A Comparative Study on Fracture Characteristics of the Red Sandstone under Water and Nitrogen Gas Fracturing

<table class="table-group" id="tab10"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Specimen number</td><td class="align_center">Method</td><td class="align_center">Seepage rate (mm/s)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">W1′</td><td class="align_center">Numerical modeling</td><td class="align_center">0.1877</td></tr><tr><td class="align_left">W2′</td><td class="align_center">Numerical modeling</td><td class="align_center">0.0596</td></tr><tr><td class="align_left">W3′</td><td class="align_center">Numerical modeling</td><td class="align_center">0.0169</td></tr><tr><td class="align_left">G1′</td><td class="align_center">Numerical modeling</td><td class="align_center">3.8462</td></tr><tr><td class="align_left">G2′</td><td class="align_center">Numerical modeling</td><td class="align_center">0.9921</td></tr><tr><td class="align_left">G3′</td><td class="align_center">Numerical modeling</td><td class="align_center">0.2427</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Results of the seepage rate (II).</div>

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Table 10

Table 10: A Comparative Study on Fracture Characteristics of the Red Sandstone under Water and Nitrogen Gas Fracturing 