Improved viscosity correlation for CO2/reservoir oil systems
This paper presents a correlation for predicting viscosities of single phase and equilibrium vapor (dense fluid) and liquid phases of CO2/synthetic oil and CO2/reservoir oil mixtures from experimental data obtained by the authors over the past couple of years. The viscosity, density, and composition database was obtained using a newly developed, oscillating quartz crystal viscometer which is described in the text. This new viscometer was developed to measure viscosities over a range of conditions from 90°F to 250°F and 1000 psi to 5000 psi. The experimental error in viscosity measurement was determined to be less than 5% over a range from 0.04 cp to 4.0 cp.