Abstract: Based on the data of the logging and thesting of the 6-exploratory wells drilled in the F1 fault block,this paper has verified the series of top-structure-map of Sandstone made in the reservoirdescription. Some new knowledge have been achieved:(1) The original 6 seismic horizons marked by reservoir and their polarities basically coincide with the drilling data.(2) The distance between the spots of the velocity spectrum is too large to control the lalend variety of interval velocity, and cause the shape of the structure inconsistent with the facts.