Storage
of carbon
dioxide in coal seams can reduce the effect of
carbon dioxide on human lives and enhance the production of methane.
The phase of carbon dioxide changes into the supercritical state in
deep coal seams. This study reports two experiments at different conditions.
In the first experiment, the permeability of supercritical carbon
dioxide in briquettes is recorded, and in the second experiment, experiments
of displacing methane by supercritical carbon dioxide are performed
to better understand the displacement of methane by carbon dioxide.
The experimental results show the exponential relation between the
permeability and volume stresses. The amount of methane displaced
by supercritical carbon dioxide is recorded with respect to volume
stresses and temperatures. Sweep efficiency and displaced volume are
used to estimate the production of methane.
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