Patent ID: 8783356

Claim:
A process for the development, exploitation, and completion of subterranean mineral oil deposits and natural gas deposits comprising utilizing a water-soluble, hydrophobically associating copolymer comprising at least (a) 0.1 to 12% by weight of at least one monoethylenically unsaturated, hydrophobically associating monomer (a), and (b) 70% to 99.5% by weight of at least one monoethylenically unsaturated hydrophilic monomer (b) different therefrom, wherein the quantitative data are based in each case on the total amount of all of the monomers in the copolymer, wherein at least one of the monomers (a) is a monomer of the general formula (I) H 2 C═C(R 1 )—R 4 —O—(—CH 2 —CH(R 2 )—O—) k —(—CH 2 —CH(R 3 )—O—) l —R 5 (I) wherein the units —(—CH 2 —CH(R 2 )—O—) k and —(—CH 2 —CH(R 3 )—O—) l are arranged in block structure in the order shown in formula (I) and the radicals and indices have the following meaning: k: a number from 10 to 150, l: a number from 5 to 25, R 1 : H or methyl, R 2 : independently of one another, H, methyl, or ethyl, with the proviso that at least 50 mol % of the radicals R 2 are H, R 3 : independently of one another, a hydrocarbon radical having at least 2 carbon atoms or an ether group of the general formula —CH 2 —O—R 2′ , wherein R 2′ is a hydrocarbon radical having at least 2 carbon atoms, R 4 : a single bond or a divalent linking group selected from the group consisting of: —(C n H 2n )—, —O—(C n′ H 2n′ ), and —C(O)—O—(C n″ H 2n″ ), wherein n, n′, and n″ is in each case a natural number from 1 to 6, and R 5 : H or a hydrocarbon radical having 1 to 30 carbon atoms, wherein said water-soluble, hydrophobically associating copolymer is a copolymer (A1) which comprises at least two different hydrophilic monomers (b), and these are at least one neutral hydrophilic monomer (b1), and at least one hydrophilic anionic monomer (b2) which comprises at least one acid group selected from the group consisting of —COOH, —SO 3 H, —PO 3 H 2 , and salts thereof.