Study on Viscosity Reducer Flooding Technology for Deep Low Permeability Extra Heavy Oil Reservoirs

Figure 5

The relationship between flow rate and pressure gradient: (a) represent core flooding with 145 mD and 150°C; (b) represent core flooding with 40 mD and 150°C; (c) represent core flooding with 145 mD and 76°C; (d) represent core flooding with 40 mD and 76°C.

(a)

(b)

(c)

(d)