渤海湾盆地歧口凹陷南部斜坡区沙河街组砂岩输导层分布特征及控藏意义  

Distribution characteristics and reservoir control significance of sandstone transporting layers in Shahejie Formation in southern slope area of Qikou Sag,Bohai Bay Basin

作　　者：于海涛[1] 孙雨[1] 刘海涛[2] 袁苗[3] 姜文亚[4] 闫百泉[1] Yu Hai-tao;Sun Yu;Liu Hai-tao;Yuan Miao;Jiang Wen-ya;Yan Bai-quan(College of Earth Sciences,Northeast Petroleum University,Daqing 163318,China;SINOPEC Exploration Company,Chengdu 610041,China;Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China;PetroChina Dagang Oilfield Company,Tianjin 300280,China)

机构地区：[1]东北石油大学地球科学学院,黑龙江大庆163318 [2]中国石化勘探分公司,四川成都610041 [3]中国石油勘探开发研究院,北京100083 [4]中国石油大港油田公司,天津300280

出　　处：《天然气地球科学》2019年第11期1560-1568,共9页Natural Gas Geoscience

基　　金：国家科技重大专项“渤海湾盆地北部油气富集规律与油气增储领域研究”(编号：2016ZX05006-005);东北石油大学校级研究生创新科研项目“砂岩输导体系流体连通性研究及量化表征”(编号：YJSCX2017-002 NEPU)联合资助

摘　　要：以渤海湾盆地歧口凹陷南部斜坡区为重点解剖区,探究沙河街组各砂岩输导层平面分布特征、垂向分布差异性、主控因素及控藏意义。基于连通概率与砂地比(砂岩厚度/地层厚度)模型,定量刻画研究区沙河街组沙一上亚段、沙一中亚段、沙一下亚段、沙二段及沙三2亚段等主要砂岩输导层的分布特征,并利用油气显示对研究结果进行验证。在此基础上,分析各砂岩输导层的优势输导通道主控因素及控藏意义。结果表明,三角洲前缘亚相控制了研究区砂岩输导层的优势输导通道,其中,水下分流河道砂体及河口坝砂体为优势输导砂体类型,砂体连续性的差异性引起不同层位连通程度的差异性,砂体分布的不均一性引起优势输导通道分布的差异性。通过砂岩输导层的刻画,可以预测平面上油气富集的可能范围,从而指导下一步的油气勘探。This paper took the southern slope area of the Qikou Sag of the Bohai Bay Basin as the key anatomical area,used the dynamic production data to determine the interwell connectivity,then determined the percolation threshold of the sand body connection,and established the connected probability and sand ratio model,quantitatively depicted the distribution characteristics of the main sandstone transport layers in the Shahejie Formation of the study area and verified the results of the study,and analyzed the main controlling factors and reservoir-controlling meaning of dominant transporting passage in sandstone transport layers. The results show that the delta front subfacies control the dominant transporting passage of the sandstone transport layers in the study area. The underwater distributary channel sand body and debouch bar sand body are the dominant type of transporting sand body. The difference in the continuity of the sand body causes the difference in the transport capacity of different layers and the heterogeneity of the sand body distribution causes the difference in the distribution of the dominant transporting passage. Through the characterization of sandstone transport layers,the possible range of oil and gas enrichment in the plane can be predicted,thus guiding the exploration of oil and gas.

关 键 词：歧口凹陷 斜坡区 砂岩输导层 优势输导通道 量化表征 沙河街组 

分 类 号：TE122.1[石油与天然气工程—油气勘探]