东海西湖凹陷第三系油气运聚分析

Petroleum Migration and Accumulation in Tertiary for Xihu Sag, East China Sea

杨风丽 何将启 江兴歌 刘津宁

YANG Feng-li HE Jiang-qi JIANG Xing-ge LIU Jin-ning

同济大学 海洋与地球科学学院, 上海 200092; 中国石化 石油勘探开发研究院 无锡实验地质研究所, 江苏 无锡 214151

School of Ocean and Earth Science, Tongji University, Shanghai 200092, China; Wuxi Research Institute of Experimental Petroleum Geology, SINOPEC, Wuxi 214151, China

针对东海西湖凹陷第三系经历的陆内拉张断陷-转换边缘拗陷-陆内迁移拗陷-弧后扩张的陆架边缘四种原型迭加改造的四个阶段和过程,使用TSM盆地模拟软件系统对其油气运聚特征进行了动态模拟和分析。结果表明:西湖凹陷的油气运移与构造运动密切相关,龙井运动期的构造反转是控制西湖凹陷油气运移成藏的关键时期和关键因素;西湖凹陷的的油气运移方向主要是西部斜坡带和中央背斜带;油气除了在西湖凹陷聚集成藏之外,还有可能向周边地区运移。

Xihu sag, East China Sea passed through four superimposed and reformed phases in Tertiary. This paper modeled and analyzed the dynamic process of petroleum migration and accumulation using TSM Basin Modeling System. The result would be summarized as following:1. Regional tectonic movement is closely related with oil and gas migration, 2. Structure reversion of Longjing movement is the key factor and period for oil and gas migration and accumulation, 3. Western slope and central anticlinal zone are main direction of oil and gas migration, 4. Oil and gas could migrate to circumferential zone except Xihu sag.

https://doi.org/10.3969/j.issn.1008-2336.2003.z1.006