Experiment on methane displacement in coalbed by supercritical carbon dioxide

Authors

WU Di, School of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, China
LIU Xueying, School of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, China
SUN Keming, School of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, China
XIN Liwei, School of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, China
MIAO Feng, School of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, China

Abstract

Using self-made experimental system, experiments were performed on coal samples to study supercritical CO₂ seepage, adsorption and CH₄ displacement by supercritical CO₂. Experimental results show that permeability and adsorption of supercritical CO₂ in coal increase with CO₂ pressures. Pressures and temperatures of CO₂ influence the values of displaced CH₄. Values of displaced CH₄ increase by average 0.076 cm³/g and sweep efficiency rises by 17%-23% with the CO₂ pressure increasing from 8 MPa to 12 MPa, while displacement volume decreases linearly. With the temperature rising by 10℃, sweep efficiency increases by 8% while displacement volume declines by 0.5 on average.

Keywords

methane displaced by supercritical carbon dioxide, temperature, pressure of CO2, sweep efficiency, dis-placement volume

DOI

10.3969/j.issn.1001-1986.2019.03.014

Recommended Citation

WU Di, LIU Xueying, SUN Keming, et al. (2019) "Experiment on methane displacement in coalbed by supercritical carbon dioxide," Coal Geology & Exploration: Vol. 47: Iss. 3, Article 15.
DOI: 10.3969/j.issn.1001-1986.2019.03.014
Available at: https://cge.researchcommons.org/journal/vol47/iss3/15

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