Permeability and volumetric changes in coal under different test environment

RIS ID

94969

Publication Details

Aziz, N., Ren, T., Nemcik, J. & Zhang, L. (2012). Permeability and volumetric changes in coal under different test environment. Colloquium on Geomechanics and Geophysics (pp. 45-47). Czech Republic: Academy of Sciences of the Czech Republic.

Abstract

Permeability refers to the ability of coal to transmit gas when a pressure or concentration gradient exists across it. Permeability is considered by many researchers to have a significant impact on a coal seam's ability to produce gas). Permeability is closely related to the coal fabric (i.e. cleat spacing and aperture width) and varies significantly as fluid pressure changes during coal seam gas production. Permeability has a strong effect on the gas production profile and gas well performance and is dependent upon various factors, which include effective stress, gas pressure, water content, disturbance associated with drilling and matrix swelling/shrinkage due to adsorption/desorption.

Link to publisher version (URL)

Colloquium on Geomechanics and Geophysics

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