东濮凹陷胡庆地区油气成藏期及成藏过程

Accumulation period and accumulation process of hydrocarbon in Huqing Area of Dongpu Depression

郝建光¹ 蒋有录² 刘景东² 房磊² 刘培²

中海石油（中国）有限公司深圳分公司研究院，广东 广州 510240 中国石油大学（华东）地球科学与技术学院，山东 青岛 266555

Research Institute of Shenzhen Branch of CNOOC Ltd., Guangzhou 510240, China College of Geosciences and Technology, China University of Petroleum, Qingdao 266555, China

在综合分析东濮凹陷胡庆地区油气成藏条件的基础上，采用流体包裹体均一温度法确定了研究区油气成藏的时间及期次，并结合烃源岩的生烃、排烃史以及圈闭发育史恢复了油气成藏过程。研究结果表明，东营组沉积晚期，沙三段烃源岩开始大规模生烃，油气主要通过连通砂体和断层由一台阶向三台阶运移，并最终在二台阶、三台阶上的沙三中和沙三下亚段地层中聚集成藏。随着东营末期地层抬升，研究区烃源岩生烃过程受到抑制，第一期成藏事件结束。明化镇组沉积晚期—现今，地层过补偿，沙三段烃源岩二次生烃过程明显，该时期断层已停止活动，生成的油气主要在一台阶沙三中、沙三下亚段地层中聚集成藏。

Based on the comprehensive analysis of the hydrocarbon accumulation conditions in Huqing Area of Dongpu Depression, this paper researches the hydrocarbon accumulation time and accumulation period through the use of homogenization temperature of fluid inclusion. Additionally, combined with the history of hydrocarbon generation and expulsion of source rocks and trap development history, the process of hydrocarbon accumulation is studied. The results show that the source rocks of Es3 member began to generate huge amounts of hydrocarbon in late Dongying Formation, which mainly migrated from the first step to the third step within connected sand bodies and along faults, and finally accumulated in Middle and Lower Es3 members on the second and third steps. With the uplifting of formations in late Dongying Formation, hydrocarbon generation of source rocks was restrained, and the first hydrocarbon accumulation event ended. From late Minghuazhen Formation to today, the formation was compensated excessively, and the secondary hydrocarbon generation of source rocks of Es3 member was obvious. Then all faults had stopped activity, and the hydrocarbon of this stage mainly accumulated in Middle and Lower Es3 members in the first step.

10.6056/dkyqt201301009