The Application of Design Technique of Underground Gas Storage in Dazhang- tuo Condensate Gas Reservoir

On the basis of the principle of "injection production and storage" in underground gas storage, the underground gas storage must have the ability in high production in a short period, standing sudden and re-peatable change under low pressure and running in a very long term. The six major techniques involved in the design of underground gas storage are introduced. With these techniques, Dazhangtuo underground gas storage, with running program of a working gas volume of 6×10⁸ m³ and a daily peak shaving volume of 500×10⁴ m³, is successfully designed. During the first injection-production running circle in 2001, the gas storage reached all of the designed targets.