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Surfactant and polymer are used to improve oil recovery. The micro-emulsion phase composition, viscosity and interfacial tension vary with salinity and injection concentration of chemicals. The viscosity contrast which is very large for heavy oil reservoirs, results in various types of viscous instabilities. There is no comprehensive field-scale modelling on the viscous fingering affecting the oil...
Polymer flooding is employed to prevent immiscible viscous fingering between oil and water. If the polymer injection concentration is decreased rapidly, there is a high chance that fast growing miscible viscous fingers will pierce through the polymer bank and enter the oil bank. This is very detrimental to oil production. We performed numerical modeling of polymer flooding in one-quarter of a five-spot...
Miscible and immiscible viscous fingering in porous media are undesirable for many engineering applications such as chemical enhanced oil recovery, contaminant transport, and liquid chromatography. For chemical enhanced oil recovery, polymer is injected to prevent immiscible viscous fingering between aqueous and oil phases. Polymer solution weakens the growth of immiscible viscous fingers but it may...
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