Insights into Enhanced Oil Recovery by Polymer-Viscosity Reducing Surfactant Combination Flooding in Conventional Heavy Oil Reservoir

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr class="thead"><td class="align_left">Ionic composition</td><td class="align_center">Na<sup>+</sup></td><td class="align_center">Ca<sup>2+</sup></td><td class="align_center">Mg<sup>2+</sup></td><td class="align_center">Cl<sup>-</sup></td><td class="align_center">HCO<sub>3</sub><sup>-</sup></td></tr><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td class="align_left">Concentration (mg·L<sup>-1</sup>)</td><td class="align_center">3667</td><td class="align_center">292</td><td class="align_center">65</td><td class="align_center">6056</td><td class="align_center">527</td></tr><tr class="table-tr"><td colspan="6"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>The ionic composition and concentration of formation brine.</div>

Geofluids

tab1

Table 1

Table 1: Insights into Enhanced Oil Recovery by Polymer-Viscosity Reducing Surfactant Combination Flooding in Conventional Heavy Oil Reservoir 