A New Trinomial Deliverability Equation with Consideration of Stress Sensitivity
Received date: 2013-11-25
Revised date: 2014-01-26
Online published: 2014-05-10
Reservoirs with low permeability always exhibit strong stress-sensitivity.According to the regression of extensive experimental data,power function is suitable for describing the stress sensitivity of reservoir permeability.However,the related reported on productivity of reservoirs with low permeability using power function of permeability is rare.This paper established a novel productivity equation for abnormally high pressure and low permeability reservoirs with consideration of threshold pressure gradient,turbulent effect as well as stress-sensitivity using the power function equation.The inflow performance relationships (IPR) were also plotted under different combination of relevant parameters.These parameters have significant effects on the productivity of low permeability gas wells,which should be taken into account when we assess the deliverability of these reservoirs.
XIAO Xiang-jiao,BI Yan-peng,WANG Xiao-pei,GAO Jie,CHANG Zhi-qiang,ZHANG Jian-ye . A New Trinomial Deliverability Equation with Consideration of Stress Sensitivity[J]. Natural Gas Geoscience, 2014 , 25(5) : 767 -770 . DOI: 10.11764/j.issn.1672-1926.2014.05.767
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