Equations lead to asphaltene deposition predictions

An evaluation found that when tuned, the Soave-Redlich-Kwong (SRK) and Peng-Robinson (PR) equations of state (EOS) can predict heavy oil densities and SARA fractions with only a smaller error.One needs to know these values in order to predict the likelihood of asphaltene deposition.The evaluation tuned the SRK and PR equations of state with only one set of measured densities and then the equations were used for density predictions of four Western Canadian heavy oils and bitumens with no further fitting parameters. The calculations indicated that the tuned EOSs could be used to predict the densities of the SARA fractions of at least Western Canadian heavy oils and bitumens. Without volume ...

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