Geoscience Reference
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40
20
0
-20
-40
-60
-80
80
70
60
50
40
30
20
10
0.1
1
10
100
Measured Viscosity of Reservoir Oil, cp
Ng-Egbogah
Beggs-Robinson
Dindoruk-Christman
Hanafy et al.
Petrosky-Farshad
Fig. 3-38. Average relative errors and average absolute relative errors of subsets of the data
described in table 3-24 sorted on measured reservoir oil viscosity 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 dependent variable.
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