【摘要】 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。针对惰性气体与天然气的混合问题,建立了气水两相渗流模型及气体扩散模型,并以此为基础建立了二维平面有限元模型。采用半离散方法对数学模型进行了有限元方程的推导,并应用所建立的模型进行了含水层型地下储气库以惰性气体作为部分垫层气的建库过程和工业运行的模拟。更多还原

【Abstract】 In the construction of aquifer underground gas storage, natural gas is substituted by inert gas as cushion gas in order to save the cost. Models of gas-water two-phase seepage and gas diffusion are established due to the mixing either inert gas or natural gas. On the basis of the models, the 2D finite -element model is developed. The finite-element equation is derived for mathematical models by the semi-discrete method. For the aquifer underground gas storage, taking inert gas as partial cushion gas, the construction and commercial operation are simulated by means of the established models.更多还原