Abstract: The reservoir characteristics of Dixi 18 well block in Kelameili gas reservoir has been analyzed in this paper.Through the Carboniferous gas reservoir fracturing difficulties analysis,the prepad slug technology in has been discussed,which improves the preflush percentage,adopts greater flow rate,fracturing technology with alteration discharge capacity,increases sand fluid ratio with small step,and so on.At the same time,the fracturing fluid system for low permeability tight sand gas accumulation has been developed and provided successful experience for the same gas well fracturing accumulation.