Abstract: The present invention relates to methods for recovering hydrocarbons from subterranean formations. One such example embodiment injects a polymer solution into an upper layer of a subterranean formation and, likewise, injects an aqueous solution into a lower layer of the subterranean formation. Hydrocarbons displaced by at least one of the injected polymer and the injected aqueous solution are collected.

Abstract: The present invention relates to a method for recovering hydrocarbons from a subterranean formation (1) comprising at least one upper layer (2) and at least one lower layer (3), the permeability of the upper layer being higher than the permeability of the lower layer; the method comprising the steps of injecting a polymer solution (4), containing a polymer, into the upper layer; injecting an aqueous solution (5) into the lower layer, the aqueous solution having a lower salinity than the polymer solution; and collecting hydrocarbons displaced by the injected polymer solution and/or the injected aqueous solution.