Saeid Morshedi - Department of Chemical and Petroleum Engineering,Sharif University of Technology, Tehran, Iran
Sajjad Foroughi - Department of Chemical and Petroleum Engineering,Sharif University of Technology, Tehran, Iran
Mohamad Torkaman - Department of Chemical and Petroleum Engineering,Sharif University of Technology, Tehran, Iran
Mohamad Hosein Ghazanfari - Department of Chemical and Petroleum Engineering,Sharif University of Technology, Tehran, Iran

One of the methods that is used nowadays in enhanced oil recovery is surfactant flooding . The main mechanisms of surfactant flooding in reservoir consist of reduction of interfacial tension between water and oil and modification of rock wettability. In this article, we simulate the surfactantinjection process in Darcy scale and in one dimensional, multicomponent, multiphase state and effects of physical phenomena such as adsorption, dispersion, convection and exchange between fluids and solids are considered. Wettability alteration of reservoir rock due to presence of surfactantin injected fluid is detected in relative permeability and capillary pressure curves. First, we express the governing flow equations in the system and then discretize them. The variables consist of waterand oil saturations, surfactant concentration in water phase, water and oil pressures and velocities ineach block. Second, the discretized equations are solved by IMPES method and pressure and saturation variables are calculated and after that, the concentration of surfactant in water phase is calculated. Finally, results of simulation are shown

Numerical Simulation, Surfactant Flooding, Enhanced Oil Recovery, Co-current Imbibition, Relative Permeability