The threshold pressure gradient of low permeability sandstone was studied experimentally by measuring the pressure attenuation in an unsteady seepage flow.

为了研究低渗透砂岩的启动压力梯度，设计了一种非稳态渗流中测量压力的试验方法。

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A pressure drop model in horizontal well was established on the basis of the analytical solution of an elastic and unsteady seepage flow model in infinite reservoir.

本文在无限大均质地层弹性不稳定渗流模型解析解的基础上，建立了与地层耦合的水平井筒压降模型。

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A boundary fitted coordinate Finite Analytical Method (FAM) is described for the numerical solution of steady and unsteady seepage flow with pressure in foundation of sluice and DAMS.

本文给出了一种求解闸坝地基恒定与非恒定有压渗流的边界拟合坐标有限分析方法。

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