| 主权项 |
1. A method for recovering a hydrocarbon fluid from a subterranean formation, comprising:
introducing into the formation an aqueous flooding fluid, the fluid comprising water and a water-soluble polymer having hydrolyzable cross-linked monomer units, the polymer comprising about 1 mol % to about 100 mol % acrylamide monomers, wherein, after introducing the aqueous flooding fluid into the formation, the hydrolyzable cross-linked monomer units are hydrolyzed to produce an aqueous flooding fluid after hydrolysis having a viscosity that is about the same or higher than a viscosity of the aqueous fluid prior to injection. |
