Experimental Study on Enhanced Oil Recovery by Nitrogen-Water Alternative Injection in Reservoir with Natural Fractures

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Factors</td><td class="align_center">Gas-water slug ratio</td><td class="align_center">Injection velocity (mL/min)</td><td class="align_center">Injection volume in one cycle (PV)</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">1</td><td class="align_center">0.5 : 1</td><td class="align_center">0.6</td><td class="align_center">0.5</td></tr><tr><td class="align_left">2</td><td class="align_center">1 : 1</td><td class="align_center">0.4</td><td class="align_center">1.0</td></tr><tr><td class="align_left">3</td><td class="align_center">2 : 1</td><td class="align_center">0.2</td><td class="align_center">2.0</td></tr><tr><td class="align_left">4</td><td class="align_center">4 : 1</td><td class="align_center">0.1</td><td class="align_center">5.0</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Orthogonal experimental scheme design table of alternating gas-water flooding.</div>

Geofluids

tab3

Table 3

Table 3: Experimental Study on Enhanced Oil Recovery by Nitrogen-Water Alternative Injection in Reservoir with Natural Fractures 