To verify the core-flood experiments results, a contact angle test was performed on the substrate cut from the cores before and after flooding. Each core was tested with the desired brine. All the cores were in neutral wettability conditions before flooding (see Fig. ). After foam-brine flooding was completed, other substrates cut were taken from the flooded cores, and contact angle tests were performed again. The results revealed that as the salinity decreases, the resulting contact angle decreased as well. For core B31, the contact angle was 118° before flooding the core with three cycles of foam and SW. After flooding, the contact angle dropped to 79°. Foam flooding leads to a decrease in the core wettability towards being near water-wet. For core B35, the contact angle was 111° before flooding, while after flooding, it was 74°. The contact angle decreased from 101° to 57° (water-wet) in core B45.