Shale Poroelastic Effects on Well Performance Analysis of Shale Gas Reservoirs

The effect of poroelastic properties the shale matrix on gas storage and transport mechanisms has gained significant attention, especially during history-matching hydrocarbon production forecasting in unconventional reservoirs. common oil industry practice reservoir simulation is extension conventional that ignores dynamic behavior porosity permeability as a function effective net stress. This approach impact characteristics production. highly relate to geomechanical properties, such Young’s Modulus, Poisson’s ratio, bulk modulus, sorption behavior, total organic content (TOC), mineralogy presence natural fractures multi-scale structure. In this study, order quantify poroelasticity production, multi-continuum was employed which divided into materials, inorganic materials fractures. governing equations for were developed from basic fundamentals mass momentum conservation equations. case, organics assumed be diffusive, while inorganics governed by convection. Finally, fracture system added matrix, investigated. A modified Palmer Mansoori model (1998) used include pore compression, swelling/shrinkage desorption-induced deformation matter overall compressibility matrix. For part relations between rock mechanical obtained. dual Langmuir–Henry isotherm also describe materials. coupled then solved using implicit finite difference MATLAB. purpose, fluid obtained actual well logging core analysis Marcellus well. results showed importance pressure response rate recovery found mainly due at an early stage. Coupling including reservoirs will significantly improve engineering completion design optimization providing more accurate robust forecasts each hydraulic