| abstract |
The invention relates to a method for tertiary oil recovery from underground deposits having a deposit temperature of = 70 ° C, wherein a copolymer comprising (meth) acrylamide or derivatives thereof, monoethylenically unsaturated carboxylic acids, is used, in particular acrylic acid, and an associative monomer, wherein the amount of associative monomer is from 0.1% to 0.9% by weight. A water-soluble copolymer comprising (meth) acrylamide or derivatives thereof, monoethylenically unsaturated carboxylic acids, in particular acrylic acid and 0.1% to 0.9% by weight of an associative monomer. |