时移地震技术在油藏监测中的应用 ——以西非深水扇A油田为例  

Application of time-lapse seismic technology in deepwater turbidite reservoir monitoring:A case study of the Deepwater Fan A oilfield in West Africa

作　　者：陈筱 杨希濮 肖鹏 吕文睿 张昕 段瑞凯 CHEN Xiao;YANG Xipu;XIAO Peng;LV Wenrui;ZHANG Xin;DUAN Ruikai(CNOOC International Ltd.,Beijing 100028,China;CNOOC Research Institute Co.,Ltd.,Beijing 100028,China)

机构地区：[1]中国海洋石油国际有限公司,北京100028 [2]中海油研究总院有限责任公司,北京100028

出　　处：《石油物探》2023年第3期538-547,共10页Geophysical Prospecting For Petroleum

基　　金：中国海洋石油有限公司科研项目(YXKY-2019-ZY-07)资助。

摘　　要：A油田海上深水浊积砂岩油藏开发中井数少且井距大,井控程度较低,存在连通性难判断、水淹范围及程度难刻画、剩余油难预测等问题。时移地震技术基于分析不同时间点三维地震数据的波阻抗差异,可有效弥补井资料不足的问题,成为油田生产优化及调整挖潜的重要手段。以西非某典型深水扇油田为例,采用动静结合的思路,将时移地震与构造断裂、储层预测、井网分布、生产动态研究相结合,探讨时移地震在深水浊积挥发性油藏中的有效应用,为该类油田的时移地震应用提供借鉴与参考。研究表明,时移地震与断距结合,在判断断层封堵性方面具有较高的可靠性,可有效厘清开发矛盾,指导调整井的部署;时移地震与沉积相及储层预测相结合,可有效刻画出水驱前缘、表征水淹程度,明确生产优化方向;时移地震与井点泥岩隔夹层结合,可准确判断层间连通性,指导措施优化;综合构造断裂、沉积相分布、储层结构和井网等信息,可以实现对剩余油的有效预测并指导油田调整挖潜。Deepwater turbidite sandstone reservoirs have been developed with few wells,large well spacing,and a low degree of well control.Therefore,it is difficult to judge connectivity and describe the extent and degree of flooding.In addition,it is difficult to predict the amount of residual oil.By analyzing the differences in the wave impedance of 3D seismic data at different time points,time-lapse seismic technology can effectively overcome the limitation of insufficient well data and optimize oil field production.Taking a typical deepwater fan oilfield in West Africa as an example,the effective application of time-lapse seismic data in deepwater turbidite volatile oil reservoirs was discussed by combining time-lapse seismic data with structures,fractures,reservoirs,well patterns,and production.By combining dynamic and static data,it was possible to provide a reference for the application of time-lapse seismic data in this type of oilfield.The results show that the combination of time-lapse seismic data and fault distance has high reliability in judging sealing faults,clarifying developmental contradictions,and guiding the adjustment well.By combining time-lapse seismic data with sedimentary facies and reservoir distribution,we can effectively depict the flooding edge,characterize the degree of flooding,and clarify the measure of production optimization.The interlayer connectivity can be accurately determined by combining time-lapse seismic analysis with mudstone interlayer analysis.The remaining oil can be effectively predicted by integrating the information on the structure,fracture,sedimentary face,reservoir structure,and well pattern.

关 键 词：深水浊积 挥发性油藏 时移地震 水驱开发 应用实践 

分 类 号：P631[天文地球—地质矿产勘探]