Citation: 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. doi: 10.11944/j.issn.1000-0518.2017.02.160118 shu

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

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

Corresponding author: YI Zhuo, yiz.bjhy@sinopec.com
Received Date: 18 March 2016
Revised Date: 16 May 2016
Accepted Date: 13 July 2016

Fund Project: the China Petroleum & Chemical Corporation Project 212041

Figures(9)

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.
- polyacrylamide,
- viscoelasticity,
- storage modulus,
- loss modulus,
- normal stress difference
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