Effect of ethylene oxide groups on calcite wettability reversal by nonionic Surfactants: An experimental and molecular dynamics simulation investigation

Ethoxylated nonionic surfactants are promising candidates for enhanced oil recovery (EOR) from oil-wet carbonate reservoirs due to their ability to reverse the mineral wettability. The wettability-reversal efficiency increases with the number of the ethoxy (EO) groups in the surfactant molecule.