Laboratory Study of the Displacement Coalbed CH<sub>4</sub> Process and Efficiency of CO<sub>2</sub> and N<sub>2</sub> Injection

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr class="thead"><td align="left">Number</td><td align="center">Stress/MPa</td><td align="center">Injectant gas</td><td align="center">Injection pressure/MPa</td><td align="center">Displaced volume</td><td align="center">Sweep efficiency/%</td></tr><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td align="left">Test 7</td><td align="center">14</td><td align="center">CO<sub>2</sub></td><td align="center">1.5</td><td align="center">1.4</td><td align="center">97.82</td></tr><tr><td align="left">Test 4</td><td align="center">19</td><td align="center">CO<sub>2</sub></td><td align="center">1.5</td><td align="center">2.4</td><td align="center">94.44</td></tr><tr class="table-tr"><td colspan="6"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Displacement experiment conditions and results under different stress conditions.

The Scientific World Journal

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Table 3

Table 3: Laboratory Study of the Displacement Coalbed CH<sub>4</sub> Process and Efficiency of CO<sub>2</sub> and N<sub>2</sub> Injection 

The Scientific World Journal

Laboratory Study of the Displacement Coalbed CH4 Process and Efficiency of CO2 and N2 Injection

Table 3

Laboratory Study of the Displacement Coalbed CH₄ Process and Efficiency of CO₂ and N₂ Injection