ISSN: 1758-1907

Diabetes Management

Oil Viscosity Reduction

Dissolving CO2 in oil greatly decreases the viscosity of the oil. The average reduction in viscosity depends on the initial viscosity, where higher viscous crudes show greater reduction. Reducing the oil viscosity increases the relative oil permeability and reduces the depletion of residual oil. Lefebvre du Prey has shown that decreasing oil viscosity increases the relative permeability of the oil at the end stage, But has no effect on the relative ratio of permeability. The permeability of the oil in CO2 injection is higher than that of N2 injection. Interfacial tension and reduction of viscosity, and oil swelling are mechanisms that are responsible for improving the relative permeability of oil. This allows the CO2 injection recovery factor to become higher than injection with N2.

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