高含水期剩余油控制因素及调整挖潜研究--以辽东湾J油田东营组东二下亚段为例  

Study on control factors and adjustment and potential exploitation of remaining oil in high water cut stage:A case from the lower sub⁃member of the 2nd Member of Dongying Formation in J oilfield of Liaodong Bay

作　　者：张振杰 张国浩 瞿朝朝 李展峰 王永平 ZHANG Zhenjie;ZHANG Guohao;QU Zhaozhao;LI Zhanfeng;WANG Yongping(Tianjin Branch of CNOOC(China)Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]中海石油(中国)有限公司天津分公司

出　　处：《录井工程》2023年第3期132-138,共7页Mud Logging Engineering

基　　金：“十三五”国家科技重大专项课题“渤海油田加密调整及提高采收率油藏工程技术示范”(编号:2016ZX05058001)。

摘　　要：随着渤海辽东湾海域J油田逐步进入高-特高含水阶段,剩余油分布日趋复杂,调整挖潜的难度也越来越大,为进一步厘清剩余油的控制因素及分布特征,以J油田主体区东侧东营组东二下亚段为例,在小层划分与对比的基础上,依据三角洲相储层构型理论对单成因砂体垂向及平面的接触关系进行了详细解剖,并分析了构型单元对油水运动的控制作用。结果表明,层间不同单砂体相带干扰、层内单砂体隔夹层和韵律性以及平面单砂体接触关系是控制剩余油分布的主要因素,各小层内部及单砂体间由于存在渗流屏障导致在砂体边部易形成剩余油富集。据此结合生产动态分析及数模剩余油分布研究结果,设计两口调整井方案,钻后初期合计日产油140 t,截至目前累产油超5.0×10^(4) t,取得了较好的开发效果,为高含水开发后期老油田剩余油挖潜提供了有益参考。With J oilfield in Liaodong Bay of Bohai Sea gradually entering the high⁃extra high water cut stage,the distribution of remaining oil becomes increasingly complex,and it is increasingly difficult to adjust and exploit potential.In order to further clarify the control factors and distribution characteristics of remaining oil,taking the lower sub⁃member of the 2nd Member of Dongying Formation on the east side of the main area of J oilfield as an example,based on the division and correlation of micro⁃layers,the vertical and plane contacts relationships of the monogenetic sand body were dissected in detail according to the configuration theory of delta facies reservoir,and the control effect of configuration units on oil/water movement was analyzed.The results show that the main factors controlling the distribution of remaining oil are the interference of single sand body facies belts between the layers,the barrier/interbed and rhythm of single sand bodies within the layers and planar single sand body contact relationship.Due to the existence of seepage barrier inside each micro⁃layer and between single sand bodies,it is easy to form remaining oil enrichment at the edges of sand bodies.Based on this,combined with production performance analysis and numerical simulation of remaining oil distribution research results,the schemes for two adjustment wells were designed.The total daily oil production is 140 tons in the initial stage after drilling,and the cumulative oil production has exceeded 5.0×104 t up to now,achieving good development results,and providing a useful reference for exploiting the potential of remaining oil in old oil fields in the later stage of high water cut development.

关 键 词：高含水期 单成因砂体 剩余油 控制因素 调整挖潜 

分 类 号：TE132.1[石油与天然气工程—油气勘探]