Rheological properties of poly(acrylamide-co-sodium acrylate) and poly(acrylamide-co-sodium vinylsulfonate) solutions
Poly(acrylamide-co-sodium acrylate) (PAM/AA-Na) and poly(acrylamide-co-sodium vinylsulfonate) (PAM/VSS-Na) were prepared by inverse emulsion polymerization. The effects of CaCl2 on PAM/VSS-Na or PAM/VSS-Na aqueous solutions were investigated by steady-flow experiments at 25, 40, 55 and 7℃. The results show that the apparent viscosities of both solutions decrease with addition of CaCl2 or increase of temperature and shear rates. PAM/VSS-Na solution has better performance on the salt tolerance, shear endurance and temperature resistance due to containing sulfonic group in the molecules. Ca2+ concentration can affect the viscous activation energy of both solutions and the reason may be that these interactions between Ca2+ and also copolymer molecules are related to temperature and competitive in solution. These results may offer the basic data for searching the flooding systems with the ability of temperature resistance, salt tolerance and shear endurance for tertiary oil recovery.
polyacrylamide sodium vinylsulfonate rheological properties salt tolerant temperature resistant
CAO Jie(曹杰) CHE Yu-ju(车玉菊) CAO Xu-long(曹绪龙) ZHANG Ji-chao(张继超) WANG Hong-yan(王洪艳) TAN Ye-bang(谭业邦)
School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China Research Institute of Geology, Shengli Oilfield Company, Dongying 257000, China
国际会议
长沙
英文
107-110
2008-09-28（万方平台首次上网日期，不代表论文的发表时间）