10.6084/M9.FIGSHARE.13102903.V1
Akash Talapatra
Subasis Halder
Abed Inan Chowdhury
Enhancing coal bed methane recovery: using injection of nitrogen and carbon dioxide mixture
<p>Nitrogen (N<sub>2</sub>) and carbon dioxide (CO<sub>2</sub>) gases injection yield substantially various recovery ways. Here, a one-dimensional mathematical model is applied comprising of mass balances for explaining gas sorption and flow, and a geomechanical relationship to describe the permeability changes during gas injection. That’s why numerical simulations for investigating the performance of injecting flue gas mixture in enhanced coal bed methane (ECBM) recovery are represented. Significant intuitive features are found regarding the gas flow dynamics at the time of displacement and influences of sorption on ECBM operation. The study revealed that the injection of pure CO<sub>2</sub> causes much reduction in cleat permeability, but pure N<sub>2</sub> is injected to increase the permeability without any loss of injectivity. Therefore, pure CO<sub>2</sub> causes more efficient displacement in terms of total CH<sub>4</sub> recovery, while the addition of N<sub>2</sub> to the mixture assists to make quicker the initial methane recovery.</p>
Space Science
Physiology
39999 Chemical Sciences not elsewhere classified
Ecology
Immunology
Taylor & Francis
2020
2020-10-16
2021-02-01
Journal contribution
186378 Bytes
10.1080/10916466.2020.1831533
10.6084/m9.figshare.13102903
CC BY 4.0