Transient pressure of percolation through one dimension porous media with threshold pressure gradient

This paper studies the transient pressure of percolation during one product ion and one shutting in one dimension porous media with threshold pressure gradient, the differential equations are derived and solved with numerical computation. Basing on numerical solution, it is analyzed that: 1. the rela tion between the steady pressure at well bore (or at endpoint) and threshol d pressure gradient, shut-in time, and the corresponding formulae are deriv ed; 2, the regulation of transient pressure peak. The result is very useful and will help experiments and applications in the development of low perme ability reservoirs with threshold pressure gradient.