Evolution of Coal Permeability during Gas Injection—From Initial to Ultimate Equilibrium

The evolution of coal permeability is vitally important for the effective extraction of coal seam gas. A broad variety of permeability models have been developed under the assumption of local equilibrium, i.e., that the fracture pressure is in equilibrium with the matrix pressure. These models have...

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Bibliographic Details
Main Authors: Xingxing Liu, Jinchang Sheng, Jishan Liu, Yunjin Hu
Format: Article
Language:English
Published: MDPI AG 2018-10-01
Series:Energies
Subjects:
Online Access:http://www.mdpi.com/1996-1073/11/10/2800