Emulsion injection has been studied as an enhanced oil recovery method, leading to an increase on the recovered oil volume by mobility control of injected fluid and increase of oil displacement efficiency. The use of this method requires understanding the flow both in pore and reservoir scales. The effect of emulsion on the two phase flow is modeled by using relative permeability curves that vary with the concentration of the dispersed phase of the emulsion. Those curves describe two physical phenomena observed on these flows: control of mobility, represented by a lower relative permeability of the aqueous phase due to the presence of droplets and improved displacement efficiency, represented by the decrease in the residual oil saturation. The proposed model was implemented in a commercial simulator (STARS-CMG) in a two-dimensional geometry with two vertical wells (injector and producer). The oil production during alternate injection of water/emulsion/water process is studied with several flows condition with the purpose to analyze separately the effect of mobility control and improvement of the oil displacement in the process and finding the optimum operating conditions. The results obtained show that the oil-water emulsion injection can represent an important alternative in oil production as an enhanced oil recovery method.