两性离子聚合物黏土水化抑制剂的合成与性能  

Synthesis and Evaluation of Zwitterionic Copolymer as Clay Stabilizer

作　　者：梁利喜[1] 刘锟[1] 刘向君[1] 苟绍华[1,2] 叶仲斌[1,2] 刘曼[3] 张丹[2] 

机构地区：[1]油气藏地质及开发工程国家重点实验室,西南石油大学,四川成都610500 [2]西南石油大学化学化工学院,四川成都610500 [3]中国石油长庆油田分公司超低渗透油藏第四项目部,甘肃庆阳745000

出　　处：《油田化学》2015年第4期475-480,共6页Oilfield Chemistry

基　　金：国家自然科学基金石化联合基金重点项目“页岩气低成本高效钻完井技术基础研究”(项目编号U1262209);油气藏地质及开发工程国家重点实验室开放基金资助项目“黏土矿物微观水化特征研究”(项目编号PLN0906)

摘　　要：以丙烯酰胺(AM),2-丙烯酰胺-2-甲基丙磺酸(AMPS)和氯化N-甲基-N-烯丙基咪唑(MAC),烯丙醇聚氧乙烯醚(APEG)制备了一种耐温耐盐四元共聚物AM/AMPS/MAC/APEG,并对该聚合物进行了红外、核磁表征,考察了聚合反应条件对聚合产物防膨率的影响,探讨了不同条件下合成聚合物溶液及其与KCl复配体系对膨润土的防膨能力以及对伊利石和泥页岩水化作用的影响。结果表明:最佳合成条件为:单体总量为20%,单体配比AM/AMPS/MAC/APEG为90∶5∶3∶2,引发剂(亚硫酸钠/过硫酸铵,摩尔比1∶1)加量0.2%,p H值4,反应温度40℃。合成聚合物具有较强的抑制能力。浓度为20 g/L合成聚合物溶液对膨润土的防膨率为79%,且能明显降低伊利石的水化膨胀应力,同时30 g/L合成聚合物与5 g/L的KCl复配后能够将泥页岩在水溶液浸泡后的压入硬度保留率由在水中的21.7%提高至69%。AM/AMPS/MAC/APEG copolymer was synthesized using acrylamide（AM）,2-acrylamido-2-methyl propane sulfuric acid（AMPS）,Chloride N-allyl-N-methyl morphine moiety（MAC）and Acrylic polyether（APEG）as raw material. The structure of the copolymer was studied by IR and1 H NMR,and the influence of reaction condition on the anti-swelling ratio of the prepared copolymer was investigated. In the end,the inhibition ability of the prepared copolymer solution and the copolymer/KCl complex system was probed under different conditions. The reaction conditions were optimized as followed：total monomers content was20%,the monomer mass ratio of AM/AMPS/MAC/APEG was of 90∶5∶3∶2,the initiator（sodium sulfite/ ammonium persulfate,molar ratio 1∶1）content was 0.2%（based on the monomer mass）,the p H value was 4,and the reaction temperature was 40℃. The synthesized polymer had good inhibiting ability. It was found that the anti-swelling ratio of the prepared copolymer solution with the concentration of 2 g/L was over 79%,and it also could inhibit the swelling stress of illite. Whats more,the complex system containing 30 g/L the prepared copolymer and 5 g/L KCl could improve the indentation hardness retention of the shale in water from21.7% to 69%.

关 键 词：两性离子聚合物 黏土稳定剂 耐温 耐盐 泥页岩水化 

分 类 号：TE254.4[石油与天然气工程—油气井工程]