Figure 11 | Scientific Reports

Figure 11

From: Evaluating physicochemical properties of crude oil as indicators of low-salinity–induced wettability alteration in carbonate minerals

Figure 11

Normalized flame ionization detector (FID) signal for the water-soluble organics content of oils in high- and low-salinity brines. (a) Organics content in 0.164 M NaCl brine after oil equilibration plotted versus the brine pH after brine/oil equilibration. The initial pH of the 0.164 M NaCl brine (pre-equilibrated with calcite powder) is 9.8. (b) Organics content in 5 M NaCl brine after oil equilibration plotted versus the brine pH after brine/oil equilibration. The initial pH of the 5 M NaCl brine (pre-equilibrated with calcite powder) is 9.1. (c) Comparison of the water-soluble organics content in 5 M NaCl brine and 0.164 M NaCl brine for all samples.

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