A process for mineral oil production, in which an aqueous injection fluid comprising at least a water soluble polyacrylamide-copolymer dissolved in the aqueous fluid is injected through at least one injection borehole into a mineral oil deposit, and crude oil is withdrawn from the deposit through at least one production borehole, wherein the process at least comprises the following steps: providing a liquid dispersion polymer composition at least comprising 20 % to 59.9 % by weight of an organic, hydrophobic liquid having a boiling point > 100°C, 40 % to 79.9 % by weight of particles of at least one water soluble polyacrylamide-copolymer having an average particle size of 0.4 μm to 5 μm dispersed in the organic liquid, wherein • the water-soluble polyacrylamide-copolymer comprises 50 to 90 % by weight of acrylamide units and 10 to 50 % by weight of acrylic acid units and/or their respective salts with respect to the total amount of all monomeric units in the copolymer, and • has a weight average molecular weight M w of from 5,000,000 g/mole to 30,000,000 g/mole, and 0.1 % to 10 % by weight of at least two surfactants, wherein the surfactants comprise • 0.05 to 5 % by weight of at least one surfactant capable of stabilizing water-in-oil-emulsions, and • 0.05 to 5 % by weight of at least one surfactant capable of stabilizing the dispersion, wherein the water contents of the liquid dispersion polymer composition is less than 10 % by weight and wherein the proportions of each of the components of the liquid dispersion polymer composition is based on the total amount of all components thereof, adding at least one activating surfactant to the liquid dispersion polymer composition, mixing the liquid dispersion polymer composition comprising at least one activating surfactant with an aqueous fluid, thus obtaining an aqueous injection fluid comprising at least one polyacrylamide-copolymer dissolved therein wherein the concentration of the polyacrylamide-copolymer in the injection fluid is from 0.05 % by weight to 0.5 % by weight based on the total amount of all components of the injection fluid, and injecting the aqueous injection fluid thus obtained into the mineral oil deposit. providing a liquid dispersion polymer composition at least comprising 20 % to 59.9 % by weight of an organic, hydrophobic liquid having a boiling point > 100°C, 40 % to 79.9 % by weight of particles of at least one water soluble polyacrylamide-copolymer having an average particle size of 0.4 μm to 5 μm dispersed in the organic liquid, wherein • the water-soluble polyacrylamide-copolymer comprises 50 to 90 % by weight of acrylamide units and 10 to 50 % by weight of acrylic acid units and/or their respective salts with respect to the total amount of all monomeric units in the copolymer, and • has a weight average molecular weight M w of from 5,000,000 g/mole to 30,000,000 g/mole, and 0.1 % to 10 % by weight of at least two surfactants, wherein the surfactants comprise • 0.05 to 5 % by weight of at least one surfactant capable of stabilizing water-in-oil-emulsions, and • 0.05 to 5 % by weight of at least one surfactant capable of stabilizing the dispersion, wherein the water contents of the liquid dispersion polymer composition is less than 10 % by weight and wherein the proportions of each of the components of the liquid dispersion polymer composition is based on the total amount of all components thereof, 20 % to 59.9 % by weight of an organic, hydrophobic liquid having a boiling point > 100°C, 40 % to 79.9 % by weight of particles of at least one water soluble polyacrylamide-copolymer having an average particle size of 0.4 μm to 5 μm dispersed in the organic liquid, wherein • the water-soluble polyacrylamide-copolymer comprises 50 to 90 % by weight of acrylamide units and 10 to 50 % by weight of acrylic acid units and/or their respective salts with respect to the total amount of all monomeric units in the copolymer, and • has a weight average molecular weight M w of from 5,000,000 g/mole to 30,000,000 g/mole, and • the water-soluble polyacrylamide-copolymer comprises 50 to 90 % by weight of acrylamide units and 10 to 50 % by weight of acrylic acid units and/or their respective salts with respect to the total amount of all monomeric units in the copolymer, and • has a weight average molecular weight M w of from 5,000,000 g/mole to 30,000,000 g/mole, and 0.1 % to 10 % by weight of at least two surfactants, wherein the surfactants comprise • 0.05 to 5 % by weight of at least one surfactant capable of stabilizing water-in-oil-emulsions, and • 0.05 to 5 % by weight of at least one surfactant capable of stabilizing the dispersion, • 0.05 to 5 % by weight of at least one surfactant capable of stabilizing water-in-oil-emulsions, and • 0.05 to 5 % by weight of at least one surfactant capable of stabilizing the dispersion, adding at least one activating surfactant to the liquid dispersion polymer composition, mixing the liquid dispersion polymer composition comprising at least one activating surfactant with an aqueous fluid, thus obtaining an aqueous injection fluid comprising at least one polyacrylamide-copolymer dissolved therein wherein the concentration of the polyacrylamide-copolymer in the injection fluid is from 0.05 % by weight to 0.5 % by weight based on the total amount of all components of the injection fluid, and injecting the aqueous injection fluid thus obtained into the mineral oil deposit.