Nanzhuang is one of the important areas for exploration and evaluation to Longdong Oilfield,which is located in the most promising area of oil producing in Ordos Basin. According to the microcosmic and macrovisual study on Chang 6 reservoir and the contrast to Baima area, it is considered that the properties of the reservoir are poor, and that it is good for the sedimentary microfacies porosity permeability of the distributary channel and mouthbar developed in the area which is proved to be a advantage ground for oil and gas accumulation.