新型耐温抗盐疏水缔合聚合物的制备及性能  

Preparation and performance of a novel hydrophobic associating polymer with excellent temperature-resistance and salt-tolerance

作　　者：王桂芹[1] 陈涛 张蕊[1] 宋宪实 Wang Guiqin;Chen Tao;Zhang Rui;Song Xianshi(School of Petroleum Engineering and Environmental Engineering,Yan’an University,Yan’an Shaanxi 716000,China;Ansai Yanhewan Purification Plant,Yanchang Gas Field No.3 Gas Production Plant,Yan’an Shaanxi 716000,China;Northeast Oil&Gas Branch of Sinopec,Changchun Jilin 130062,China)

机构地区：[1]延安大学石油工程与环境工程学院,陕西延安716000 [2]延长气田采气三厂安塞沿河湾净化厂,陕西延安716000 [3]中国石化东北油气分公司,吉林长春130062

出　　处：《石油化工》2020年第7期657-663,共7页Petrochemical Technology

基　　金：陕西省教育厅专项科研计划项目(18JK0839,20JK0992)。

摘　　要：以丙烯酰胺(AM)、丙烯酸(AA)、两性甜菜碱单体(MADPS)和油溶性双尾疏水单体(DiC12AM)为原料通过自由基聚合制备了一种疏水缔合聚合物HASPAM,通过单因素方法优化了制备条件,采用1H NMR和黏弹性测试等方法考察了HASPAM的性能。实验结果表明,HASPAM的最佳制备条件为:n(AM)∶n(AA)=4∶1,MADPS用量0.6%(x),DiC12AM用量0.2%(x),单体总用量30%(w),引发剂加量为单体总质量的0.15%,pH=7,25℃,4.0 h。在该条件下制备的0.4%(w)HASPAM溶液黏度为148.5 mPa·s,临界缔合浓度约为400 mg/L,在140℃、170 s^-1下剪切120 min后黏度保持在63 mPa·s。HASPAM的抗盐性能较好,当过硫酸铵加量为0.08%(w)时HASPAM溶液可完全破胶,且对岩心伤害最低为14.56%,可作为压裂液对储层进行压裂改造。With acrylamide(AM),acrylic acid(AA),3-((3-methacrylamidopropyl)dimethylammonio propane-1-sulfonate(MADPS)and N,N-didodecylmethacrylamide(DiC12AM)as raw materials,a novel hydrophobic associating polymer HASPAM was prepared by radical polymerization.The preparation conditions were optimized by mono-factor analysis.The properties of HASPAM were analyzed by 1 H NMR and viscoelasticity test.The result shows that the optimal conditions for preparation are n(AM)∶n(AA)4∶1,MADPS amount 0.6%(x),DiC12AM amounts 0.2%(x),total monomer amount 30%(w),initiator amount 0.15%(w),pH 7,25℃,4.0 h.The viscosity of 0.4%(w)HASPAM solution is 148.5 mPa·s and the critical associating concentration of HASPAM is 400 mg/L.The viscosity of HASPAM is about 63 mPa·s after shearing 120 min at 140℃and 170 s^-1.The HASPAM solution has the excellent salt resistance,and it is broken completely using the 0.08%(w)ammonium persulfate and the core damage rate is as low as 14.56%.Therefore,the HASPAM solution could be used as the fracturing fluid to stimulate the reservoirs.

关 键 词：疏水缔合聚合物 耐温抗盐 低伤害 压裂液 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]