板814断块改建地下储气库的可行性

已建的大港地下储气库群为京津地区的发展发挥了巨大作用，但今后不断增长的天然气需求决定了寻找并建设新储气库的紧迫性。总结了地下储气库的优选标准，从油气藏的构造、断层及盖层的封闭性、储集层的物性与储气库容量估算、老井处理等方面，综合评价了大港板桥地区板814断块改建地下储气库的可行性；指出板814断块从地质、老井处理以及地面环境等方面适合建设地下储气库；根据储气库规划设计的原则，确定了板814断块改建地下储气库的规划设计方案，并得出结论：改建时只需新钻5口定向井（2口注采井，3口排水井），可充分利用板中北储气库的压缩机和地面管线资源，节约大量的投资。

FEASIBILITY STUDY ON RECONSTRUCTING BAN 814 FAULT BLOCK RESERVOIR INTO UNDERGROUND GAS STORAGE IN DAGANG BANQIAO AREA

Underground gas storage is a major tool for the seasonal gas peak shaving in city and gas supply safety when an accident takes place. The built up Dagang underground gas storage group plays a significant role in the development of Beijing and Tianjin area. The growing natural gas demand urges the industry to seek and construct new underground gas storage. Therefore, this paper summarized the optimized standards for underground gas storage and comprehensively appraised the construction based on the Ban 814 fault block in Dagang Banqiao area in terms of gas reservoir structure, sealing property of fault and cap formation, physical property of the reservoir and estimate on gas storage's volume and the treatment of oil wells. It demonstrated that the Ban 814 fault block can be applied to construct underground gas storage in terms of geology, old well treatment and surface environment, etc. The design proposal for the underground gas storage based on the Ban 814 fault block was decided in accordance with the planning and design rule of gas storage. It has been concluded that only five directional wells are needed to be drilled during reconstruction (two injection production wells and three relief wells); the compressor and surface pipeline resources of Banzhongbei gas storage can be fully used to save tremendous amount of investment.