Study on improving viscosity of polymer solution based on complex reaction

2018 5th Global Conference on Polymer and Composite Materials

材料科学;化学

Sun, G.^1 ; Li, D.^1 ; Zhang, D.^2 ; Xu, T.H.^2

Exploration and Development Research Institute, Daqing Oilfield Company Ltd., Daqing, Heilongjiang

163712, China^1

Northeast Petroleum University, Daqing, Heilongjiang

163318, China^2

关键词: Complex reactions;    Divalent metal ion;    High-salinity reservoirs;    Increasing viscosity;    Oil reservoirs;    Polymer flooding technologies;    Polymer molecule;    Solution viscosity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/369/1/012045/pdf
DOI  :  10.1088/1757-899X/369/1/012045

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The current status of polymer flooding Technology on high salinity oil reservoir is not ideal. A method for increasing the viscosity of polymer solutions is urgently needed. This paper systematically studied the effect of ions with different mass concentrations on the viscosity of polymer solutions. Based on the theory of complex reaction, a countermeasure of increasing viscosity of polymer solution under conditions of high salinity reservoir was proposed. The results show that Ca2+and Mg2+have greater influence on the solution viscosity than K+and Na+. When the concentration of divalent ions increases from 0 mg/L to 80 mg/L, the viscosity of the polymer solution decreases from 210 mPa•s to 38.6 mPa•s. The viscosity of the polymer solution prepared from the sewage treated with the Na2C2O4increased by 25.3%. Atomic force microscopy test results show that Na2C2O4can effectively shield the divalent metal ions, so that the polymer molecules in the solution stretch more, thereby increasing the solution viscosity. Atomic force microscopy test results show that Na2C2O4can effectively shield the divalent metal ions, so that the polymer molecules in the solution stretch more, thereby increasing the solution viscosity.