In the construction of aquifer underground gas storage, natural gas is substituted by inert gas as cushion gas in order to save the cost.
在含水层型地下储气库的建设中,为节省投资可以用惰性气体替换天然气作为垫层气。
The underground natural gas storage (UNGS) plays an important part in gas exploitation and utilization. The cost of cushion gas is an expensive investment for a new storage.