A New Method for Research on Unsteady Pressure Dynamics and Productivity of Ultralow-Permeability Reservoirs

<table class="table-group" id="tab6"><tr><td><table class="table"><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Case</td><td class="align_center" rowspan="2">Well name</td><td class="align_center">Test horizon</td><td class="align_center">Logging permeability</td><td class="align_center">Well-test permeability</td><td class="align_center">Explain skin</td></tr><tr class="thead"><td class="align_center">Oil group</td><td class="align_center">mD</td><td class="align_center">mD</td><td class="align_center">—</td></tr><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td class="align_left">Conventional method</td><td class="align_center">XJX-2Sa</td><td class="align_center">WC</td><td class="align_center">4.5</td><td class="align_center">1.1</td><td class="align_center">-1.01</td></tr><tr><td class="align_left">Methods in this paper</td><td class="align_center">XJX-2Sa</td><td class="align_center">WC</td><td class="align_center">4.5</td><td class="align_center">5.33</td><td class="align_center">5.5</td></tr><tr class="table-tr"><td colspan="6"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Comparison table for result interpretation of different wells in the XJX-2Sa well.</div>

Geofluids

tab6

Table 6

Table 6: A New Method for Research on Unsteady Pressure Dynamics and Productivity of Ultralow-Permeability Reservoirs 