Research Article
A Synergy between Controlled Salinity Brine and Biosurfactant Flooding for Improved Oil Recovery: An Experimental Investigation Based on Zeta Potential and Interfacial Tension Measurements
Figure 7
Secondary CSB flooding on core C27, (a) cumulative oil recovery and differential pressure; (b) pH and conductivity of effluents; (c) Ca2+ and Mg2+ analyses of effluents. The straight lines indicate concentration of Ca2+ (coloured) and Mg2+ (black) in connate water saturation (—) and CSB injected (. . .).