The superheated steam has been applied in the industrial application, and the demand for the study on the production capacity is increased. Based on the studies of radius calculation, the hot zone and cold zone have been calculated separately. The cold oil flows from the supply boundary to the hot zone, and then flows through the hot zone to wellbore. The quasi steady state solution has been used to solve the problem. Using the model to calculate oil productivity for two cycles in KMK oil field, the relative error of cumulative water production is less than 0.5%.