耐高温酸液胶凝剂的制备及性能评价  

Preparation and Performance Evaluation of Acid Gelling Agent with High Temperature Resistance

作　　者：李晖[1] 罗斌[1] 李钦[1] 郭淑芬[1] 鲁红升[2,3] 兰健 LI Hui;LUO Bin;LI Qin;GUO Shufen;LU Hongsheng;LAN Jian(Borehole Operation Branch Office of Southwest Petroleum Engineering,Sinopec,Deyang,Sichuan 618000,P R of China;College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,P R of China;Engineering Research Center of Oilfield Chemistry(Ministry of Education),Chengdu,Sichuan 610500,P R of China)

机构地区：[1]中国石化西南石油工程有限公司井下作业分公司,四川德阳618000 [2]西南石油大学化学化工学院,四川成都610500 [3]油田化学教育部工程研究中心(西南石油大学),四川成都610500

出　　处：《油田化学》2022年第4期589-594,共6页Oilfield Chemistry

基　　金：中国石化西南石油工程重点项目“耐高温酸液胶凝剂研制及应用”(项目编号XN-2021-009)。

摘　　要：两性离子胶凝剂具有价格低和合成方便的优点,并能基于胶凝剂之间的超分子作用提升酸液的黏度。为了构造可长期应用于深度酸化压裂的胶凝酸体系,以丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、二甲基二烯丙基氯化铵(DMDAAC)或甲基丙烯酰氧乙基三甲基氯化铵(DMC)等为原料,以自由基水溶液聚合法合成了2种两性离子胶凝剂PAAD1(AM-AMPS-DMDAAC)和PAAD2(AM-AMPS-DMC)。对胶凝剂的制备条件进行了优选,考察了其在酸液中的酸溶时间、增黏性能和耐温耐剪切性。结果表明,2种胶凝剂的酸溶时间低于40 min,增黏性能较好。将PAAD1和PAAD2按质量比7∶3复配后,酸液黏度(25℃、170 s^(-1))可达39 mPa·s;在160℃、s^(-1)下剪切90 min后的黏度为15 m Pa·s。相较于单一的胶凝剂,复配胶凝剂的增黏、耐温和耐剪切性能更佳。Amphoteric gelling agent has the advantages of low price and convenient synthesis. It can improve the viscosity of acid based on the supramolecular effect of gelling agents. In order to construct the gelling acid system which can be applied in deep acidification fracturing well for a long time, two amphoteric gelling agents were synthesized from acrylamide(AM),2-acrylamide-2-methylpropanesulfonic acid(AMPS),dimethyl diallyl ammonium chloride(DMDAAC)or methacryloyloxyethyl trimethyl ammonium chloride(DMC)by free radical aqueous solution polymerization. The preparation conditions of gelling agents were optimized,and then the acid dissolving time,viscosity and temperature and shear resistance of gelling agents in acid solution were investigated. The results showed that the acid dissolving time of two amphoteric gelling agents were less than 40 min.Meanwhile,the viscosity increasing performance was good. The viscosity of acid containing the compound of two amphoteric gelling agents mixed in mass ratio 7∶3 was 39 m Pa·s at 25 ℃ and 170 s^(-1)),while that was 15 mPa·s at 160 ℃ and 170 s^(-1) after continuous shearing for 90 min. Compared with a single gelling agent,the compound gelling agent had better viscosity increasing property,temperature resistance and shear resistance performance.

关 键 词：两性离子 胶凝剂 胶凝酸 增黏 耐温 

分 类 号：TE357[石油与天然气工程—油气田开发工程]