Chemical & Petroleum Engineering Department, Sharif University of Technology, Tehran, Iran
In this study, a chemical additive made by a combination of polymer, alkaline, and silica nano particles is used to control the oil recovery and relative permeability curves. Various parameters including the type and concentration of polymer, alkaline, and nanosilica particles have been studied. To evaluate the efficiency of these additives, we performed unsteady state displacement experiments under the JBN method and determined the pressure gradient across the core samples. The experimental observations emphasized that by using the appropriate chemical additives the relative permeability of the phases is changed towards higher oil relative permeability values, which results in the oil recovery. The results of this study can improve the chemical flooding for heavy oil recovery.