Abstract:Considering the poor physicochemical property, its non-uniformity, and low permeability of mainly lithologic and stratigraphic pool of reservoir type in the southern depression of Wuliyasitai sag, the sedimentary reservoir is studied in this paper, using sequence stratigraphic methods and new technique of reservoir prediction. Many sandstone bodies of different periods and different types are identified, the range of the sandstone bodies is determined, and the reservoir position is predicted. In recent three years, ten wells were drilled with success.