PROPERTIES OF OILFIELD BRINES - Petroleum Reservoir Fluid Property Correlations - page 149

Figure 4-11 shows the AARE in brine compressibility as a function
of pressure. Only the high-quality Gibson-Loeffler data set contains
brine compressibility data for pressures higher than 5,000 psia. Thus,
the AARE for pressures lower than 5,000 psia reflects lower quality data
rather than accuracy of the correlations.

100.0%

10.0%

1.0%

0.1%

0 5,000 10,000 15,000 20,000

Pressure, psia

Spivey et al. (modified)
Rowe-Chou (1970)

Rogers-Pitzer (1982)
Osif (1988)

Archer (1992)

Fig. 4-11. Average absolute relative error in brine compressibility as a function of pressure
for various correlations, based on the compressibility data subset of the brine density database
in table 4-1