低渗透夹层分布对正韵律非均质储层渗流规律的影响  

The Influence of Low Permeability Interlayers Distribution on the Seepage Law of Positive Rhythm Heterogeneous Reservoir

作　　者：张翔宇 于田田 李爱芬[4] 张仲平 郑万刚 初伟 马爱青 冯海顺 Zhang Xiangyu;Yu Tiantian;Li Aifen;Zhang Zhongping;Zheng Wangang;Chu Wei;Ma Aiqing;Feng Haishun(Sinopec Shengli Oilfield Company,Chunliang Oil Production Plant,Binzhou,Shandong 256600,China;Sinopec Shengli Oilfield Company,Petroleum Engineering Technology Research Institute,Dongying,Shandong 257000,China;Shandong Key Laboratory of Heavy Oil Exploitation Technology,Dongying,Shandong 257000,China;China University of Petroleum(East China),Qingdao,Shandong 266000,China)

机构地区：[1]中国石化胜利油田分公司纯梁采油厂,山东滨州256600 [2]中国石化胜利油田分公司石油工程技术研究院,山东东营257000 [3]山东省稠油开采技术重点实验室,山东东营257000 [4]中国石油大学(华东),山东青岛266000

出　　处：《特种油气藏》2024年第5期102-109,共8页Special Oil & Gas Reservoirs

基　　金：国家重点研发计划项目“稠油化学复合冷采基础研究与工业示范”(2018YFA0702400);中国石化前瞻顶目“低渗水驱油藏改善渗流功能性减阻剂研究”(P22182);山东省泰山产业创新项目“生物化学复合提高难采稠油采收率技术创新及产业化”(tscx202312058)。

摘　　要：针对水驱后储层非均质性加剧、含水上升快、剩余油分布规律复杂、提高采收率难的问题,开展了低渗透夹层分布对正韵律非均质储层渗流规律的影响研究。利用油藏数值模拟软件CMG模拟了存在夹层条件下的正韵律油藏水驱油过程,同时基于相似准则建立了正韵律非均质储层的填砂物理模型,开展了水驱油实验研究。利用物理模拟实验结果验证了数值模型的准确性,在此基础上分析了夹层位置对正韵律油层渗流规律的影响。研究表明:夹层的存在增加了层间非均质性,能够分割油层,起到渗流屏障和扩大波及体积的作用;驱替结束后,正韵律油层的剩余油在重力作用下会呈现“顶多底少”的分布形态;夹层附近是剩余油富集的主要区域。该研究对剩余油的进一步挖潜和油田持续开发具有重要意义。Aiming at the problems occuring after water flooding,such as intensified reservoir heterogeneity,rapid increase of water content,complex distribution of remaining oil,and difficult to improve oil recovery,the study on the influence of low permeability interlayers distribution on the seepage law of positive rhythm heterogeneous reservoirs was conducted.The reservoir numerical simulation software CMG was adopted to simulate the water flooding process of the positive rhythm reservoir with interlayer.At the same time,the sand filling physical model of the positive rhythm heterogeneous reservoir was established based on the similarity criterion,and the water flooding experiment was carried out.Also,the accuracy of the numerical model is verified by the results of physical simulation experiments.On this basis,the influence of interlayer position on the seepage law of positive rhythm reservoir is analyzed.The research shows that the existence of interlayer increases the interlayer heterogeneity,plays the role of seepage barrier,and expands the swept volume.After water flooding,the remaining oil in the positive rhythm reservoir would display a distribution pattern featuring"more top and less bottom"under gravitation,which indicates that the area near the interlayer is the main region of remaining oil enrichment.This study is of great significance for further tapping the potential of remaining oil and sustainable development of oilfield.

关 键 词：低渗透夹层 非均质 正韵律油藏 渗流规律 剩余油 

分 类 号：TE348[石油与天然气工程—油气田开发工程]