相渗改善特性减阻剂乳液制备及现场应用  

Preparation of friction reducing emulsion with relative permeability modification and its field application

作　　者：龚俊[1] 叶俊红[1] 陈亮[1] 罗帅 罗明良[2] GONG Jun;YE Junhong;CHEN Liang;LUO Shuai;LUO Mingliang(Offshore Oil Production Plant,Shengli Oilfield Company Ltd.,SINOPEC,Dongying 257237,China;MOE Key Laboratory of Unconventional Oil&Gas Development,China University of Petroleum,Qingdao 266580,China)

机构地区：[1]中国石化胜利油田分公司海洋采油厂,山东东营257237 [2]中国石油大学(华东)非常规油气开发教育部重点实验室,山东青岛266580

出　　处：《断块油气田》2020年第4期528-532,共5页Fault-Block Oil & Gas Field

基　　金：国家自然科学基金项目“致密油储层低摩阻纳米磁流体压裂液构筑及渗吸驱油机制”(51874334);山东省自然科学基金项目“致密油储层纳米磁流体压裂渗吸增油控水机理研究”(ZR2018MEE010);国家科技重大专项课题“中亚和中东地区复杂碳酸盐岩油气藏采油采气关键技术研究与应用”(2017ZX005030-005)。

摘　　要：高含水低渗透油藏压裂裂缝效应易导致油井含水率快速上升,常规低摩阻压裂液难以满足控水压裂要求,因此,以丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)和N,N-二甲基丙烯酰胺(DMAA)为主要材料,制备了一种具有相渗改善特性的减阻剂乳液(FRA-1),同时表征了合成产物主要基团及乳液粒径分布,考察了FRA-1的减阻性与相渗改善性能,并在胜利油田进行了现场应用。实验结果表明:合成产物在红外谱图中呈现出3种聚合物单体主要官能团的特征峰;乳液粒径约80 nm,随静置时间增加而增大;质量浓度为10 mg/L的FRA-1溶液减阻率可达72.5%,进入储层可降低水相渗透率80%以上,对油相渗透率影响较小。现场应用显示,FRA-1具有良好的减阻效果,压裂后油井含水率降低幅度达50%以上,具有良好的应用前景。Water-cut of oil wells rises rapidly due to the fracture effect in low permeability reservoirs with high water saturation,and conventional low friction fracturing fluids are difficult to meet the requirements of water control fracturing.With acrylamide(AM),2-acrylamide-2-methyl propane sulfonic acid(AMPS)and N,N-2-methacrylamide(DMAA)as main materials,the friction reducing emulsion(FRA-1)with relative permeability modification was prepared.The main groups and particle size distribution of synthetic product were characterized.The performance of FRA-1 friction reduction and relative permeability modification were investigated,and FRA-1 was also used in Shengli Oilfield.The results show that the characteristic absorption peaks of three polymer monomers in the infrared spectrum confirm the product formation,and the particle size of FRA-1 emulsion is about 80 nm and increases with the standing time.The friction reduction rate of FRA-1 solution by mass concentration of 10 mg/L can reach 72.5%;water phase permeability can be reduced by more than 80%,but oil phase permeability is littlely affected when FRA-1 solution invades the reservoir.In piolt test,FRA-1 possessed good friction reduction effect,and water-cut of oil well decreased by more than 50%,showing good prospect for water control of fractured oil wells.

关 键 词：低渗透油藏 减阻剂 反相乳液聚合 相渗改善 现场应用 

分 类 号：TE358.1[石油与天然气工程—油气田开发工程]