University of Petroleum, Beijing 102249, China 3. Sinopec Petroleum Exploration and Exploitation Institute, Beijing 100083, China 4. Geological Survey of Canada, Calgary T2L 2A7, Canada 5. Shengli Petroleum Exploration Bureau, Dongying 257015, China Key Laboratory of Hydrocarbon Accumulation Ministry of Education Beijing 102249 China Basin & Reservoir Research Center University of Petroleum Beijing 102249 China Sinopec Petroleum Exploration and Exploitation Institute Beijing 100083 China Geological Survey of Canada Calgary T2L 2A7 Canada Shengli Petroleum Exploration Bureau Dongying 257015 China

Utilizing basic principles and methodologies of geology and organic geochemistry, kinetics of hydrocarbons generation and accumulation, quantitative assessment of crude oils sourced from different source rocks, and hydrocarbons migration pathways for the oils from the Bamianhe oilfield, the Bohai Bay Basin, Eastern China are discussed. Results of oil-rock corre-lation showed that the oils were mainly derived from Es4 member (with buried depth >2700 m) of Niuzhuang and Guangli Sags within normal oil window though there is a little amount of mixed immature oils. Quantification of mixed oils with different sources indicated that mature oils ac-count for about 80% of the total oils discovered and immature oils for only 20%. Migration of the oils sourced from the sags is controlled by predominant hydrocarbons migration passages de-termined by faults, unformalities and favored sandstone reservoir. Results of the origin and mi-gration models for the oils have been recently further testified by considerable quantity of oils discovered in the Bamianhe area, which is obviously playing an important role in guiding further oil exploration.

关键词： Bamianhe oilfield, mixed oil, oil-rock correlation, oil migration, oil-pool forming dynamics.

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