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在致密飞藏中，由于吸附水膜的影响、岩石孔隙道喉道狭窄、连通性差、渗透率极低，加之气液固相间表面吸附力的作用等原因，在低渗油藏、气藏中均存在妄动压力梯度问题，即流体在多孔介质中的流动不再符合达西定律，而是遵从低速非达西渗流规律，四川石油管理局勘探开发研究院的开发研究院的室内实验已证明了这一点。在等温、单相、层流及忽略气体９骨脱效益的的条件下，气体低速达西渗流与液体低速非达西渗汉无因次渗流无因次渗流方

IN LOW-VELOCITY NON-DARCY PERCO-LATION FLOW THE UNITY OF WELL TEST A NALYSIS EQUATIONS USED FOR GAS AND OIL WELLS RESPECTIVELY

In tight reservoirs,owing to the reasons for the influence of adsorbed water films,narrow pore throats,bad connectivity,extremely low permeability and the effect of surface adsorptive forces among gas,liquid and solid,etc.,the problem with starting pressure gradient is always found in low permeability oil and gas reservoirs,i.e.the flow of fluids in porous media is no longer accordant with Darcy's low and follows low velocity non Darcy percolation flow law,which has been proved by the laboratory test in the Geological Exploration and Development Research Institute of SPA.Under the conditions of isothermal,single phase,laminar flow and neglecting gas slippage effect the dimensionless percolation flow equation of expressing gas low velocity non Darcy percolation flow is fully the same as that of expressing liquid low velocity non Darcy percolation flow,however the methods of gas well testing include pressure method,square pressure method and pseudopressure method,etc.,and the definitions of their dimensionless pressures and dimensionless starting pressure gradients are different from each other,which makes well test interpretation very inconvenient.On the basis of introducing the concepts of the pseudo volume factor and pseudo actual starting pressure gradient,the unity of well test analysis equations used for the low velocity non Darcy flow in gas and oil wells respectively is realized for the first time by the authors,so as to be convenient to do the research and teaching of the low velocity non Darcy flow well test analysis theory and to greatly simplify the design of well test analysis software.