Cyclic Injection to Enhance Hydraulic Fracturing Efficiency: Insights from Laboratory Experiments

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Parameter</td><td class="align_center">Conventional injection</td><td class="align_center">Cyclic injection</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Averaged breakdown pressure (MPa)</td><td class="align_center">27.15</td><td class="align_center">25.20</td></tr><tr><td class="align_left">Standard deviation of the breakdown pressure (MPa)</td><td class="align_center">7.38</td><td class="align_center">0.81</td></tr><tr><td class="align_left">Averaged uniaxial compressive strength (MPa) (all 6 specimens)</td><td class="align_center" colspan="2">48.43</td></tr><tr><td class="align_left">Averaged Brazilian tensile strength (MPa) (all 6 specimens)</td><td class="align_center" colspan="2">2.23</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Some average results for the second batch of sandstone.</div>

Geofluids

tab4

Table 4

Table 4: Cyclic Injection to Enhance Hydraulic Fracturing Efficiency: Insights from Laboratory Experiments 