三角洲前缘河口坝单砂体划分及剩余油分布  

Division of Single Sand Body in Mouth Bar of Delta Front and Remaining Oil Distribution

作　　者：李俊飞 叶小明 尚宝兵 党胜国 于斌 Li Junfei;Ye Xiaoming;Shang Baobing;Dang Shengguo;Yu Bin(CNOOC Tianjin Company, Tianjin 300459, China;CNOOC Research Center, Beijing 102200, China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459 [2]中海油研究总院,北京102200

出　　处：《特种油气藏》2019年第2期59-64,共6页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项"渤海油田加密调整及提高采收率油藏工程技术示范"(2016ZX05058-001)

摘　　要：针对油田开发中后期剩余油分布复杂、挖潜难度增大的问题,以渤海湾盆地S油田东营组二段下亚段为例,综合应用岩心、测井、水淹解释和生产动态等资料,对三角洲河口坝复合体内部单砂体进行定量表征,并分析其对剩余油分布的控制作用。研究结果表明:研究区河口坝单砂体平面接触样式分别为河坝接触、坝主体接触、坝缘接触和坝间泥接触。河坝接触和坝主体接触的砂体连通性较好,剩余油不富集;坝缘接触和坝间泥接触的砂体连通性差或不连通,在其侧翼易形成剩余油。该研究可有效地指导油田后期综合调整工作。Aiming at the complex remaining oil distribution and increasing difficulty in potential tapping at middle-late stage of oilfield development, taking the lower sub-member of second member in Dongying Formation of S oilfield in the Bohai Bay Basin for example, the data of core, well logging, water out interpretation and production performance were used to carry out quantitative characterization on the single sand body within the deltaic mouth bar complex, and analyze its control effect on remaining oil distribution. The study results show that the planar contact patterns of single sand body in mouth bar of the study area are river dam contact, dam body contact, dam margin contact and interdam mud contact respectively. The sand bodies in river dam contact and dam body contact have good connectivity, and remaining oil is not enriched;while the sand bodies in dam margin contact and interdam mud contact have poor connectivity or are disconnected, and remaining oil is easy to form on their flanks. This study can effectively guide the overall system adjustment of oil field at late stage.

关 键 词：河口坝 三角洲前缘 单砂体 剩余油 东营组 渤海湾盆地 

分 类 号：TE122[石油与天然气工程—油气勘探]