Heavy oil, extra heavy oil and Bitumen are natural resources with high-molecular weight and complex molecules. Proper measurement of critical properties is too difficult to measure and some times impossible. Thermodynamic description of such complex mixtures is greatly dependent on estimation and empirical correlations. I am looking for the best recommended procedures and protocols, as well as the suggested correlation for fluid characterization of heavy oil, extra heavy oil and bitumen.
Please refer to following book to estimate such heavy products:
1) PVT and Phase Behavior of Petroleum Reservoir Fluids
Ali Danesh
2) Characterization and Properties of Petroleum Fractions
M.R. Riazi
As you stated above, properties estimation of these heavy products always has some time huge deviation from reality. An alternative procedure is to refer to experimental procedures by ASTM for example to estimate some transport and thermodynamic properties:
Volume 05.01 to 05.06 and 06.01 to 06.04
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