耐温抗盐疏水缔合聚合物的制备与性能评价  

Preparation and Performance Evaluation of Hydrophobically Associating Polymer with Temperature Resistance and Salt Tolerance

作　　者：祝仰文[1] 郭拥军[2] 徐辉[1] 庞雪君[1] 李华兵 ZHU Yangwen;GUO Yongjun;XU Hui;PANG Xuejun;LI Huabing(Exploration and Development Research Institute,Shengli Oilfield Branch Company,Sinopec,Dongying,Shandong 257015,P R of China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,P R of China;Sichuan Guangya Polymer Chemical Company,Ltd,Nanchong,Sichuan 637500,P R of China)

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东东营257015 [2]油气藏地质及开发工程国家重点实验室(西南石油大学),四川成都610500 [3]四川光亚聚合物化工有限公司,四川南充637500

出　　处：《油田化学》2021年第2期317-323,共7页Oilfield Chemistry

基　　金：国家科技重大专项“高温高盐油田化学驱提高采收率技术”(项目编号2016ZX05011-003)。

摘　　要：传统的聚合物驱油剂难以满足耐温耐盐和长期老化热稳定性的要求。以N-苯乙基-N-十二烷基甲基丙烯酰胺(PEDMAM)为疏水单体、2-甲基-2-丙烯酰胺基丙磺酸(AMPS)为功能单体,与丙烯酰胺(AM)共聚制备了水溶性疏水缔合聚合物PSA,考察了最优单体(AM、AMPS、PEDMAM)质量比为83∶15∶2时共聚物的综合性能。结果表明,与传统的部分水解聚丙烯酰胺(HPAM)相比,三元共聚物PSA具有良好的增黏性能、耐温耐盐性、抗剪切性、老化稳定性及驱油性能。在85℃和32 g/L矿化度(钙镁质量浓度800 mg/L)条件下,1500 mg/L PSA溶液的黏度为16.3 mPa·s;在85℃无氧条件下老化60 d后的黏度保留率>80%。室内岩心驱替实验表明,0.7 PV1500 mg/L PSA可在水驱基础上提高采收率35.05%,比相近黏度的HPAM(3000 mg/L)高12.35百分点,具有明显的驱油优势。图8表3参19.It is very difficult for the conventional polymer flooding agent to meet the requirements of temperature resistance,salt tolerance and long-term aging thermal stability.The water-soluble hydrophobically associating polymer(PSA)was prepared by the copolymerization with acrylamide(AM)using N-phenethyl-N-dodecylmethacrylamide(PEDMAM)as associative monomer and 2-acrylamide-2-methylpropanesulfonic acid(AMPS)as functional monomer.In addition,the comprehensive properties of PSA prepared at an optimum monomer(AM∶AMPS∶PEDMAM)mass ratio of 83∶15∶2 were investigated.The results showed that,compared with partially hydrolyzed polyacrylamide(HPAM),PSA had good tackifying capacity,temperature resistance,salt tolerance,shear resistance,aging stability and oil displacement performance.Under the condition of 85℃and 32 g/L salinity with 800 mg/L the mass concentration of Ca2+and Mg2+,the viscosity of 1500 mg/L PSA solution was 16.3 mPa·s,and the retention rate of viscosity was more than 80%after anaerobic oxygen aging for 60 days at 85℃.Moreover,the results of laboratory core displacement experiment showed that 0.7 PV 1500 mg/L PSA could further enhance the oil recovery by 35.05%over water injection,which was greater than that of 3000 mg/L HPAM with similar viscosity by 12.35 percentage points.PSA had significant advantage in oil displacement.

关 键 词：疏水缔合聚合物 三元共聚物 耐温抗盐 水溶性 稳定性 提高采收率 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程] TQ317[化学工程—高聚物工业]