Density of crude oil saturated with CO/sub 2/

A correlation for determining the density of CO/sub 2//crude-oil mixtures with engineering accuracy was developed. The correlation is based on the ideal-solution principle. Apparent liquid densities for CO/sub 2/ were correlated as a function of pseudoliquid system density and CO/sub 2/ concentration. In the final working correlation, the pseudoliquid system density is expressed as a function of psuedoliquid hydrocarbon density and CO/sub 2/ concentration. The psuedodensities are then corrected to reservoir conditions. The correlation is presented in both graphic and equation form and is easily adaptable to computer or hand-held calculator applications. The mean error for the 154 data points used to develop the correlation is + 1.39%, the average absolute error is 4.46%, and the standard deviation is 5.25%. An error analysis of the experimental data indicated that when the 20 points with the greatest deviation are removed, the mean error is +0.06%, the average absolute error is 2.8%, and the standard deviation is 2.44%. The correlation presented provides a simple method for calculating the density of CO/sub 2//crude-oil mixtures with engineering accuracy. The densities are used for calculating FVF and swelling and in other reservoir engineering calculations.