The Viscosity Experiment Mensuration and Model Simulation of the CO<sub>2</sub>-Oil System

Through experiments and model simulation, this paper had a comprehensive study on the viscosity reduction of oil by CO 2 . The result indicates that the reduction of viscosity by CO 2 is an important factor on improving the oil recovery. For different oil samples of a certain reservoir, the curves of the relative viscosity with CO 2 concentration can be regressed to get a single curve, which can be used to estimate the viscosity of any unknown oil-CO 2 mixture in the reservoir. Relatived to the existing models of viscosity, the advanced LBC2 model has better precision, especially for high temperature condition.