| Presence of several reservoir lithologies with different capillary properties Fluid contacts at facies changes Oil-water and gas-water contacts affected; gas-oil contact not affected Hydrocarbon and water production may be intercalated | | Presence of several reservoir lithologies with different capillary properties Fluid contacts at facies changes Oil-water and gas-water contacts affected; gas-oil contact not affected Hydrocarbon and water production may be intercalated |