摘要
河流相砂体是埕岛地区中浅层主要的油气输导层和储集层,研究其输导性对油气勘探具有重要意义。研究认为,断层相连是中浅层河流相砂体输导油气的前提,构造背景影响着油气输导方向;河道沉积砂体输导性最好,堤岸沉积砂体次之,泛滥平原沉积的砂体最差。不同岩性中细砂岩输导性最好,中砂岩次之,粉砂岩第三;输导砂体物性下限随着埋深增加而减少;砂体连通性越好,输导性越好。根据砂体宏观连通基本类型,建立了厚砂体直接连通型、微断层连通型和薄砂体或物性较差砂体连通型三种输导模式,并提出中浅层河流相砂体输导性的评价思路。
Fluvial sand body is the main carrier bed and reservoir in middle-shallow layers of Chengdao district. The results indicate whether the channel and source fault are connected is the premise of hydrocarbon migration in Fluvial sand body and the structural background influences the direction of hydrocarbon migration. The transporting capacity of sand body in river channel is the best, embankment is the secondary, floodplain sediment is the worst, the transporting capacity of fine-grained sandstone is the best, sandstone is the secondary and the siltstone was the third. The physical properties of the lower limit of migration sand decreases with the increase of depth, the better connectivity of sand body, the better migration performance of sand body. According to the basic types of sand body macro-connection, three types of sand connection patterns are established, i.e. thick sand body direct connection, micro fault connection, and thin or poor physical property sand body connection, and the migration performance evaluation plan of sand bodies in middle-shallow layers was provided.
出处
《石油地质与工程》
CAS
2018年第1期41-45,共5页
Petroleum Geology and Engineering
基金
中国地质调查局中国矿产地质与成矿规律综合集成和服务(矿产地质志)项目(编号:DD20160346)
国家科技重大专项课题"中国近海富烃凹陷优选与有利勘探方向预测"(项目编号:2016ZX05024-002)联合资助
关键词
埕岛地区
新近系
河流相砂体
油气输导
Chengdao district
Neogene
fluvial sand body
hydrocarbon migration