一种自增稠酸化转向聚合物的研究  

Study on a self-thickening acidizing diverting polymer

作　　者：尚玲 甄学乐 全红平 田海洋[2,3] 邓顺杰 SHANG Ling;ZHEN Xue-le;QUAN Hong-ping;TIAN Hai-yang;DENG Shun-jie(Experiment and Detection Research Institute,PetroChina Xinjiang Oilfield Company,Karamay 834000,China;Sichuan Provincial Key Laboratory of Oil&Gas Field Applied Chemistry,Chengdu 610500,China;College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]中国石油新疆油田分公司实验检测研究院,新疆克拉玛依834000 [2]油气田应用化学四川省重点实验室,四川成都610500 [3]西南石油大学化学化工学院,四川成都610500

出　　处：《现代化工》2022年第5期162-166,171,共6页Modern Chemical Industry

基　　金：四川省科技计划资助项目(2019YJ0315)。

摘　　要：将N,N-二甲基十八烷基烯丙基氯化铵(C_(18)DMAAC)与丙烯酰胺(AM)、甲基丙烯酰氧乙基三甲基氯化铵(DMC)进行共聚得到一种酸化转向用聚合物PADD,采用单因素法对合成条件进行优化得到反应最佳条件:单体摩尔比n(AM):n(DMC):n(C_(18)DMAAC)为85:15:1.2、单体质量分数为30%、引发剂偶氮二乙丁腈盐酸盐(V50)质量分数为0.4%、反应时间为6 h、反应温度为55℃、反应pH为7。聚合物酸溶液随着酸岩反应的进行持续增黏,并且通过不同酸岩反应时间岩石表面形貌的电镜图得到进一步证实。1.3%PADD酸溶液黏度能从48.0 mPa·s增加至423.0 mPa·s,且残酸具有良好的抗温能力,1.3%PADD残酸黏度在90℃下为213.0 mPa·s,为转向酸在高温地层的应用提供理论支持。PADD,a polymer for acidizing diversion,is obtained through copolymerization among N,N-dimethyl octadecyl allyl ammonium chloride(C18 DMAAC),acrylamide(AM)and methacryloyl oxyethyl trimethyl ammonium chloride(DMC).By means of single-factor method,and the optimal synthesis conditions are obtained as follows:the molar ratio of AM,DMC and C18 DMAAC is 85∶15∶1.2,the monomer concentration is 30%,the initiator concentration is 0.4%,the reaction time is 6 h,the reaction temperature is at 55℃,and pH is 7.The polymer acid solution continues to thicken as the acid-rock reaction is performing,which is confirmed through SEM images of rock surface after different acid rock reaction time.The viscosity of the 1.3%PADD acid solution increases from 48.0 mPa·s to 423.0 mPa·s.Spent 1.3%PADD acid shows a good temperature resistance.The viscosity of spent 1.3 wt.%PADD acid at 90℃is still 213.0 mPa·s,providing theoretical support for the application of diverting acid in high-temperature formations.

关 键 词：酸化 转向 聚合物 非交联 

分 类 号：TE39[石油与天然气工程—油气田开发工程]