Abstract: Through numerical simulation method, the adaptability of the double horizontal well Steam Assisted Gravity Drainage (SAGD) to the reservoir and liquid parameters has been investi-gated. At the same time, the adaptability limits of SAGD to the oil viscosity, the reservoir horizontal permeability, and ratio of
vertical permeability to horizontal permeability and the depth of oil layers have been presented. The plates of the relationship be-tween cumulative oil steam ratio and the average oil production rate's varying with the above factors, the rational formulas of the co-infections by the above parameters and the three dimensional curl planes have been obtained. The exploitation effect and the
adaptability of the similar reservoir can be analyzed and forecas-ted by these plates and formulas. The analyzing and forecasting results can provide the scientific foundations for developing the similar oil field with the Steam Assisted Gravity Drainage.