| 摘要 |
Process for petroleum recovery, in which an aqueous formulation comprising at least one water-soluble, hydrophobically associating copolymer (A) and at least one non-ionic and/or anionic surfactant (B) is injected through at least one injection borehole into a petroleum reservoir and crude oil is taken from the reservoir through at least one production borehole, wherein the water-soluble, hydrophobically associating copolymer comprises at least acrylamide or derivatives thereof, a monomer having anionic groups and also a monomer which can bring about association of the copolymer, and also an aqueous formulation suitable for carrying out the process.
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