惠州凹陷惠西地区油气成藏过程  

Hydrocarbon accumulation process in western Huizhou sag

作　　者：吴倩倩[1,2] 叶加仁[2] 施和生 舒誉 吴娟[4] 

机构地区：[1]中国石化胜利油田分公司西部新区研究中心,山东东营257000 [2]中国地质大学(武汉)构造与油气资源教育部重点实验室,湖北武汉430074 [3]中海石油(中国)有限公司深圳分公司研究院,广东广州510240 [4]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059

出　　处：《东北石油大学学报》2013年第6期32-41,7,共10页Journal of Northeast Petroleum University

基　　金：国家科技重大专项(2011ZX05023-001)

摘　　要：为研究惠州凹陷惠西地区油气成藏过程,应用油气成藏过程理论,利用含油气盆地数值模拟方法模拟研究区4口虚拟井烃源岩的生排烃史,根据流体包裹体显微荧光观测和均一温度测定资料,结合地层埋藏史恢复成果,确定研究区油气充注期次及时间.研究结果表明,惠西地区文昌组烃源岩在中始新世进入生烃门限,在渐新世—中中新世达到生烃高峰;恩平组烃源岩在早中新世末—晚中新世初进入生烃门限,在中中新世—现今达到生烃高峰.该地区存在2期油气充注成藏过程:第Ⅰ期发生于中中新世,以垂向运移为主,主要充注聚集于生烃洼陷范围的古近系储层内;第Ⅱ期发生于晚中新世—现今,油气呈纵、横向复合运移,具有层位多、范围广的成藏特点,是油气勘探的主要对象.该研究结论为该地区油气勘探评价和目标优选提供依据.In order to probe into hydrocarbon accumulation process,by applying the theory of hydrocarbon accumulation process,and using numerical simulation technique of petroleum basin,the hydrocarbon generation and expulsion history of source rocks of 4virtual wells were simulated.Also based on lots of fluorescence observation and homogenization temperature of fluid inclusions,combined with recovery results of burial history,the stage and the time of hydrocarbon charging in western Huizhou sag have been defined.The results show that the source rocks of Wenchang and Enping formation respectively entered the hydrocarbon generation threshold at the time of middle Eocene and at the end of early Miocene to early of late Mocene,and respectively came up to the highest peak of hydrocarbon generation at the time of Epoch to middle Miocene and middle Miocene to the present.There were two stages of hydrocarbon filling in western Huizhou sag.The first stage occurred at the time of middle Miocene with vertical migration features,the hydrocarbon mainly gathered in the Paleogene reservoir of the range of source sag.The second stage occurred at the time of late Miocene to the present with a characteristic of longitudinal,lateral composite migration,characteristic of multi-layer and with wide range,which are the main objects of oil and gas exploration in the region.The research provides the basis for exploration evaluation and target optimization.

关 键 词：油气成藏 充注期次 生排烃 流体包裹体 均一温度 惠西地区 惠州凹陷 文昌组 恩平组 

分 类 号：TE122.1[石油与天然气工程—油气勘探]