Numerical Calculation of Viscous-Elastic Fluid Flooding Residual Oil Film in the Complex Pore

In order to analyze the stress and deformation of different permeability of residual oil film in the complex pore, which are affected by the viscous-elasticity of the fluid, the hydrodynamic displacement mechanism is explored from the stand-point of hydrodynamics, that is, the residual oil film displaced by alternating injection of different concentrations of the polymer solution, viscous-elastic fluid flow equation is established in the complex pore by choosing continuity equation, motion equation and the upper convected Maxwell constitutive equation. The flow field is computed by using the method of numerical analysis. Not only the stress and deformation of residual oil film on the different permeability of micro pores, but also the analysis of the flooding mechanism of alternating injection of different concentrations of the polymer solution is got. The results show that the larger the viscous-elasticity of polymer solution is, the bigger the normal deviatoric stress acting on the residual oil film is; the distribution of normal deviatoric stress has the abrupt change. The stronger the viscous-elasticity of the polymer solution is, the bigger the horizontal stress difference acting on the residual oil film is and the more obvious the deformation is; the high-concentration polymer solution is suitable for high-permeability micro pores. Low-concentration polymer solution is suitable for medium and low-permeability micro pores. Alternating injection of polymer solution can improve Volumetric Sweep Efficiency and increase the deformation of residual oil film, which is conducive to enhancing oil recovery.

Cite this paper

L. Liu, C. Yu, L. Wang and L. Liu, "Numerical Calculation of Viscous-Elastic Fluid Flooding Residual Oil Film in the Complex Pore," Open Journal of Fluid Dynamics, Vol. 3 No. 3, 2013, pp. 147-151. doi: 10.4236/ojfd.2013.33019.

Conflicts of Interest

The authors declare no conflicts of interest.

 [1] X. G, Yue, Y. F. Wang, K. L. Wang, et al., “Enhance Oil Recovery Foundation,” Publishing House of Oil Industry, Beijing, 2002. [2] J. H. Zhang, X. Dong, Y. Z. Ye, et al., “Flooding Effects of Alternating Injection of Gel and Surfactant after Polymer Flooding,” Journal of Daqing Petroleum Institute Contents, Vol. 34, No. 2, 2010, pp. 85-88. [3] Z. L. Zhang and M. S. Wang, “Flooding Physical Simulation of Alternating Injection of Foam with the AS System after polymer Flooding,” Oilfield Chemistry, Vol. 23, No. 2, 2006, pp. 166-172. [4] S. F. Ha, “Constitutive Equation and Computational Analytical Theory of Non-Newtonian Fluids,” Science Press, Beijing, 2002. [5] L. L. Liu, L. H. Wang, Y. Zhang, et al., “Mechanical Analysis of Stress Acted on Residual Oil Film by Polymer Solution,” Xinjiang Petroleum Geology, Vol. 31, No. 5, 2010, pp. 533-535. [6] D. M. Wang, J. C. Cheng, Q. Y. Yan, et al., “Viscous-Elastic Polymer Can Increase Micro Scale Displacement in Cores,” SPE 63227, 2000, pp. 2-8. [7] H. J. Yin, D. M. Wang, H. Y. Zhong, et al., “Study on Flow Behaviors of Viscoelastic Polymer Solution in Micro Pore with Dead End,” SPE 101950, 2001, pp. 4-15. [8] X. H. Liu, “A Biomechanical Model for Simulating the Deformation of a Leukocyte Adhered to the Surface of a Blood Vessel under Steady Shear Flow,” Journal of Biomedical Engineering, Vol. 20, No. 1, 2003, pp. 30-34.