Modeling the viscosity-temperature relationship of Nigerian Niger-Delta crude petroleum

The viscosity-temperature relationship of Nigerian Niger-Delta crude oils has been modelled using a generalized viscosity correlation developed by Puttagunta et al. (1992) for conventional crude oils. The correlation requires only one viscosity measurement for prediction, and the data fitting makes use of a simple algorithms. Predictions with the correlation yielded results that matched the experimental viscosities accurately. The correlation was modified by deriving new values of shape-factor and asymptotic limit. The difference in the results obtained with the original and modified correlation is well within the acceptable limits of experimental error; as both matched the experimental data very well with overall average absolute deviations of 2.4% and 2.3%, respectively.