JYC-1聚合物微球乳液膨胀性能及调驱适应性研究  

The Study of Expansion Performance and Flooding Adaptability of JYC-1 Polymer Microsphere Emulsion

作　　者：曹毅[1,2] 邹希光[3] 杨舒然[4] 王小培[5] 岳湘安[1,2] 

机构地区：[1]中国石油大学石油工程教育部重点实验室,北京102249 [2]中国石油大学(北京)石油工程学院,北京102249 [3]中国石油大庆油田海拉尔石油勘探开发指挥部,内蒙古海拉尔021008 [4]中国石油西南油气田分公司川西北气矿,四川江油621709 [5]中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000

出　　处：《油田化学》2011年第4期385-389,共5页Oilfield Chemistry

基　　金：国家自然科学基金青年基金项目"油水在油藏孔喉中的流动和乳化机理研究"(项目编号50804051);国家科技重大专项课题"油田开采后期提高采收率新技术"(项目编号2009ZX05009-004)

摘　　要：采用反相乳液聚合法制备了JYC-1聚合物微球乳液,筛分为毫米级、微米级和纳米级,测定了纳米级微球乳液的粒径和表观黏度随养护时间变化规律,通过室内物理模拟实验评价了其在高含水非均质油藏模型中的调驱效果。实验结果表明:在模拟油藏温度(70℃)下JYC-1聚合物微球水化膨胀粒径逐渐增大,70℃恒温养护60 d后,JYC-1聚合物微球的PDI值为0.274,平均粒径超过了410.8 nm,此时微球乳液体系的分散性最好,膨胀作用趋于稳定;JYC-1微球乳液体系的表观黏度变化不大,养护60 d后最大表观黏度为2.4 mPa.s;JYC-1聚合物微球乳液的适宜注入浓度为2000 mg/L,适宜注入段塞为0.2 PV毫米级+0.2 PV纳米级,在渗透率级差大于3的非均质油藏模型中调驱后,可有效扩大低渗透率岩心的波及体积,明显提高低渗透率岩心的采收率。The polymer microsphere emulsion JYC-1 was synthesized by inversed emulsion polymerization,and the microspheres with different particle size of millimeter,micrometer and nanometer was obtained by screening,the variation of the particle size and the apparent viscosity of JYC-1 with maintenance time was studied and the physical simulation experiments of JYC-1 emulsion was conducted.The experiments results showed that,at the simulated reservoir temperature of 75 ℃,the size of JYC-1 microspheres in the water increased gradually,when keeping to be heated by water at 70℃ for 60 days,the PDI of the microsphere emulsion was 0.274,and the average particle size of the JYC-1 microspheres was higher than 410.8 nm,meanwhile,the dispersivity of the microsphere system was good and the expansion tended to remain stable.In addition,the apparent viscosity of the microsphere emulsions did not change significantly,the maximum apparent viscosity was 2.4 mPa·s after maintained at 70℃ for 60 days.The physical simulation experiments showed that the appropriate injection concentration of JYC-1 microsphere was 2000 mg/L,the suitable slugging was 0.2 PV ×2000 mg/L ＂millimeters grade＂ ＋ 0.2 PV×2000 mg/L ＂nanometer grade＂.After the system was injected into the two groups of parallel core with the permeability level difference≥3,the swept volume of the low permeability core was expanded and the oil recovery of the low permeability core was enhanced obviously.

关 键 词：聚合物微球 粒径 表观黏度 波及体积 提高采收率 深部调剖 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程] TE39