摘要
通过反相乳液聚合法制备了4种聚丙烯酰胺(PAM)微球,利用SEM、1H NMR、粒径分析进行表征,用填砂管封堵实验和总有机碳测试分析了电荷性质和聚乙二醇(PEG)长链对微球封堵性能的影响。将微球与部分水解聚丙烯酰胺(HPAM)复配,考察了微球/HPAM复配体系的封堵性能,以及微球对HPAM黏度和抗剪切性能的影响。实验结果表明,在老化1 d后,接枝PEG微球与石英砂间的吸附减弱,封堵性能降低,有利于微球的深度运移;在老化30 d后,PEG接枝有利于微球吸水膨胀,封堵性能增强;将极少量HPAM与微球复配,就可极大地提高微球的封堵性能,同时可提高HPAM的黏度和抗剪切性能,增强溶液的剪切弹性;改性方法有利于利用聚合物驱后油藏中的残余HPAM实现高效封堵。
Four kinds of polyacrylamide(PAM)microspheres were prepared by inverse emulsion polymerization and were characterized by SEM,1H NMR and size distribution analysis.The effects of charge property and poly(ethylene glycol)(PEG)grafting on the plugging capabilities of microspheres were investigated by sandpacks plugging experiments and total organic carbon analysis.The microspheres were compounded with partially hydrolyzed polyacrylamide(HPAM),the plugging capabilities of the compound systems and the effects of microspheres on viscosity and shear resistance of HPAM were studied.The experimental results show that after aging for 1 d,the adsorption between PEG-grafting microspheres and quartz sand is weakened and the plugging capability is decreased,which is beneficial for migration of microspheres in depth;However,after aging for 30 d,PEG grafting is favourable to the expansion of microspheres and the efficient plugging of sandpacks.When compounding with tiny amount of HPAM,the plugging capability of microspheres can be significantly improved.Meanwhile,the viscosity and shear resistance of HPAM are increased,and the shear elasticity of solution is improved.This modified method is beneficial to realize efficient plugging by using the residual HPAM in the reservoir after polymer flooding.
作者
孙慧
苏智青
许汇
夏燕敏
李应成
Sun Hui;Su Zhiqing;Xu Hui;Xia Yanmin;Li Yingcheng(Sinopec Key Laboratory of Surfactants for EOR,Sinopec Shanghai Research Institute of Petrochemical Technology,Shanghai 201208,China)
出处
《石油化工》
CAS
CSCD
北大核心
2021年第11期1133-1140,共8页
Petrochemical Technology
基金
中国石油化工股份有限公司“十条龙”项目(217007)。
关键词
聚丙烯酰胺微球
封堵
聚乙二醇接枝
部分水解聚丙烯酰胺
复配体系
polyacrylamide microsphere
plugging
poly(ethylene glycol)grafting
partial hydrolyzed polyacrylamide
compound system
作者简介
孙慧(1990-),女,上海市人,博士,工程师,电话:021-68462197-9420,电邮:sunhui.sshy@sinopec.com。
