Figure 4
Flooding test and wettability alteration. (A) Water flooding and surfactant flooding test with microfluidics device. (B) A magnified image of microfluidics chip: the microfluidics chip has a pocket pattern with a 300 µm × 300 µm square and a 150 µm × 20 µm groove in the middle. (C) Contact angle measurement of hydrophobic surface before wettability alteration. (D) Contact angle measurement of surface after wettability alteration. (E) Original oil in place (OOIP) changes after water flooding followed by surfactant flooding. With water flooding OOIP reaches 69%, and with further nanoplate surfactant flooding, the OOIP percentage improves to 48%.
