METHOD FOR CO2-FLOODING USING ALK(EN)YL POLYGLUCOSIDES

摘要

The invention relates to a method for extracting crude oil by means of CO2-flooding, in which a liquid or supercritical CO2 and at least one alk(en)yl polyglucoside is injected through at least one injection bore into an oil reservoir and crude oil is extracted from the oil reservoir by means of at least one production bore. The alk(en)yl polyglucoside is preferably dissolved in the CO2phase. The invention also relates to a method for extracting crude oil by means of CO2-flooding in which mixtures of alk(en)yl polyglucosides are used with alk(en)yl polyalkoxylates anionic surfactants.