AA-AM-SBMA三元共聚物增稠剂合成及性能
Synthesis and properties of AA-AM-SBMA terpolymer thickener
李河金 1覃孝平 2杨辉 3韩东 3彭通 3李翠霞 1田海洋 2赵彬1
作者信息
- 1. 四川轻化工大学 化学工程学院,四川 自贡 643000
- 2. 四川轻化工大学 化学工程学院,四川 自贡 643000;聚合物分子工程国家重点实验室(复旦大学),上海 200438
- 3. 中国石油冀东油田西部分公司,陕西 榆林 719000
- 折叠
摘要
采用水溶液聚合法,以丙烯酸(AA)、丙烯酰胺(AM)和两性单体甲基丙烯酰乙基磺基甜菜碱(SBMA)为主要原料,过硫酸铵-亚硫酸氢钠为引发剂体系,合成出压裂用低伤害三元共聚物增稠剂AA-AM-SBMA.采用红外光谱、核磁共振氢谱、扫描电镜等对AA-AM-SBMA的结构进行了表征.结果表明,在35℃下采用注入水配制时,AA-AM-SBMA的增黏、悬砂性能与部分水解聚丙烯酰胺(HPAM)相当;当配液水的氯化钠浓度大于3 000 mg/L时,AA-AM-SBMA能表现出较强的耐盐性能;配液水的氯化钠浓度为 6 000 mg/L时,3 000 mg/L的AA-AM-SBMA溶液的表观黏度比相同条件下的HPAM溶液高58.4%.AA-AM-SBMA在120℃下放置2h的降解率高达95.13%,比相同条件下HPAM的降解率高3.19%.岩心渗透率恢复率测定实验结果表明,AA-AM-SBMA对应的渗透率恢复率为95.27%,比相同条件下HPAM的高4.52%,表明SBMA的引入有利于降低增稠剂对岩心渗透率的伤害.
Abstract
A low damage ternary copolymer thickener AA-AM-SBMA for fracturing was synthesized by a-queous solution polymerization using acrylic acid(AA),acrylamide(AM),and amphoteric monomer methacrylethyl sulfobetaine(SBMA)as the main raw materials,with ammonium persulfate sodium bisul-fite as the initiator system.The structure of AA-AM-SBMA was characterized by infrared spectroscopy,nu-clear magnetic resonance hydrogen spectroscopy,scanning electron microscopy,etc.The result showed that when prepared with injected water at 35℃,the viscosity and suspension properties of AA-AM-SBMA were comparable to those of partially hydrolyzed polyacrylamide(HPAM);when the concentration of sodi-um chloride in the mixing water was greater than 3 000 mg/L,AA-AM-SBMA could exhibit strong salt re-sistance;when the concentration of sodium chloride in the preparation water was6 000 mg/L,the apparent viscosity of AA-AM-SBMA solution at 3 000 mg/L was 58.4%higher than that of HPAM solution under the same conditions.The degradation rate of AA-AM-SBMA at 120℃for 2 h were 95.13%,which were 3.19%higher than that of HPAM under the same conditions.The results of core permeability recovery rate measurement showed that the permeability recovery rate corresponding to AA-AM-SBMA was 95.27%,4.52%higher than that of HPAM under the same conditions,indicating that the introduction of SBMA was beneficial for reducing the damage of thickeners to core permeability.
关键词
压裂液/共聚物/增稠剂/热降解/低伤害Key words
fracturing fluid/copolymer/thickener/thermal degradation/low damage引用本文复制引用
基金项目
四川省科技计划重点研发计划(2023YFG0209)
聚合物分子工程国家重点实验室(复旦大学)开放研究课题(K2022-17)
出版年
2024
NETL
NSTL
万方数据