Method of operation of an underground medium containing an oil, in which it takes into account the basic species of the oil in the presence of a surfactant in order to optimize the use

摘要

Method of operation of an underground medium containing an oil, in which it takes into account the basic species of the oil in order to optimize the use. It selects an aqueous solution comprising at least one surfactant in order to inject it into the medium. Then, it determines the ph, phi, the aqueous solution, before contact with the oil, so that the ph, phf, the aqueous solution after contact with the oil belongs to a ph range desired, by taking into account both the acid species, and the basic oil, and the actions of the surfactant on the species to determine the evolution of the ph of the aqueous solution, after contact with the oil. Then, the aqueous solution having the phi determined. Finally, it is injected into the medium, the aqueous solution thus prepared.