Influence of Oil Viscosity on Alkaline Flooding for Enhanced Heavy Oil Recovery

Figure 8

Pictures of the fluid produced during the displacement tests of Xia-8 heavy oil with different viscosities. (Effluents during alkali injection and the extended water flooding were collected in the tubes from left to right in turn. The pictures show their appearances at the end of flooding, without demulsification.)

(a)  18235 mPa·s at 30°C

(b) 3950 mPa·s at 50°C

(c) 1083 mPa·s at 70°C