Process for restoring the permeability of a subterranean formation

摘要

A process for restoring the injectivity of a well penetrating and in fluid communication with a subterranean formation wherein an aqueous treating solution comprising a mixture of an aqueous solution having no more than 30 weight percent of hydrogen peroxide dissolved therein and a mutual solvent is injected via the well to contact polymer accumulation so as to degrade and disperse same. The mutual solvent comprises alcohol, aromatic hydrocarbon, and an alkyl or alkylaryl polyoxyalkylene phosphate ester surfactant.