摘要
采用蠕动实验研究了部分水解聚丙烯酰胺(HPAM)和聚乙烯醇(PVA)混合溶液(总质量分数为0.20%)的流变性(零剪切黏度),主要考察了体系组成比(以HPAM在聚合物中所占质量分数表示,RPH)和电解质(NaCl)浓度(cNaCl)对流变性的影响,并对HPAM和PVA分子间相互作用机理进行了探讨。结果表明,PVA可通过氢键与HPAM络合(或交联)形成高分子复合物,其络合PVA/HPAM摩尔比约为90。RPH在0数0.7范围内,HPAM和PVA混合产生黏度降低效应,其中在RPH=0.2时黏度降低效应最强。而RPH在0.7数1.0范围内,基本无黏度效应。加入NaCl可使混合溶液(RPH=0.20)产生复合增黏效应,表明聚合物复配可提高HPAM溶液的抗盐能力。本研究加深了对聚合物相互作用行为的认识,为基于HPAM的复配体系在强化采油工程中的应用研究提供了重要信息。
The rheological properties(zero-shear viscosities)of aqueous solutions containing partially hydrolyzed polyacrylamide(HPAM)and poly(vinyl alcohol)(PVA)were investigated by creep tests at a total mass fraction of 0.20%,and the effect of the mass fraction of HPAM in the two polymers(RPH)and electrolyte(NaCl)concentrations(cNaCl)on the rheological properties was discussed. The interaction mechanism between HPAM and PVA was probed. The results showed that the interpolymer complex could form between HPAM and PVA via hydrogen bonds,and the PVA/HPAM complex molar ratio was about 90. At 0 0.7,no obvious viscosity effect was observed. The presence of NaCl could lead to a"viscosity increase effect"for PVA/HPAM mixed solution(RPH=0.20),suggesting that the mixing of PVA with HPAM could enhance the salt resistance of HPAM solutions. This work deepened the understanding of interpolymer interaction behavior and provided important information for the application of HPAM-based composites in the enhanced oil recovery.
作者
刘希明
田玉芹
刘伟伟
唐延彦
张冬会
侯万国
LIU Ximing;TIAN Yuqin;LIU Weiwei;TANG Yanyan;ZHANG Donghui;HOU Wanguo(Petroleum Engineering Technology Research Institute,Shengli Oilfield Branch Company,Sinopec,Dongying,Shandong 257000,P R of China;Key Laboratory for Colloid and Interface Chemistry(Ministry of Education),Shandong University,Jinan,Shandong 250100,P R of China)
出处
《油田化学》
CAS
CSCD
北大核心
2020年第1期115-120,共6页
Oilfield Chemistry
基金
国家“十三五”重大专项课题“致密油气开发环境保护技术集成及关键装备”(项目编号2016ZX05040-005)
中石化重点科技攻关项目“油田开发废液废固资源化利用技术与装备研制”(项目编号P18048-2)。
关键词
部分水解聚丙烯酰胺
聚乙烯醇
复合物
流变性
黏度
氢键
partially hydrolyzed polyacrylamide
poly(vinyl alcohol)
interpolymer complexes
rheology
viscosity
hydrogen bond
