PROPERTIES OF OILFIELD BRINES - Petroleum Reservoir Fluid Property Correlations - page 176

Table 4-13 shows the calculated AARE and ARE for the available
correlations. The Phillips et al. (1980) and the Mao-Duan (2009)
correlations for relative viscosity of brine were evaluated using both
the IAWPS-08 correlation equation for viscosity of pure water and the
Mao-Duan correlation equation for viscosity of pure water with the
modified Spivey et al. correlation equation for density of pure water.
In addition, the Mao-Duan relative viscosity correlation equation was
also evaluated using the Mao-Duan correlation equation for viscosity
of pure water with the IAPWS-IF97 correlation equation for density of
pure water.

Table 4-13. Results of evaluation of brine viscosity correlations against the brine viscosity
database in table 4-12
Correlation

ARE AARE

Mao-Duan (2009)* -0.10% 0.64%

Mao-Duan (2009) † -0.11% 0.64%

Mao-Duan (2009) ‡ -0.11% 0.64%

Phillips et al. (1980)* 0.06% 0.73%

Phillips et al. (1980) † 0.06% 0.79%

Kestin et al. (1978) 0.25% 0.81%

Kestin-Shankland (1984), correlation (a) 0.39% 0.82%

Spivey et al. (2004) 0.17% 0.83%

Kestin-Shankland (1984), correlation (b) 0.45% 0.88%

Phillips et al. (1978) -0.26% 1.75%

Meehan (1980) 2.50% 4.39%

† With pure water viscosity from Mao-Duan (2009), pure water density from modified Spivey

* With pure water viscosity from IAPWS-08

‡ With pure water viscosity from Mao-Duan (2009), pure water density from IAPWS-IF97

et al.

The performance of six of the correlations as functions of temperature,
pressure, and salinity is shown in figures 4-21 through 4-24.
The Mao-Duan relative viscosity correlation was evaluated using
the Mao-Duan water viscosity correlation with the modified Spivey et
al. correlation for density of pure water. Results using the IAWPS-08
correlation for pure water viscosity, as well as the Mao-Duan pure
water viscosity equation with the IAWPS-IF97 pure water density
equation gave almost identical results, and were omitted from the
graphical comparisons.
The Phillips et al. (1980) correlation was evaluated using the
Mao-Duan water viscosity correlation with the modified Spivey et
al. correlation for density of pure water. Results using the IAWPS-08
correlation for pure water viscosity were almost identical and were
omitted from the graphical comparisons.