There are 10 wells were drilled to Jurassic system Shaximiao formation in the work area, there are 5 wells produce natural gas, the production from thousands  cubic meters to tens thousands cubic meters, The production of qx10 well is the highest, it produce 57.4×10+3 m+3 natural gas per day. In the work area, the Jurassic system Shaximiao gas reservoir is dominated by distributaries channel sand, mouth bar sand of river-lake delta depositional system and fracture. The lateral change of the reservoir is fast, distribution rule of the gas reservoir is complex in vertical and horizontal direction. The gas reservoir is dominated by lithology and tectonic action etc. It is a lithological gas reservoir base of structural setting. The research goal is clarify the sand body distribution regularity and its distribution area of gas-bearing formations and questionable gas-bearing formations, ascertain the thickness and area of every gas-bearing sand body, provide reliable parameter to calculation of reserves. In the course of research, first of all, use the method of natural gama well logging parameter inversion predict the thickness of sand, then utilizing neutron-acoustic well logging curve intersection to reconstruct the gas-bearing attribute curve predict the thickness of gas-bearing sand. The result indicate that utilize this method combine with other method to predict the thickness of gas-bearing sand have better effect. This is a new valuable method for research.