Viscoelasticity of Temperature-Tolerant and Salt-Resistant Flooding Polymer Solutions

doi:10.11944/j.issn.1000-0518.2017.02.160118

Chinese Journal of Applied Chemistry ›› 2017, Vol. 34 ›› Issue (2): 187-194.DOI: 10.11944/j.issn.1000-0518.2017.02.160118

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Viscoelasticity of Temperature-Tolerant and Salt-Resistant Flooding Polymer Solutions

YI Zhuo(),LIU Xi,FANG Zhao,DU Chao,HU Xiaona,ZHANG Wenlong,ZHU Lunyu

Beijing Research Institute of Chemical Industry,China Petroleum & Chemical Corporation,Beijing 100013,China

Received:2016-03-18 Accepted:2016-07-13 Published:2017-01-18 Online:2017-01-18
Contact: YI Zhuo
Supported by:
Supported by the China Petroleum & Chemical Corporation Project(No.212041)

Abstract

Abstract:

The effects of mass concentration and salinity on the viscoelasticity of three temperature-tolerant and salt-resistant flooding polymers(high molecular mass polyacrylamide(HPAM), sulfonated polyacrylamide(S-HPAM) and hydrophobic associating polyacrylamide(A-HPAM)), were investigated through the dynamic and steady state shear test at 85 ℃. The results show that the higher the mass concentration, the higher the storage modulus(G') and the loss modulus(G″). The apparent viscosity of polymer solutions decreases with the increase of the shear rate. The normal stress difference(N₁) of polymer solutions was calculated by using dynamic experimental data. With the increase of the solution concentration, N₁ gradually increases. With the increase of salinity, N₁ appears different salt sensitive areas, which shows that elastic responses of polymer solutions to salinity are different. The study provides the theoretical reference for the choice and development of flooding polymers of high temperature and high salt reservoir.

Key words: polyacrylamide, viscoelasticity, storage modulus, loss modulus, normal stress difference

YI Zhuo, LIU Xi, FANG Zhao, DU Chao, HU Xiaona, ZHANG Wenlong, ZHU Lunyu. Viscoelasticity of Temperature-Tolerant and Salt-Resistant Flooding Polymer Solutions[J]. Chinese Journal of Applied Chemistry, 2017, 34(2): 187-194.

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Viscoelasticity of Temperature-Tolerant and Salt-Resistant Flooding Polymer Solutions

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