高温高盐油藏驱油聚合物的合成及应用  

Synthesis and Application of Flooding Polymer for High Temperature and High Salinity Reservoirs

作　　者：王斌[1] WANG Bin(Petroleum Engineering Institute,Zhongyuan Oilfield Branch Company,SINOPEC,Puyang 457001,China)

机构地区：[1]中国石化股份有限公司中原油田分公司石油工程技术研究院,河南濮阳457001

出　　处：《化学反应工程与工艺》2019年第5期442-449,共8页Chemical Reaction Engineering and Technology

基　　金：中国石化重大科研项目(215054)。

摘　　要：针对常规驱油用聚丙烯酰胺在高温高盐Ⅲ类油藏条件下热稳定性差和抗剪切能力弱的问题,以丙烯酰胺(AM)和2-丙烯酰胺基-2-甲基丙磺酸(AMPS)作为主要单体,引入自制的耐水解单体(APS-3),合成一种新型耐温抗盐聚合物。研究了引发剂、pH值和引发温度对驱油用聚合物黏均分子量的影响,对合成聚合物的耐温、抗盐、热稳定及抗剪切等应用性能进行测试。结果表明:在引发剂质量分数为0.40%,pH值为7~9,温度为25℃时能够合成黏均分子量达2.0×10^7以上的耐温抗盐聚合物。该聚合物在80℃、矿化度10×10^4 mg/L的条件下,老化100 d后黏度保留率为80.04%,满足高温高盐Ⅲ类油藏聚合物驱油的需求。该产品在中原油田6个井组开展应用,综合含水降低2.10%,采收率提高2.45%。In view of the poor thermal stability and shear resistance of conventional polyacrylamide under the conditions of high temperature and high salinity class III reservoir,a new type of temperature tolerant and salt resistant polymer was synthesized by using acrylamide(AM)and 2-acrylamido-2-methylpropane sulfonic acid(AMPS)as the main monomers and introducing self-made hydrolysis resistant monomers(APS-3).The effects of initiator dosage,pH value and initiation temperature on viscosity-average molecular weight of polymer for oil displacement were studied.The application properties of the synthesized polymer,such as temperature resistance,salt resistance,thermal stability and shear resistance were tested.The results showed that temperature and salt resistant polymer with viscosity-average molecular weight more than 2.0×10^7 could be synthesized under the condition of initiator 0.40%,pH value 7-9 and temperature 25℃.The viscosity retention rate of the polymer was 80.04%after 100 days under the condition of 80℃and salinity of 10×10^4 mg/L,which meet the demand of polymer flooding in high temperature and high salinity class III reservoir.The product had been applied in six well groups in Zhongyuan oilfield,the comprehensive water cut had been reduced by 2.10%and the recovery had been increased by 2.45%.

关 键 词：驱油聚合物 高温高盐油藏 耐温抗盐 黏度 

分 类 号：O631.3[理学—高分子化学]