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Investigation of Flow Behaviour of Gases in Coal Matrix Sample by Simulation Model in Comsol Multi-Physics


Lalit Sirvi , College of Technology and Engineering


COMSOL Multiphysics, coal matrix and fracture , numerical model, flow behavior


Carbon capture and storage (CCS) projects require an accurate evaluation of the sealing potential of faults and highly fractured zones to minimize the potential for CO2 leakage. A study on the control exerted by fracture and fault networks on fluid flow, and in particular on CO2 leakage, should be based upon a representation of discrete fracture networks (DFN) that is as close as possible to that observed in the field. Due to post-lithogenetic fracturing or weathering, coal matrix can contain complex dual porosity structure, which makes it difficult to identify the fluid flow behavior through it. Although CO2-enhanced coal bed methane (ECBM) recovery has been comprehensively investigated, the impact of coal matrix-fracture interactions on the evolution of coal permeability under in-situ conditions is still unclear. In this studies laminar flow models was developed to explicitly quantify the flow behavior of CO2 gas through dual solid media (coal matrix and fracture). A numerical simulation model was developed to simulate flow profiles and fluid flow in COMSOL Multiphysics. The COMSOL Multiphysics model closely predicts the gas flow through the porous coal matrix sample for the range of confining and gas injection pressures studied in low gas flow rates (laminar flow). COMSOL Multiphysics model uses Darcy’s law and Frick’s law for flow simulations. The graphical relations between velocities, pressure, shear stress etc. with Height and Width displacement was studied in this investigation.

Other Details

Paper ID: IJSRDV2I8038
Published in: Volume : 2, Issue : 8
Publication Date: 01/11/2014
Page(s): 96-102

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