基于势函数的井网流线演变特征  

Streamline evolution characteristics of well patterns based on potential function

作　　者：何海峰[1] 徐宏光 曹嫣镔[2,5] 李健康 郭省学[2,5] 唐洪涛[6] HE Haifeng;XU Hongguang;CAO Yanbin;LI Jiankang;GUO Shengxue;TANG Hongtao(Gudong Oil Production Plant,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257237,China;Research Institute of Petroleum Engineering and Technology,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257000,China;Postdoctoral Work Station of Shengli Oilfield,SINOPEC,Dongying City,Shandong Province,257000,China;Petroleum Engineering School,Southwest Petroleum University,Chengdu City,Sichuan Province,637000,China;Shandong Key Laboratory of Heavy Oil Production Technology,Dongying City,Shandong Province,257000,China;Shengli Oil Production Plant,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257051,China)

机构地区：[1]中国石化胜利油田分公司孤东采油厂,山东东营257237 [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]中国石化胜利石油管理局有限公司博士后科研工作站,山东东营257000 [4]西南石油大学石油与天然气工程学院,四川成都637000 [5]山东省稠油开采技术重点实验室,山东东营257000 [6]中国石化胜利油田分公司胜利采油厂,山东东营257051

出　　处：《油气地质与采收率》2022年第4期128-134,共7页Petroleum Geology and Recovery Efficiency

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)。

摘　　要：在油田开发过程中,经常遇到井网调整问题,x油藏初期采用反九点井网开发,生产过程中高含水油井转注、同时采油井排排间加密,井网变为排状注采井网。而井网调整后注采井间的流场会发生改变,流体流动规律变得更加复杂。为了研究反九点井网至排状注采井网的流线演变特征,考虑储层非均质性和压实作用对势函数方程进行求解,得到反九点井网流线;进而结合实际井网的调整模式,得到了反九点井网转排状注采井网的流线模型,获得井网调整后的流线。研究结果表明,反九点井网的流线分割区位于排状注采井网的主要流动区,加密后,注入水与加密井之间的流线穿越了该部分区域,井网水驱控制程度得到改善,原先驱替效果差的区域受到注入水的波及。排状注采井网的不可动区域位于反九点井网的主流线区域,在反九点井网的开发过程中已经受到注入水的驱替。流线分布特征显示反九点井网边角井之间的流线分割区、排状注采井网原采油井排采油井与加密井之间的流线分割区以及加密前后流线分割区的叠合区水驱效果较差。研究揭示了反九点井网至排状注采井网的流线演变特征,为井网的二次加密调整提供了理论基础。The adjustment of well patterns is often encountered during the development of oil fields.The inverted nine-spot pattern is adopted in the initial development stage of x oil reservoir.During its production,high-water-cut oil-producing wells are converted into injection wells,and production wells are infilled between rows,which means the well pattern is changed into a row injection-production well pattern.After the adjustment of well patterns,the flow field between injection and production wells will change,and the flow laws of fluid will become complicated.To study the evolution characteristics of the flow field from the inverted nine-spot pattern to the row injection-production well pattern,this paper considered the heterogeneity and compaction of reservoirs for solving the potential function equation and obtained the streamline of the inverted nine-spot pattern.On the basis of the actual adjustment mode of well patterns,the streamline model for the change from the inverted nine-spot pattern to the row injection-production well pattern was derived,and the streamline after well pattern adjustment was obtained.The results reveal that the streamline partition area of the inverted nine-spot pattern is in the main flow area of the row injection-production well pattern,and upon infilling,the streamline between injection and infill wells passes through this area.Therefore,the water flooding control degree of the pattern is improved,and the area with poor displacement effect is affected by the injected water.The immovable area of the row injection-production well pattern is in the mainstream area of the inverted nine-spot pattern,which has been displaced by injected water during the development of the inverted nine-spot pattern.The streamline distribution characteristics demonstrate that the water flooding effect is poor in the streamline partition area between edge and corner wells of the inverted nine-spot pattern,the streamline partition area between the row production wells of the original production well and the in

关 键 词：反九点井网 排状注采井网 流线 演变特征 

分 类 号：TE135[石油与天然气工程—油气勘探]