Cubic EOS calculates heavy oil SARA fractions

A new cubic equation of state (EOS) predicts densities of Western Canadian heavy oils and their SARA (saturates, aromatics, resins, and asphaltenes) fractions. The method considers the SARA fraction of heavy oil as a pseudocomponent.A comparison to experimental density data shows that the new EOS is more accurate than the Peng-Robinson (PR) EOS and Soave-Redlich-Kwong (SRK) EOS.The new EOS is a simple and accurate correlation for modeling and simulating oil and gas processes.SARA correlationsThe industry has several correlations for estimating phase behavior of asphaltene and their SARA fractions in heavy oils.1 2 Also, some have used cubic equations of state to predict molar volume of he...

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