Effect of adsorbed polymer on two-phase flow and relative permeabilities

5 Effect of adsorbed polymer on two-phase flow and relative permeabilities 

Another issue that has only been addressed in a few studies is the effect that polymer adsorption has on the relative permeability of the aqueous and oleic phases that subsequently flood a core. In conventional polymer flooding, this is not a very important consideration since the process usually occurs in one particular saturation direction for example, if the formation is strongly water-wet then the oil displacement by water or polymer solution is an imbibition process. In such a case, the oil would not normally flow at a high saturation in a polymer-flooded zone, although such behaviour is conceivable (but unlikely) in certain polymer oil displacements in layered systems (see 

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