Improved Methods for the Determination of Viscosities of Dead, Saturated, and Under-Saturated Reservoir Oils (original) (raw)
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The knowledge of viscosity plays a very important role in a variety of interesting engineering problems involving fluid flow in porous media and reservoir simulation. The dead oil viscosity is defined as the viscosity of crude oil at atmospheric pressure (no gas in solution) and system temperature. Several correlations have been proposed in the past for predicting the dead oil viscosity. Most of the dead oil viscosity correlations are based on the oil °API gravity and temperature. In this work, evaluating the performance of investigated models. Beal, Beggs-Robinson, Glaso, Labedi and Petrosky and Farshad correlations have been investigated for some Libyan crude oils. Statistical analysis in terms of absolute deviation percent (% AD), and the absolute average deviations percent (% AAD) are used to subject the evaluation of the viscosity correlations. Comparison results indicate that, Beggs-Robinson correlation provide the best prediction for dead oil viscosities in the investigated L...