Numerical Simulation Of Flow Field In Cylindrical Chamber Injection Allocation With Submerged Jet

After major reservoirs in DaqingOilfield are completed, ASP flooding target has been converted to the second and third grade reservoirs with lower permeability and much interlayer difference. Separate injection technology is facing new contradictions. ASP flooding quality sorting injection technolog can realize double adjustment of molecul weight and injection rate, without lowering overall development effect of the high permeability layer, and effectively increase volume which injected into low permeability oil layer, so as to enhance the effect of ASP flooding. As to the problem mentioned above, the cylindrical chamber injection allocation with submerged jet is developed. The pressure drop and the viscosity loss of ASP solution flowing through this new injection allocation can be changed by adjusting nozzle diameter, to adjust the matching relationship between polymer molecul weight and oil layer.In this paper, the geometric models are set up by FLUENT 6.3 software. ASP solution flowing through the cylindrical chamber injection allocation with submerged jet is simulated using the standard k-εturbulence model and SIMPLEC algorithm. The distribution of velocity, pressure and apparent viscosity in flow field were obtained, respectively. The influences of nozzle divergence angle and diameter on the distribution of velocity, pressure and apparent viscosity were analyzed. Finally, the numerical simulation results is verified by experiment. The results mentioned above have foundation for the optimizing of geometrical parameter size of the cylindrical chamber injection allocation with submerged jet and theoretical guidance significance.