页岩气压裂用环保型降阻剂的制备  

Synthesis of environmental benign drag reducer for shale gas fracturing

作　　者：祝纶宇[1] 伊卓[1] 方昭[1] ZHU Lunyu;YI Zhuo;FANG Zhao(Sinopec Beijing Research Institute of Chemical Industry,Beijing 100013,China)

机构地区：[1]中国石油化工股份有限公司北京化工研究院,北京100013

出　　处：《南京工业大学学报（自然科学版）》2018年第6期13-19,共7页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：中国石化重点科技开发攻关项目(217007)

摘　　要：采用双水相分散聚合制备水包水(W/W)型聚丙烯酰胺乳液,得到应用于页岩气滑溜水压裂液的环保型水包水降阻剂。考察相分离剂、分散稳定剂、引发体系、单体含量和温度对水包水系统聚合稳定性的影响。结果表明:采用(NH_4)_2SO_4和Na_2SO_4混合物为相分离剂、水解聚丙烯酰胺为分散稳定剂、K2S2O8-Na HSO_3为引发剂、单体丙烯酰胺质量分数为18%,在30℃下聚合,聚合过程平稳可控,聚合产物析出分散稳定,所得产物配制降阻剂同常规压裂助剂配伍,在30 L/min排量下,降阻率达到67%,可作为常规油包水降阻剂的环保型替代品。Water-in-water(W/W)polyacrylamide emulsion,as an environmental benign drag reducer for slick water fracturing fluid used in shale gas stimulation operation,was prepared by aqueous two-phase dispersion polymerization.The effects of phase separation agent,dispersion stabilizer,initiator system,monomer content,and reaction temperature on the polymerization stability of water-in-water system were investigated.Results showed that with the reaction parameter of the mixture of sodium and potassium sulfate as phase separation agent,the hydrolyzed polyacrylamide as dispersion stabilizer,potassium persulfate-sodium bisulfite as polymerization initiator,the monomer acrylamide concentration of 18%,and polymerization temperature of 30℃,the polymerization process was stable and controllable.The precipitation and dispersion of the polymerization product were stable,and the obtained product was compatible with conventional fracturing fluid aid.The drag reduction rate of obtained product was 67%at pump rate of 30 L/min,which could be used as environmental benign alternatives of conventional water-in-oil(W/O)drag reducer.

关 键 词：环保型降阻剂 水包水型聚丙烯酰胺乳液 分散稳定剂 滑溜水 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]