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. 2021 Feb 24;6(9):6064–6069. doi: 10.1021/acsomega.0c05750

Figure 1.

Figure 1

(a) Generation of O/W emulsions by snap-off at the pore throat during low IFT surfactant flooding [Reprinted with permission from ref (12). Copyright 2020 Elsevier]. (b) Residual oil becomes extremely flexible and can be elongated during ultralow IFT surfactant flooding [Reprinted with permission from ref (15). Copyright 2017 American Chemical Society]. (c) Significant increase of apparent contact angle during ultralow IFT surfactant flooding in water-wet micromodels [Reprinted with permission from ref (18). Copyright 2020 Society of Petroleum Engineers]. (d) Formation of W/O emulsions during ultralow IFT surfactant flooding due to the significant increase in dynamic contact angle [Reprinted with permission from ref (19). Copyright 2012 Elsevier].