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本文建立了临界流量与地层渗透率、孔隙度和油气动力粘度之间的半理论关系式，给出了层流、湍流的判断准则及地层真表皮因子的计算式，并用三个实例进行了对比验证。
This paper establishes the semi-theoretical relationship between critical flow rate and formation permeability, porosity and dynamic viscosity of oil and gas. The criterion of laminar flow and turbulent flow and the calculation formula of real epidermal factor of formation are given. The three examples are compared verification.