Geoscience Reference
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Stock-Tank Oil Gravity, °API
Ng-Egbogah
Beggs-Robinson
Dindoruk-Christman
Hanafy et al.
Petrosky-Farshad
Fig. 3-33. Average relative errors and average absolute relative errors of subsets of the data
described in table 3-24 sorted on stock-tank oil gravity show the quality of selected correlation
equations for estimating reservoir oil viscosities for pressures equal to and less than bubblepoint
pressure across the full range of this independent variable.
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