高温延迟交联聚合物堵漏剂的制备与性能  

Preparation and Performance of a High Temperature Delayed Crosslinking Polymer Plugging Agent

作　　者：吕军贤 卓绿燕 ALAIN Pierre Tchameni 陈璐鑫 谢彬强[1] LYU Junxian;ZHUO Lüyan;ALAIN Pierre Tchameni;CHEN Luxin;XIE Binqiang(Petroleum Engineering,Yangtze University,Wuhan,Hubei 430100,P R of China)

机构地区：[1]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601-607,共7页Oilfield Chemistry

基　　金：中国石油化工股份有限公司西北分公司科研项目“顺北一区5号断裂带提质提速钻完井技术研究——一井多靶大缝洞专堵技术评价与优化”(项目编号202105ZB0015)。

摘　　要：针对目前凝胶堵漏材料注入性差、高温成胶时间短等问题,以丙烯酰胺、2-丙烯酰胺-2-甲基丙磺酸为单体,偶氮二异丁脒盐酸盐为引发剂,聚乙烯亚胺和N,N’-亚甲基双丙烯酰胺为交联剂,以自由基聚合与聚合物交联相结合的方法,研发了一种具有成胶强度高、高温成胶时间可控等优点的高温延迟交联聚合物堵漏剂PM-1,并通过正交实验和单因素实验得到了PM-1的最优制备条件,评价了PM-1的注入性、成胶性和堵漏性,并分析了PM-1的高温延迟交联机理。结果表明,堵漏剂PM-1的最佳制备条件为:单体质量分数为10%(AM、AMPS物质的量比为4∶1),聚乙烯亚胺加量为0.4%,N,N’-亚甲基双丙烯酰胺加量为0.2%,偶氮二异丁脒盐酸盐加量为0.1%,自制聚合物BRZ加量为1.2%;该堵漏剂具有良好的注入性能;堵漏剂在130℃下老化96 h后仍可封堵粒度1.7~4 mm的砂层,与惰性材料所形成的复合凝胶对5 mm的裂缝漏层承压能力达6 MPa;添加0.4%聚乙烯亚胺能够使堵漏剂的交联时间延长3~5 h,可保证地下交联凝胶堵漏施工的顺利进行。Taking into account of the current challenges of poor injectability and a short gelation period of conventional gel plugging materials,a high-temperature delayed cross-linked polymer plugging agent(PM-1)was developed through a synergistic approach combining free radical polymerization and cross-linking reaction using acrylamide(AA)and 2-acrylamide-2-methylpropane sulfonic acid(AMPS)as reaction monomers,azobisisobutyronitrile hydrochloride as initiator,and polyethyleneimine and N,N'-methylenebisacrylamide(MBA)as cross-linking agents.Optimal synthetic conditions for PM-1 were determined via orthogonal and single-factor experiments.The injectability,gelation performance,and plugging efficiency of PM-1 was evaluated,and the delayed cross-linking mechanism of PM-1 at high-temperature was probed.The optimal synthetic conditions for PM-1 was as follows,mass fraction of monomers was 10%and mole ratio of AM to AMPS was 4∶1,polyethyleneimine and N,N'-methylenebisacrylamide(MBA)dosage was 0.4%and 0.2%,azobisisobutyronitrile hydrochloride dosage was 0.1%and polymer BRZ dosage was 1.2%.the injectability of the PM-1 was good.After aging for 96 h at the temperature of 130℃,PM-1 could still effectively plug sand layers with meth size of 1.7—4 mm and exhibit a pressure-bearing capacity of 6 MPa for 5 mm fractured layers when combined with inert materials to form a composite gel.Intriguingly,the addition of 0.4%polyethyleneimine extended the cross-linking plugging time of PM-1 to about 3—5 h,which was essential to ensure the smooth construction of underground crosslinking gel plugging.

关 键 词：聚合物凝胶 堵漏剂 延迟交联 堵漏性能 

分 类 号：TE254.4[石油与天然气工程—油气井工程]