METHOD FOR OIL RECOVERY USING HYDROPHOBICALLY ASSOCIATING POLYMERS

摘要

The invention relates to a method for oil recovery, according to which an aqueous formulation comprising at least one water-soluble, hydrophobically associating copolymer is forced through at least one injection well into an oil deposit and crude oil is extracted from the oil deposit through at least one production well. The water-soluble, hydrophobically associating copolymer comprises at least acryl amide or derivatives thereof, a monomer having anionic groups and a monomer that can cause the association of the copolymer. The invention also relates to a water-soluble, hydrophobically associating copolymer with low shear degradation that is suitable for carrying out said method.