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大张坨储气库是国内第一座大型地下储气库 ,于 2 0 0 0年 12月进入投产阶段 ,它的建成为北京的供气状况和大气环境治理做出了贡献。B876储气库则是大张坨储气库的扩建工程 ,位于B876区块板Ⅱ1枯竭式超低压凝析油气藏上 ,气藏埋深 2 2 2 0～ 2 2 4 0m ,原始地层压力 2 2 .5MPa,目前地层压力为 10 .5 9MPa ,地层压力系数 0 .4 76 ;在该废弃气藏上新钻了 5口储气库注采井 ,其中 3口井射孔完井后自喷 ,日产气量高达 12 .5× 10 4m3 。文章详细介绍了所钻注采井在钻井、固井、射孔完井等工序过程中采取的油气层保护技术和经验 ,对今后衰竭气藏的挖潜、枯竭式气藏储气库的建设具有参考价值。

Completion Technology of Drilling Gas Storage Injection-production Wells on a Depleted Gas Field

??Dazhangtuo gas storage is the first large sized underground gas storage in China and it was put into production in December 2000.Its being established has made a contribution to improving the gas supply conditions and bringing the atmospheric environment under control for Beijing.Ban 876 underground gas storage is an extension project of Dazhangtuo gas storage and it is located in Ban ??₁ depleted condensate reservoir with extra low formation pressure.The burial depths of the reservoir are 2 220??2 249 m and it is of 22.5MPa original formation pressure,10.59 MPa present formation pressure and 0.476 formation pressure coefficient.Field gas storage injection production wells were drilled,of which three were flowing wells after perforation with gas production rates of more than 125×10³m³/d.The experiences and techniques of gas reservoir protection adopted in the processess of the drilling,cementing,perforating and completing of these gas storage injection production wells are introduced in the paper in detail,which is of reference value to tapping the latent power of the depleted gas reservoir and to constructing the underground gas storages in the depleted gas reservoirs in the future.