method to increase the erdoelertrages by about a wasserloeslichkeitsgradienten verfuegende mizelloesung of oberflaechenaktiven substances

摘要

The invention relates to a process for recovery of the oil assisted in the tanks of oil having a capacity of the exchange of ions and / p & & p & is injected into an injection well a stopper of the following forms a plurality of successive zones, characterizes in that the solubility in water for injection of the anionic surfactant - the active that it contains is adjusted in order to increase, in order to compensate for the interaction roche - micellar solution, of a zone of the plug has the following if it was the order of introduction of the various zones of the plug. / p & & p & a recovery assisted the oil.