盐穴储气库快速造腔方案

Accelerated mining method for salt-cavern gas storage

储气库作为天然气管网的配套设施,对于维持天然气供应平稳有重要作用。中国储气库建设近年来发展飞速,但由于其建设相对较晚,尚无法满足日益增加的天然气需求,冬季“气荒”现象时有发生。储气库建设投入大、周期长,一个储气库从造腔到投产约需要4年时间。在此提出一种快速造腔投产方案,即在造腔的同时注气,利用注入的天然气作为保护腔顶的阻溶剂。这种快速造腔方式不仅降低了阻溶剂的成本,同时还将腔体投产时间大大提前。模拟分析表明,边建边储的盐穴地下储气库造腔方式是可行的。

Underground gas storage,which serves as the auxiliary facility of the nature gas pipeline network,is very important to maintain the stability of gas supply.In recent years,the construction of underground gas storage develops rapidly in China.However,due to the late construction,the underground gas storage cannot satisfy the growing demand of nature gas,and gas shortage has happened occasionally in winter.In view of the large investment and long construction time required for gas storage construction,generally 4 years required from mining to put into service,an accelerated mining method is put forward herein.Definitely,it is to inject gas while mining and to take the injected gas as the protective blanket of the cavity roof.In this way,not only the cost of blanket material can be reduced,but also the construction time can be shortened significantly.As shown in the simulation analysis,it is feasible to store gas while the underground storage is constructed.(9 Figures,4 Tables,20 References)