​In this paper we present a simple model of steam foam transport and apply it to the Shell Kern River Bishop pilot. The only adjustable parameter in the model is an effective surfactant partition coefficient parameter in the model is an effective surfactant partition coefficient that accounts for surfactant losses and inefficiencies of foam generation, and determines foam propagation rate. Once this partition coefficient is calibrated to match observed foam growth in the pilots, the simulator correctly predicts an incremental 5.5 percent OOIP recovery due to steam foam and additional 3 percent OOIP due to infill wells.