中南大学学报（自然科学版）2013，Vol.44Issue(7)：2801-2811,11.
恩平凹陷中央断裂构造带超压发育及成藏意义
Overpressure forming and its effect on petroleum accumulation in central faulted structural belt of Enping depression, China
摘要
Abstract
With observed pressure of drills,phenomena of gas chimney and prediction from shale acoustic travel time and seismic data,overpressure forming and its effect on petroleum accumulation in central faulted structural belt of Enping depression were studied.In the longitudinal direction,two reservoir pressure systems were identified:Normal compaction-normal pressure system in Enping and upper formation and uncompacted-overpressure system in Wenchang formation.On vertical,overpressure is mainly distributed in EP17 sag,secondly in EP18 sag.The main driving mechanism of overpressure is hydrocarbon,and disequilibrium compaction is the minor factor.Overpressure has little effect on thermal degradation of kerogens,but it improves the performance of deep reservoir to some extent,strengthens the capability to seal gas and produces micro-fissure for hydrocarbon expulsion.Under the control of overpressure,oil and gas accumulate mainly in Wenchang and Enping formations.Wenchang reservoirs are characterized by near-source accumulation,self-generating and self-preserving.These advantages make it a favorable strata for petroleum explorations.关键词
恩平凹陷/超压/气烟囱/不均衡压实/油气成藏Key words
Enping depression/ overpressure/ gas chimney/ disequilibrium compaction/ hydrocarbon accumulation分类
能源科技引用本文复制引用
吴娟,叶加仁,施和生,舒誉,陈胜红,梁波..恩平凹陷中央断裂构造带超压发育及成藏意义[J].中南大学学报（自然科学版）,2013,44(7):2801-2811,11.基金项目
国家科技重大专项资助项目(2011ZX05023-001) （2011ZX05023-001）
中央高校基本科研业务费专项资助项目(CUGL100246) （CUGL100246）
