东海西湖凹陷含油气系统特征  

CHARACTERISTICS OF OIL AND GAS BEARING SYSTEM IN XIHU LAKE DEPRESSION IN THE EAST CHINA SEA

作　　者：顾惠荣[1] 贾健谊[2] 叶加仁[2] 

机构地区：[1]上海海洋石油局,上海200120 [2]中国地质大学,湖北武汉430074

出　　处：《石油与天然气地质》2002年第3期295-297,306,共4页Oil & Gas Geology

基　　金：国家"九五"重点科技攻关成果

摘　　要：东海西湖凹陷自晚白垩纪以来 ,经历了 3个发展阶段 ,形成了平湖组花港组、花港组和始新统 3套含油气系统 ,其中 ,前两套为已知系统 ,后者为推测系统。两套已知系统的烃源岩现今均处于成熟阶段 ,花港组含油气系统的盖层自南而北封闭性变差 ,其中南部的油气勘探更具现实意义。综合分析表明 :平湖组花港组含油气系统的关键时刻在距今 7Ma左右 ,花港组含油气系统在距今 1 6 4Ma左右。Xihu lake depression in the East China Sea has gone through three stages of development since the late Cretaceous, forming three sets of oil and gas systems of Pinghu Formation Huagang Formation, Huagang Formation and Eocene, the former two sets are -known systems, the latter system is a conjectured one. Hydrocarbon source rocks in these two systems are in the stage of maturation. The closure of oil and gas bearing roof rocks in Huagang Formation deteriorates from southward towards northward and the south part with real meaning for oil and gas exploration. \{Comprehensive\} analyses indicate that the key moment for oil and gas bearing system in Pinghu Foprmation and is about 7 M a, oil and gas bearing system in Huagang Formation is about 1.64 M a.

关 键 词：含油气系统 分布 东海西湖凹陷 特征 油气地质 

分 类 号：P618.13[天文地球—矿床学] TE12[天文地球—地质学]