Geoscience Reference
In-Depth Information
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0
100
200
300
400
500
600
Temperature, °F
Phillips et al. (1980) m = 1
Mao-Duan (2009) m = 1
Phillips et al. (1980) m = 2
Mao-Duan (2009) m = 2
Phillips et al. (1980) m = 3
Mao-Duan (2009) m = 3
Phillips et al. (1980) m = 4
Mao-Duan (2009) m = 4
Phillips et al. (1980) m = 5
Mao-Duan (2009) m = 5
Phillips et al. (1980) m = 6
Mao-Duan (2009) m = 6
Fig. 4-25. Extrapolation of relative viscosity to high temperatures
Computing viscosity of oilfield brines
The following procedure is recommended for calculating the
viscosity of oilfield brines. The density of pure water is calculated using
the Spivey et al. correlation. The Mao-Duan correlation is then used to
calculate the viscosity of pure water, the relative viscosity of brine, and
the brine viscosity.
Step 1. Calculate the density of pure water, ρ w ( T , p ), using the Spivey et
al. correlation, equations (4.2)-(4.5).
Step 2. Calculate the viscosity of pure water using the Mao-Duan
correlation. First, calculate the natural logarithm of the water viscosity
using equation (4.41).
(4.41)
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