Viscosity and thermal conductivity prediction for hydrocarbon systems

Accurate prediction of thermophysical properties of gascondensate systems is very important for optimum design and operation of most equipment involved in production, transportation, and processing of gas-condensate systems. The need for accurate prediction methods for these properties is inevitable because it is almost impossible to obtain thermophysical property data for every fluid that would be encountered. In addition, obtaining all of these properties via experimental procedures is not only time-consuming but also extremely expensive. Viscosity and thermal conductivity are such properties. In this study, a new technique using Enskog dense-gas theory coupled with an equation of state is developed to predict viscosity and thermal conductivity of gas-condensate systems. Ten different equations of state are used and extensive comparisons with experimental data are made over wide temperature and pressure ranges both for pure components and mixtures. The comparison with experimental data is good for both viscosity and thermal conductivity.