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

祝仰文 郭拥军 徐 辉 庞雪君 李华兵

ZHU Yangwen GUO Yongjun XU Hui PANG Xuejun LI Huabing

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 PV 1500 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。

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.

10.19346/j.cnki.1000-4092.2021.02.022