Geoscience Reference
In-Depth Information
40
20
0
-20
-40
-60
-80
-100
90
80
70
60
50
40
30
20
10
0.1
1
10
100
Measured Viscosity of Reservoir Oil, cp
Petrosky-Farshad *
Hanafy et al.
Vasquez-Beggs *
Dindoruk-Christman *
Bergman-Sutton *
* used Beggs-Robinson equations to calculate oil viscosity at bubblepoint pressure
Fig. 3-44. Average relative errors and average absolute relative errors of subsets of the data
described in table 3-26 sorted on measured reservoir oil viscosity show the quality of selected
correlation equations for estimating reservoir oil viscosities for pressures greater than bubblepoint
pressure across the full range of this dependent variable.
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