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中文摘要：
考虑含水层型地下储气库水平尺寸远大于垂向尺寸的特点，建立含水层型地下储气库天然气运移的等效渗流模型。所建模型通过垂向积分并沿储层垂向高度平均将复杂的含水层型地下储气库三维渗流问题简化为二维平面问题。利用所建模型计算中国某拟建封闭含水层型地下储气库注气后储层含气饱和度和储层压力的变化，对比所建模型与传统三维渗流数学模型的计算精度，研究储层渗透率、储层厚度、注气速率、排水量和储层倾角等参数对天然气运移规律的影响。结果表明：等效渗流模型具有较高的计算精度，可以满足工程计算要求，同时具有所需参数少、计算速度快和数值模拟易实现等优点；储层压力随着储层渗透率、储层厚度和储层倾角的增加先减小后增大，随着注气速率的增加而非线性增加，随着排水量的增加而非线性减小，其中储层渗透率、储层厚度和储层倾角是含水层型天然气地下储气库选址过程中主要应考虑的因素。
英文摘要：
According to the characteristics that the horizontal size is much larger than the vertical size for underground gas storage reservoir in aquifer, an equivalent seepage model was established by the vertical integral average for the natural gas migration in the underground gas storage reservoir in aquifer. The three-dimensional seepage problem of complex type underground gas storage reservoir can be simplified to the plane problem taking integral average along reservoir depth. The numerical simulation of under- ground gas storage reservoir in aquifer was carried out based on the equivalent seepage model. The variarions of gas saturation and pressure of the reservoir by gas injection were studied. The results were compared with the three-dimensional seepage model to veri- fy the precision of the proposed model. The influences of reservoir permeability, reservoir thickness, injection rate, dip angle and displacement on saturation and reservoir pressure were studied. The examples show the equivalent seepage model is precise and correct, and can meet the actual engineering demands, which includes less parameters, higher calculation speed and facility of nu- merical simulation. The reservoir pressure decreases first and then increases with permeability, reservoir thickness and dip angle increasing. The reservoir pressure increases non-linearly with the increase of injection rate, but decreases non-linearly with the in- crease of water displacement. And, the permeability, reservoir thickness and dip angle are the key factors which should be consid- ered in the design of the selecting location of underground gas storage reservoir in aquifer.
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