Abstract: A process of recovering oil from an oil-bearing formation which process comprises injecting into the formation an aqueous enhanced oil recovery formulation comprising water and an enhanced oil recovery additive, which process comprises supplying water via a first conduit to a flow control valve, combining water which has passed the flow control device with an additive solution containing at least 3000 ppm of the enhanced oil recovery additive to obtain the aqueous enhanced oil recovery formulation, injecting the aqueous enhanced oil recovery formulation into the formation via a first well, producing from the formation via a second well a mixture and separating oil from the mixture produced.

Abstract: Process for enhanced oil recovery which process comprises (a) combining expandable polymer with water having a total dissolved solids content of from 1,000 to 20,000 ppm to obtain an aqueous polymer mixture, (b) injecting the aqueous polymer mixture into an oil-containing formation, and (c) recovering oil from the oil containing formation.