VISCOSITY MODELLING OF AMERICAN CRUDE OIL FRACTIONS

The applicability of a recently proposed viscosity-temperature correlation for conventional crude oil, based on a single viscosity measurement, is extended to new data on light crude oil fractions. The correlation yielded predictions with an overall average absolute deviation of 0.86% from experimental values for 32 data sets consisting of 2 67 individual measurements.

For the lighter fractions, with viscosity below 3 cSt at 30°C, the correlation is shown to be capable of predicting the viscosity with an average absolute deviation of less than 1%. The prediction was based on a single viscosity point at 37.78°C (100°F) estimated by curve-fit method for each data set.