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《Journal of Chengdu University of Technology(Science & Technology Edition)》 2008-02
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Study on hydrocarbon migration and accumulation of Member 4 of Shahejie Formation in Bonan sag,Zhanhua depression,China

XU Xing-you,XU Guo-sheng,QIN Run-senState Key Laboratory of Oil and Gas Reservoir Geology and Exploration,Chengdu University of Technology,Chengdu 610059,China  
Bonan sag is an oil-enriched subsag in Zhanhua depression,Jiyang depression.Member 4 of Shahejie Formation(Es4) has great potential for oil and gas exploration.Based on the known research on the oil-source rock in Es4 and phrases of hydrocarbon infilling,the paper analyzes the characteristics of subsidence,formation and evolution of the temperature-pressure system.On the background of the two phrases of hydrocarbon infilling,the oil and gas in Es4 experienced three important periods to accumulate: Dongying period,namely the first phrase of infilling;Guantao period,namely the second phrase of early infilling;Minghuazhen period,namely the second phrase of late infilling.The process of accumulation was controlled by energy system,especially the fast-growing pressure had a crucial influence on hydrocarbon accumulation in Es4.The process of accumulation conformed to the law: pressure-buoyancy driving,fault-sand transportation,short distance migration and traping,and late accumulation from multiple sources.
【Fund】: “十五”国家科技攻关项目(2003BA613A-02)
【CateGory Index】: P618.13
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