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Stress Calculation of Polymer Displacing Residual Oil in Micro Pores

Volume 13, Number 2, March 2017 - Paper 10 - pp. 211-220


Key Laboratory of Enhanced Oil and Gas Recovery of Education Ministry at Northeast Petroleum University, Daqing163318, Heilongjiang, China

(Received on September 03, 2016, revised on October 16, 2016)


To analyze and calculate the micro-scale stress of viscoelastic fluid in displacing residual oil and explore the rheological property of non-Newtonian fluid from hydrodynamics angle, an upper-convected Maxwell constitutive equation was selected to simulate viscoelastic fluid. Furthermore, boundary conditions were adopted to calculate the flow field of flow, and the normal deviatoric stress and horizontal stress difference acting on residual oil from viscoelastic fluid were calculated by combining stress tensor theory. The calculated result showed that: the viscosity, elasticity and flow rate of polymer solution are key factors influencing stress and deformation of residual oil. Therefore, methods like increasing mass concentration and molecular mass of polymer solution can be applied to enlarge viscosity and elasticity of polymer solution, thus increasing the displacement stress acting on residual oil and laying foundation for further analysis on deformation and breakup of residual oil.


References: 10

[1] Yin H J, Wang D M, Zhong H Y et al. Flow Characteristics of viscoelastic polymer solution in micro-pores. SPE154640, 2012.
[2] Yin Hongjun, Jiang Haimei, Su Yuchi, et al. Flow behavior of viscoelastic polymer solution in the expansion channel. Acta Polymeric Sinica, 2009,10(6): 520-529.
[3] Xia Huifen, Ye Ju and Fan Shun Kong. Effect of elastic behavior of HPAM solutions on Displacement Efficiency on mixed wettability conditions. SPE90234, 2004.
[4] Xia Huifen, Wang Demin, Zhang Jiuran et al. Quantitative description of contribution of elasticity of polymer solution to oil displacement efficiency. Journal of China University of Petroleum (Edition of Natural Science), 2012, 36(4): 166-176.
[5] Xia Hui-fen, Wang Demin, Wang Gang, et al. Elastic behavior of polymer solution to residual oil at dead –end. Acta Petrolei Sinica, 2006, 27(2): 72-76.
[6] Ryan R. wilton, Farshid Torabi. Rheological Assessment of the Elasticity of Polymers for Enhanced Heavy Oil Recovery. SPE 165488, 2013.
[7]  Sandiford B B. Laboratory and field studies of water floods using polymer solutions to increase oil recoveries. JPT, 1964,16(8): 911-916.
[8]  Pearson J R A, Tardy, P M J. Models for flow of non-Newtonian and complex fluids through porous media. Non-Newtonian Fluid Mech, 2002,10(2): 447-473.
[9]  Duda J L, Klus E E. Flow of polymer solutions in porous media: inadequacy of the capillary model. Ind. Eng. Chem. Fundam,1983, 22(3): 299-305.
[10]  Mason G, Morrow N R. Capollar behavior of a perfectly wetting liquid in irregular triangular tubes. Colloid Interface Sci,1991,141(1): 262-274.


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