北部湾盆地海中凹陷油气成藏条件分析

Analysis of oil accumulation conditions in Haizhong Depression, Beibuwan Basin

孙建峰 须雪豪 席敏红

Sun Jianfeng Xu Xuehao Xi Minhong

中国地质大学(武汉)资源学院, 湖北武汉 430074; 中国石油化工股份有限公司上海海洋油气分公司研究院, 上海 200120

Faculty of Earth Resources, China University of Geosciences, Wuhan 430074; Institute of SINOPEC Shanghai Offshore Oil & Gas Company, Shanghai 200120

海中凹陷位于北部湾盆地西南部,其勘探程度低,对油气成藏条件欠缺系统的认识和深入的研究。以含油气系统理论为指导,在简要介绍地层与构造特征的基础上,重点论述了烃源岩、储集层、圈闭及输导介质等油气系统的基本要素,认为海中凹陷发育多套烃源岩、多套储集层、多种类型圈闭和复合的输导介质,具备油气系统形成的基本条件,具有较为广阔的油气勘探前景。

The degree of exploration of Haizhong Depression nowadays is low which is located in the southwest of Beibuwan Basin and petroleum accumulation conditions here needs to be understood and studied comprehensively. Based on the introduction of structure and formation characteristics, this paper emphasizes on the basic elements of petroleum system such as generating rocks, reservoirs, traps, and migration mediums. It is concluded that there are series of source rocks, reservoirs, kinds of traps and migration mediums developed in Haizhong Depression, which means it has pool forming conditions and cheerful prospect.