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

Figure 9

The oil recovery, water cut, and injection pressure versus pore volume: (a)1#—polymer flooding; (b)2#—polymer and D1 combination flooding; and (c)3#—polymer and A1 combination flooding.

(a)

(b)

(c)