聚合物驱前区块整体调剖在普通稠油油藏的应用  

Application of All-Area Integrated Indepth Profile Modification in Bi-123 Block of Gucheng Oilfield

作　　者：刘文华[1] 孔柏岭[1] 丁诚开[1] 李芳[2] 魏建中[2] 贾环朝[2] 

机构地区：[1]中国石化河南油田分公司石油勘探开发研究院,河南南阳473132 [2]中国石化河南油田分公司采油二厂,河南南阳473400

出　　处：《油田化学》2010年第1期59-61,65,共4页Oilfield Chemistry

基　　金：中国石油化工股份有限公司科技攻关项目"改善聚合物驱开发效果技术"(项目编号P01045)

摘　　要：为了控制聚驱过程中聚合物窜流,河南古城油田泌123区块实施了聚驱前整体深部调剖。选择聚合物铬凝胶为调剖剂,分较低、较高浓度的两个段塞注入,两段塞体积比为0.75∶0.25,成胶时间分别为24、10小时。该区块14口注聚井中,4口油井转注聚井除外,其余10口井同时进行聚驱前调剖,调剖厚度2.0～6.5m,调剖半径35～50m,调剖剂单井注入量1718～6943m3,总注入量35526m3。调剖后10口井注入压力、启动压力上升,视吸水指数下降,平均改变量分别为+5.1MPa、+5.18MPa、-5.1m3/d.MPa;两口井同位素测试数据表明调剖后吸水剖面大幅改善。古泌123区块注聚1、2、3年时产出液中聚合物浓度分别为63、128、157mg/L,与其他6个注聚区块相比,均大幅减少。For the purpose of controlling polymer channellings in the course of polymer flooding,a program of all-area integrated indepth profile modification before polymer flood was conducted in Bi-123 block of Gucheng,Henan. The profile modificator chosen was Cr3＋/polymer gelling fluids of lower and higher concentration,which became gels in 24 and 10 hrs,respectively,and injected as successive slugs in volume ratio 0.75：0.25. Of 14 polymer injecting wells in Bi-123 block 4 were converted from production wells and profile modification jobs were performed in other 10 wells with treating thickness 2.0—6.5 m,treating radium 35—50 m,average volume of gelling fluids injected per well 1718—6943 m^3 and totally 35526 m^3. For the 10 injecting wells after the profile modification program finished,the initial and the normal injection pressure increased by 5.18 and 5.1 MPa,respectively,in average and the apparent water injectivity index was decreased by 5.1 m^3/d·MPa in average; the data of isotope determinations for 2 of the 10 wells showed notable improvements in water injectivity profile in these wells. The polymer concentration in the produced water in Bi-123 block was of 63,128,and 157 mg/L in 1,2,and 3 years of polymer flooding and these values of produced polymer concentration were much lower than that in other 6 polymer flooding blocks of Gucheng.

关 键 词：区块整体调剖 深部调剖 聚合物驱前 聚合物凝胶 注入工艺 工艺设计 聚合物窜流 聚合物产出 河南古城油田 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程] TE39