Micellar flooding process

摘要

A process for the recovery of petroleum from a subterranean formation by the injection of a micellar displacement system consisting of a micellar solution and aqueous phase including the ammonium or alkali metal salt of an aminopolycarboxylic acid as a chelating agent. The chelating agent is present in concentrations in excess of the stoichiometric amount required to chelate the multivalent ion of the aqueous phase.