高温油藏耐盐聚合物P(AM/MAPS)驱油剂的制备与性能评价  

Study on Oil Displacement Agent of Salt Tolerance Polymer P(AM/MAPS)for High Temperature Reservoir

作　　者：宁长元 张亮[1] 潘若生 康万利[1] 李哲 杨红斌[1] 周博博 蒋海壮 NING Changyuan;ZHANG Liang;PAN Ruosheng;KANG Wanli;LI Zhe;YANG Hongbin;ZHOU Bobo;JIANG Haizhuang(School of Petroleum Engineering,China University of Petroleum(East China),Qingdao,Shandong 266580,P R of China;Oil and Gas Engineering Research Institute,Jilin Oilfield Branch Company,PetroChina,Songyuan,Jilin 138000,P R of China)

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中国石油吉林油田公司油气工程研究院,吉林松原138000

出　　处：《油田化学》2023年第3期460-466,共7页Oilfield Chemistry

基　　金：国家自然科学基金重点项目“高效耐盐两亲聚合物超分子包合驱油体系增效方法及作用机理”(项目编号52130401);中国石油集团股份公司重大专项课题“松辽盆地(大庆、吉林)CCUS技术集成与工业化试验”(项目编号2021ZZ01-08)。

摘　　要：随着聚合物驱广泛应用,部分水解聚丙烯酰胺(HPAM)在高温高盐油藏中存在易水解、增黏能力较差的问题。为满足目前日益苛刻的储层开采条件,首先利用烯丙基氯与N-甲基牛磺酸钠合成一种耐盐功能单体3-(N-烯丙基-N-甲基氨基)丙烷-1-磺酸钠(MAPS),进一步与丙烯酰胺(AM)共聚合成了一种新型耐盐聚合物P(AM/MAPS);红外光谱法、核磁氢谱法表征证实为目标产物。采用流变仪系统研究了浓度、温度、矿化度及剪切速率对新型耐盐聚合物溶液黏度的影响规律。结果表明,在温度为85℃、矿化度为3×10^(4)mg/L的油藏条件下,质量浓度为2000 mg/L的P(AM/MAPS)耐盐聚合物溶液的表观黏度达到14.20 mPa·s。在渗透率为527.73×10^(-3)μm^(2)的单管填砂管中,P(AM/MAPS)可在水驱基础上提高采收率13.42百分点;在高低渗透率分别为882.79×10^(-3)、422.53×10^(-3)μm^(2)的双管并联填砂管中,总采收率可提高9.27百分点。该耐盐聚合物P(AM/MAPS)能够高效用于高温高盐油藏聚合物驱提高采收率技术。With the application of polymer flooding,partially hydrolyzed polyacrylamide(HPAM)has the problems of easy hydrolysis and low viscosity in high-temperature and high-salinity(HTHS)reservoir.To meet the requirement of harsh reservoir,a salt-resistant monomer 3-(N-allyl-N-methylamino)propane-1-sulfonate sodium(MAPS)was synthesized using allyl chloride and sodium N-methyl taurate as main materials,and MAPS and acrylamide(AM)were further copolymerized to form a novel salt-resistant polymer P(AM/MAPS).The product was characterized by infrared spectroscopy and nuclear magnetic hydrogen spectroscopy.The effects of concentration,temperature,salinity and shear rate on the viscosity of P(AM/MAPS)were studied by rheometer.The results showed that the viscosity of P(AM/MAPS)solution with mass concentration of 2000 mg/L reached 14.20 mPa·s under the conditions of the temperature of 85℃and salinity of 3×10^(4) mg/L.In one-dimensional displacement experiment with permeability of 527.73×10^(-3)μm^(2) sand pack tube,P(AM/MAPS)could enhanced oil recovery by 13.42%on the basis of water flooding,and the total recovery rate of the double-pipe parallel core with permeability of 882.79×10^(-3),422.53×10^(-3)μm^(2) could enhanced by 9.27%.The salt-resistant polymer P(AM/MAPS)could be efficiently used in polymer flooding technology for HTHS reservoir to enhanced oil recovery.

关 键 词：高温高盐油藏 耐盐聚合物 流变性能 提高采收率 驱油效果 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]