Fig. 5

Micromodel images of foam flow behavior with surfactant preflush at two different salinity levels (images "a to e" at 35,000 ppm salinity, images "f to j" at 5,000 ppm salinity) at different time intervals.

Micromodel images of foam flow behavior with surfactant preflush at two different salinity levels (images "a to e" at 35,000 ppm salinity, images "f to j" at 5,000 ppm salinity) at different time intervals.