Percolation Model for Polymer Flooding
聚合物驱过程的渗滤模型

In this paper we show that the conventional treatment of polymer velocity enhancement in two phase flow to ill posed model equation when capillary dispersion is not present. A constant enhancement factor results in the accumulation of polymer near the polymer oil shock, irrespective of any lagging effect. We have established a percolation model for the IPV(inaccessible pore volume) velocity enhancement effect. In this model the velocity enhancement factor is a function of the water saturation, which results in hyperbolic system and does not have the elliptic regions and stability problem inherent in models with a constant enhancement factor.