A New Model for Polymer Flooding Performance Prediction

Based on analysis of the difference between polymer flooding and water flooding, an empirical formula for water flooding was modified and a new model for polymer flooding was developed. The main mechanisms of polymer flooding were considered in the new model, including the influence of polymer solution viscosity, injection pore volume, the maximum residual resistance factor, and so on. Predicted polymer flooding water-cut curves of two blocks in Daqing Oilfield were consistent with the real curves. The error of predicted enhanced oil recovery was less than 8%, so it was reliable. The model was simple and fast, and could be used for polymer flooding performance prediction, effect evaluation and potential prediction.