疏水缔合两亲共聚物的溶液性质及其在天然气水合物压裂中的应用  

Solution Properties of Hydrophobic Associating Amphiphilic Copolymers and Their Application in Natural Gas Hydrate Fracturing

作　　者：张毓琨 张志庆[1] 张雨[1] 张国栋[1] 杨春天 ZHANG Yu-kun;ZHANG Zhi-qing;ZHANG Yu;ZHANG Guo-dong;YANG Chun-tian(College of Chemistry and Chemical Engineering,China University of Petroleum(East China),Shandong Qingdao 266580;Anqiu Plasticizer Plant,Shandong Anqiu 262107)

机构地区：[1]中国石油大学(华东)化学化工学院,山东青岛266580 [2]安丘市增塑剂厂,山东安丘262107

出　　处：《胶体与聚合物》2023年第2期76-80,共5页Chinese Journal of Colloid & Polymer

基　　金：中石油重大科技项目;高校基本科研业务费专项资金 “天然气水合物开采的压裂技术研究”(20CX05015A)。

摘　　要：本文合成了新型疏水缔合两亲共聚物,并对其在溶液中的聚集行为和流变特性进行探究。结果表明:随着两亲单体含量的增加,共聚物表现出更低的临界缔合浓度(CAC),可形成更大聚集数的聚集体,在25℃,剪切速率170 s^(-1)下,0.5%共聚物HPAE10-1溶液黏度达205 m Pa·s;触变实验表明疏水缔合作用形成了可逆的网状结构,这种网状结构使共聚物溶液具备了优异的黏弹性能,高频时表现出较高的储能模量和损耗模量;探索了HPAE10-1/有机锆组成的压裂液体系在天然气水合物压裂中的应用性能,发现其对不同粒径的支撑剂都具有良好的悬浮效果、有较低的滤失量,加入破胶剂后在125 min内可使压裂液黏度降低到5 m Pa·s。In this paper,a new hydrophobic associating amphiphilic copolymer was synthesized,and its aggregation behavior and rheological properties in solution were investigated.The results showed that with the increase of the content of amphiphilic monomer,the copolymer exhibited lower critical association concentration(CAC),which could form aggregates with larger aggregation number,The viscosity of 0.5%copolymer HPAE10-1 solution was 205 mPa's at 25℃ and shear rate of 170·s^(-1);The thixotropy experiment showed that the hydrophobic association formed a reversible network structure,The network structure made the copolymer solution had excellent viscoelastic properties,and showed high storage modulus and loss modulus at high frequency.We explored the application performance of HPAE10-1 and organic zirconium fracturing fluid system in natural gas hydrate fracturing.It was found that it had good suspension effect on proppants with different particle sizes,low moisture filtration,and could reduce the viscosity of fracturing fluid to 5 mPa s within 125 min after adding gel breaker.

关 键 词：疏水缔合共聚物 聚集行为 流变性 压裂液 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]