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The role of coal seam properties on coupled processes during CO 2 sequestration: A parametric study
Author(s) -
Masoudian Mohsen S.,
Airey David W.,
ElZein Abbas
Publication year - 2016
Publication title -
greenhouse gases: science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.45
H-Index - 32
ISSN - 2152-3878
DOI - 10.1002/ghg.1575
Subject(s) - permeability (electromagnetism) , poromechanics , coal mining , geology , coal , petroleum engineering , coalbed methane , porosity , parametric statistics , geotechnical engineering , porous medium , engineering , statistics , genetics , mathematics , membrane , biology , waste management
It has been proposed that a considerable amount of CO 2 can be safely sequestered from the atmosphere in geological formations such as coalbeds. In spite of promising evidence of the economic and technical viability of CO 2 sequestration in coal seams, many of its hydro‐geomechanical aspects are not fully understood. This paper presents a coupled hydro‐mechanical model that is used to assess the reservoir performance of a coalbed and the induced surface and subsurface deformations. A series of numerical simulations has been performed to study the effects of different parameters on the reservoir and geomechanical behaviors associated with CO 2 injection. A single‐phase dual‐porosity model is coupled to a one‐dimensional poroelastic model and an analytical model for the ground surface movements. Through these simulations, the role of three sets of parameters at different scales is investigated: fracture characteristics, matrix characteristics, and geomechanical/geometrical characteristics. The comparative impacts of these parameters on reservoir permeability, volume of the stored CO 2 , and deformations of the coalbed and the ground surface, are quantitatively assessed, in order to identify the most important parameters influencing the hydro‐mechanical response of the ground.