Inhibition of Water-Soluble Cationic Cellulosic Polymers to Clay Hydration

摘要

The inhibition of water-soluble cationic graft terpolymers of hydroxyethyl-cellulose with the vinyl monomers dimethyldiallylamonium chloride and acrylamide to the hydration of water-sensitive clay in oilfields was investigated by clay hydration-swelling tests,XRD analyses,zeta-potential measurements,and SEM observation.It has been shown that grafting enhances the hydration-inhibition effectiveness and the performances of these cationic cellulosic polymers are strongly dependent on their cationicity,relative molecular weight,and solution concentration.