基于储层质量综合指数的砂砾岩储层差异分布评价——以渤海M油田东三段为例  

Evaluation of differential distribution of sandy conglomerate reservoirs based on comprehensive index of reservoir quality:A case study of E3d3of M Oilfield in Bohai Sea

作　　者：别旭伟 孙藏军 石飞 刘百川 卢美月 BIE Xuwei;SUN Cangjun;SHI Fei;LIU Baichuan;LU Meiyue(Hubei Key Laboratory of Petroleum Geochemistry and Environment,College of Resources and Environment,Yangtze University,Wuhan,Hubei 430100,China;CNOOC China Limited,Tianjin Branch,Tianjin 300459,China)

机构地区：[1]油气地球化学与环境湖北省重点实验室长江大学资源与环境学院,湖北武汉430100 [2]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《中国海上油气》2024年第5期102-109,共8页China Offshore Oil and Gas

基　　金：中海石油(中国)有限公司重大项目“渤海中深层复杂油气藏高效开发技术(编号:CNOOC-KJ135 ZDXM36 TJ03TJ)”部分研究成果。

摘　　要：渤海M油田东三段砂砾岩储集体埋藏深度大、地震资料品质差,难以满足直接刻画储层的精度需求。利用钻井资料,通过主成分分析优选表征储层质量的参数,结合熵权法构建储层质量综合指数,开展了研究区东三段砂砾岩体内幕储层质量的差异分布评价,并通过动态监测资料进行了验证。结果表明:①依据储层质量综合指数累计概率分布斜率差异将研究区东三段划分为Ⅰ、Ⅱ、Ⅲ三类储层,储层质量依次为优质、中等和差等;②纵向上,片状洪流作用下(8~5小层)的储层质量品质整体差于牵引流作用下(4~1小层)的砂体沉积,其中3小层储层质量相对最好;③平面上,砂体几何展布形态经历了条带状(8~5小层)→朵叶状(4~2小层)→指状(1小层)演化。研究成果可为相似地质条件下的砂砾岩储层质量分布评价提供一定方法借鉴。In view of the large burial depth and poor seismic data quality of sandy conglomerate reservoirs in the E3d3of M Oilfield in the Bohai Sea,it is difficult to meet the accuracy requirements of direct reservoir characterization.By using drilling data,the parameters characterizing reservoir quality were optimized through principal component analysis,and the comprehensive index of reservoir quality was constructed by employing the entropy weight method.In addition,the difference distribution evaluation of the inside reservoir quality of the sandy conglomerate in the E3d3of the study area was carried out.The results were verified by dynamic monitoring data.The results show that:①According to the slope difference of the cumulative probability distribution of the comprehensive index of reservoir quality,the E3d3of the study area can be divided into three types of reservoirs:Class I,Class II,and Class III with high quality,medium quality,and poor quality,successively.②Vertically,the reservoir quality under the action of sheet torrent(8-5sub-layers)is worse than sand body deposits under the action of traction flow(4-1 sub-layers),and the quality of the third sub-layer is relatively best.③Horizontally,the geometric distribution of the sand body has undergone the evolution from ribbon(8-5sub-layers)and leaf-like(4-2sub-layers)to finger-like(the first sub-layer).The research results can provide a method reference for evaluating the quality distribution of sandy conglomerate reservoirs under similar geological conditions.

关 键 词：砂砾岩储层 东三段 储层质量 差异分布 

分 类 号：TE321[石油与天然气工程—油气田开发工程]