The general formula and application for the elastic two-phase method with stable and variable rate of gas wells
For the gas flow controlled by the closed boun&dary,after the completion of gas testing and shut-in to obtain the origi-nal formation pressure,the pressure draw down curves can be divided into three stages:unsteady state,transit state and pseudo-steady state.The pseudo-steady state is called elastic two-phase state,and the pressure within the well control range of the elastic two-phase state decreases at a constant velocity.This article established the general formulas for the stable rate and variable rate elas-tic two-phase method of gas wells,based on the stable rate elastic two-phase method represented by pressure first power,pressure square and pseudo pressure proposed by Chen Yuanqian,and the variable rate elastic two-phase method represented by pressure first power proposed by Blasingame.The practical application shows that the general formula provided in this paper are practical and ef-fective.
gas wellstable ratevariable ratepseudo-pressurepressure one powerpressure squaredelastic two-phase method
万方数据
维普
