The geogas prospecting technique is a new method for finding concealed deposits by means of collecting and analysing trace-elements in ascending gas from underground. The experimental results of employing this method based on INAA at the Shuangliu-Chengdu-Deyang concealed fault zone are presented. Geogas anomalies are found almost on the top of the fault and the element combination may be some trace elements and petrogenic elements