Question

At what pressure the viscosity of oil is minimum and why

Answer 1

Viscosity of crude oil varies with pressure, temperature, and the quantity of dissolved gas in the solution. Oil viscosityincreases with a decrease in pressure at saturated condition due to release of dissolved gas below the bubble point. When pressure is above the bubble point, viscosity increases with an increase in pressure because of compression of the liquid. Minimum viscosity will occur at the saturation pressure.