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

Figure 12

The remaining oil distribution at the end of water flooding and polymer-viscosity reducing surfactant combination flooding.

(a) Water flooding

(b) Polymer flooding

(c) Water flooding

(d) Polymer and D1 combination flooding

(e) Water flooding

(f) Polymer and A1 combination flooding