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- Title
Mechanisms in CO<sub>2</sub>-enhanced coalbed methane recovery process.
- Authors
Asif, Mohammad; Lei Wang; Rui Wang; Heng Wang; Hazlett, Randy D.
- Abstract
Injection of CO2 and subsequent desorption of CH4 is considered to be the most efficient enhanced coalbed methane (ECBM) recovery technique to date. Meanwhile, CO2-ECBM is an excellent option for CO2 geo-sequestration for an extended period. Despite ongoing research efforts and several field applications of this technology, the mechanisms of the process have yet to be fully understood. The coalbed heterogeneity, the fluid interactions with coal, the CO2 induced swelling, and the continuous pressure and composition changes require outright insights for optimal application of the technique. Furthermore, intermolecular interactions of CO2 and CH4, their competitive adsorption on the dry/wet coal surface, and the dispersion and advection processes play an important role in defining the CO2-ECBM recovery process. An attempt has been made here to understand the key mechanisms of CO2-ECBM recovery in coalfields, particularly the adsorption of CO2 in the supercritical state at the recommended sequestration depth.
- Subjects
CARBON dioxide enhanced oil recovery; COALBED methane; DESORPTION; SUPERCRITICAL geothermal resources; INTERMOLECULAR interactions
- Publication
Advances in Geo-Energy Research, 2022, Vol 6, Issue 6, p531
- ISSN
2207-9963
- Publication type
Article
- DOI
10.46690/ager.2022.06.09