An Analytical Model for the Early Stages of Polymer Flooding

摘要

The threshold pressure gradient (TPG) was proved existent by laboratory experiments, and the relation between TPG and permeability is obtained. A new analytical method considering TPG, wellbore storage as well as skin effect for polymer flooding is presented. The results of the model are in good agreement with the field data. It is shown that the bottom-hole pressure differential is higher when considering TPG and the injective is reduced with the increase of TPG.