A successful case of proppant fracturing on an ultra-high pressure (Pressure gradient 0.018MPa/m), deep (5725-5783m) sandstone gas reservoir in Western China is described in this paper. Several technologies including high density(density1.12g/cm3) frac-fluid, high density(density 1.25g/cm3) flush-fluid, proppant slug, multi-step slurry injection schedule, real time analysis were used. 20-40 mesh 28.5m3 proppant was injected into the payzone successfully. The result is encouraging. The production reach to 307,000m3/d after the treatment. The project is a technical and economical success. The lessons acquired in the well will be a reference for the following similar wells.

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