钻井液用梳型耐温抗盐增黏剂合成的逐级放大与性能  

Preparation of Temperature and Saline-resistant Comb-type Polymer Viscosifier for Water-based Drilling Fluids:Step-by-step Scale-up Study

作　　者：周忠亚 王小军[1] 秦文斌 卢和平 代林 李俊[1] 胡象辉 陈晋东 谢彬强[2] ZHOU Zhongya;WANG Xiaojun;QINWenbin;LU Heping;DAI Lin;LI Jun;HU Xianghui;CHEN Jindong;XIE Binqiang(Petroleum Engineering Technology Research Institute,Jianghan Oilfield Branch Company,Sinopec,Wuhan,Hubei 430030,P R of China;College of Petroleum Engineering,Yangtze University,Wuhan,Hubei 430100,P R of China)

机构地区：[1]中国石化江汉油田分公司石油工程技术研究院,湖北武汉430030 [2]长江大学石油工程学院,湖北武汉430100

出　　处：《油田化学》2023年第4期590-595,共6页Oilfield Chemistry

基　　金：中国石化江汉油田分公司石油工程技术研究院资助项目“红星-宜昌常压页岩气勘探潜力及目标优选”(项目编号P21087-2)。

摘　　要：选用丙烯酰胺(AM)、烯丙基聚氧乙烯醚(APEG)、丙烯酸二十二烷酯(DA)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)为反应单体,以偶氮二异丁腈(AIBN)为引发剂、十二烷基硫酸钠(SDS)为表面活性剂,通过自由基胶束聚合法,开展了梳型共聚物PMAS合成的逐级放大实验,研究了放大规模下PMAS的增黏性、抗温性、抗盐性和抗剪切性,评价了放大后PMAS在钻井液中的增黏性能。结果表明,采用3级不同的聚合规模放大后制得的PMAS存在一定的放大效应,但放大前后的PMAS始终具有较好的增黏、耐温抗盐和抗剪切能力;在190℃老化16 h后,加有质量分数为1%的PMAS的低盐钻井液和饱和盐水钻井液的表观黏度保留率分别为61.4%和60.0%,放大后PMAS抗温耐盐性能明显优于国内商用增黏剂80A-51,具有良好的市场推广应用前景。Step-by-step scale-up synthesis of comb-copolymer PMAS was carried out using acrylamide(AM),allyl polyoxyethylene ether(APEG),docosyl acrylate(DA)and 2-acrylamido-2-methylpropanesulfonic acid(AMPS)as reaction monomers,azodiisobutyronitrile(AIBN)as initiator and sodium dodecyl sulfate(SDS)as surfactant via a free radical micellar polymerization,and the properties of viscosity increment,temperature resistance,salt resistance and shear resistance were evaluated,the viscosity increasing of PMAS in the drilling fluid before and after hot-rolling was evaluated.The results showed that the scale-up experimentation of PMAS exhibited slightly varying properties when prepared by three different polymerization scale,however,always maintained excellent viscosity increments,temperature,salt resistance and shear-tolerance.After aging at the temperature of 190℃for 16 h,the apparent viscosity retention rates of low-salt and saturated brine drilling fluids with 1%PMAS were 61.4%and 60.0%,respectively.The temperature and salt resistance of PMAS at big polymerization scale was superior to that of the commercial viscosifier 80A-51,exhibiting a good application prospect.

关 键 词：梳型共聚物 增黏剂 耐温抗盐 自由基胶束聚合法 逐级放大 

分 类 号：TE254[石油与天然气工程—油气井工程]