﻿ 应力敏感页岩气藏压力动态分析

# 应力敏感页岩气藏压力动态分析Pressure Dynamic Analysis of Stress-Sensitive Shale Gas Reservoir

Abstract: Based on the theory of Langmuir isothermal adsorption, the mathematical model of double media seepage in fractured shale gas reservoirs which considers stress sensitivity under different boundary conditions is established in this paper. Taking the strong nonlinearity of the model into account, desorption effect can be considered as the increase of isothermal compressibility of matrix during the resolution to decrease the degree of nonlinearity of the model. The analytical solution of the mathematical model in Laplace space is obtained by means of Laplace transformation and perturbation transformation. Finally, pressure transient curves are drawn with the aid of computer programs, and its characteristics have been analyzed, and parameter sensitivity analysis for the contributing factors affecting the dynamic curve of pressure also has been done. The results can provide scientific basis for well test analysis of shale gas reservoirs.

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