Diliverability equation for stress-sensitive gas reservoir

Abstract

Aiming at the problem of permeability change in exploiting stress-sensitive gas reservoir, the new pseudopressure considering stress sensitivity is defined when the deliverability is analyzed, binomial deliverability equation considering stress-sensitive gas reservoir is set up based on the theory of gas flow through porous media mechanics, and the computation of the equation parameters discussed, at last, case study is carried out, the influence of reservoir stress sensitivity on stress-sensitive gas reservoir deliverability evaluation is discussed. Research indicates that the value of the forecasted gas well open flow potential considering gas reservoir permeability stress sensitivity is lower than the forecasted one when permeability is constent, the error from forecasting is related to the degree of reservoir stress sensitivity, the research is practically meaningful to understand deliverability evaluation of stress-sensitive gas reservoir and development dynamic forecasting.