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利用气体稳定渗流原理，建立了无限大气藏中水平井产能分析的数学模型，该数学模型具有压力平方形式和拟压力形式。在获得数学模型的解即水平气井的产能公式的基础上，通过定义水平井的产能指数，研究了气层厚度、各向异性、水平井在气藏中的位置及地层损害对产能的影响，从而为水平气井地质设计、钻井工程及气藏工程研究提供了较为科学的依据。分析结论：水平气井适合于对薄层气藏、垂直裂缝较大的气藏的开采；对于底水气藏最好使水平井位于中部以上的气层位置，以获得最高产能；应加强钻井和完井中的储层保护。
Based on the principle of steady gas seepage, a mathematical model for productivity analysis of horizontal wells in an infinite gas reservoir is established. The mathematical model has the form of pressure squared and pseudo-pressure. On the basis of obtaining the productivity formula of the solution-level gas wells of the mathematical model, the influence of formation thickness, anisotropy, location of horizontal wells in gas reservoirs and formation damage on productivity is studied by defining productivity index of horizontal wells. This provides a more scientific basis for the research on geological design, drilling engineering and gas reservoir engineering of horizontal gas wells. Analysis conclusion: The horizontal gas well is suitable for the exploitation of thin gas reservoirs and vertical fractures gas reservoirs; for the bottom water gas reservoirs, it is better to make the horizontal wells be located above the middle part of the gas layer to obtain the highest productivity; drilling and Reservoir protection in completion.