recovery of the Lower Oligocene formation in the White Tiger Field. The research comprised
steps ranging from optimizing the surfactant solution to coreflooding and piloting on two
injection wells. The concentrations of surfactants [alkyl ether sulfonate (AES) and sodium α-
olefin sulfonate (AOS)] and solvent (n-butanol) were optimized using response surface
methodology with the response value set equal to the interfacial tension (IFT). The certified …