Comprehensively using well drilling, well log, logging, regional geological characteristics, all kinds of dynamic and quiescent data, we obtain the conclusions that the upper member of Guantao formation in Zhanhua depression developed not only fluvial facies but also lacustrine sand bodies. The early upper member of Guantao formation developed fluvial facies of braided and meandering streams, and the middle-late developed depositional systems of shore and shallow lacustrine and shallow delta-oxidizing and fluctuated shallow lake. The lacustrine depositional model expands the exploration area, and the lacustrine depositional theory, combining with production practice of oilfield, makes stratigraphic correlation more reliable. The beach bar, channel sand, and flat sand bodies are better exploration areas of Ng1+2 in Zhanhua depression.