石油实验地质2017，Vol.39Issue(2)：186-194,9.DOI:10.11781/sysydz201702186
异常高压与油气充注的耦合性——以东海陆架盆地西湖凹陷花港组和平湖组为例
Coupling of abnormal overpressure and hydrocarbon charging:A case from the Huagang and Pinghu formations of Xihu Sag, East China Sea Shelf Basin
摘要
Abstract
Abnormal overpressure in the Huagang and Pinghu formations of the Xihu Sag, East China Sea Shelf Basin was studied based on sonic logging data, organic geochemistry and fluid inclusion testing. The abnormal pressure mainly originated from the lower Huagang Formation, and featured a"step type"distribution in the Xihu Sag. The top interface of high pressure becomes older from the Pinghu tectonic zone to the central inversion structural belt and from the edge to the center of the sag. Conductive overpressure due to the injection of high pressure fluid developed in the study area, and corresponds to good oil and gas reservoirs, which showed that the development of abnormal pressure and hydrocarbon charging had consistency in space. The evolution process of residual formation pressure was simulated using the basin simulation software, indicating that Miocene (15-7 Ma) and Pliocene to Quaternary (3-0 Ma) were the two key periods of residual formation pressure. Hydrocarbon charging history showed that hydrocarbon charging took place twice in the middle-late Miocene and the early Pliocene, which indicated that the development of abnormal pressure and hydrocarbon charging had consistency in time. Therefore, the abnormal overpressure of the Huagang and Pinghu formations coupled in time and space with hydrocarbon charging.关键词
异常高压/油气充注/花港组/平湖组/西湖凹陷/东海陆架盆地Key words
abnormal overpressure/hydrocarbon charging/Huagang Formation/Pinghu Formation/East China Sea Shelf Basin分类
能源科技引用本文复制引用
陈智远,徐志星,陈飞,徐国盛,张武..异常高压与油气充注的耦合性——以东海陆架盆地西湖凹陷花港组和平湖组为例[J].石油实验地质,2017,39(2):186-194,9.基金项目
中海油上海分公司重点项目( CCL2014SHPS0014RSI)资助. （ CCL2014SHPS0014RSI）
