VISCOELASTIC LIQUID WITH SURFACTANT ADDITIVES, HAVING IMPROVED SHEAR RESTORATION INDEX, RHEOLOGAL PROPERTIES AND STABILITY Russian patent published in 2010 - IPC C09K8/68 

FIELD: chemistry.

SUBSTANCE: viscoelastic liquid contains a surfactant selected from a group comprising an amphoteric surfactant, a zwitterionic surfactant, an anionic surfactant, a non-ionic surfactant, a cationic surfactant and combinations of the substances listed above and an agent which facilitates restoration in order to shorten restoration time during shear, where the said agent an ethylene glycol ethylether acrylate-based copolymer. The method of processing an underground layer involves feeding an aqueous liquid into a well, where the said liquid contains a viscoelastic surfactant and an agent which facilitates restoration during shear, which contains an ethylene glycol ethylether acrylate-based copolymer. The method of processing an oil deposit involves obtaining the viscoelastic liquid, addition of a rheological property enhancer and feeding said liquid into the well.

EFFECT: more efficient processing of oil and gas wells.

10 cl, 2 ex