The role of coal seam properties on coupled processes during CO 2 sequestration: A parametric study

Mohsen S. Masoudian, David W. Airey and Abbas El‐Zein

Greenhouse Gases: Science and Technology, 2016, vol. 6, issue 4, 492-518

Abstract: 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.

Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:wly:greenh:v:6:y:2016:i:4:p:492-518

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