THE OPERATION MODE FOR DAZHANGTUO UNDERGROUND GAS RESERVOIR
大张坨地下储气库运行模式分析

This article introduces the general outline of Dazhangtuo Underground Gas Reservoir (UGR) , summarizes and analyzes the mode of management and operation for this reservoir. From beginning of being putting into service at the end of 2000 till March of 2003, its sum total amount of gas injection is 0. 825 billion cubic meters, and of gas recovery is 0. 803 billion cubic meters. Its recent operation principle is as follows: I Absorption capacity of injection well is influenced by the effective permeability in the reservoir formation and average effective thickness; II On condition that injection pressure is able to resist the permeating from fluid, the fluid in low-pressure area in the gas reservoir (Banzhong) move slowly, thus UGR is expanded; III Its effective working gas amount is about 0. 5 billion cubic meters; IV As long as formation pressure is not below the minimum operation pressure of UGR, the production capacity of single well is up to 500-600 thousand cubic meters per day; V The interface between gas and water move outside along with pressure increase of UGR, and the gas reservoir have good flat connection; VI The effective working gas amount is little. At last, the article produces detailed operation methods how to make optimization of operation.