INTRODUCTION - Petroleum Reservoir Fluid Property Correlations - page 3

samples with worldwide origins. The results of these evaluations are
presented in tabular form. The best-in-class correlation equations that
are recommended are reproduced in the text.
Each data set then was sorted and sliced into subsets to determine
if the better of the correlation equations were valid throughout the
full range of field conditions and fluid properties that might occur.
The results are presented graphically. This procedure was followed for
nearly all of the fluid properties that were studied. In some cases, the
evaluation of the AREs and AAREs of these subsets served to determine
the best-in-class correlation equations.
The evaluations of these subsets were not meant to imply that one set
of correlation equations should be used over part of the range of values
of an independent variable and that another set of correlation equations
should be used over the remainder of values of that independent variable.
These evaluations were made to ensure that the correlation equations
selected as best-in-class are valid across the full range of the data.
Comments
Please note that each chapter has its own nomenclature section with
units for each variable specified. The units for each chapter may be
different. For instance, chapter 2 uses T for temperature with units of
ºR; chapter 3 uses T for temperature with units of ºF; and chapter 4 uses
T for temperature with units of ºC, unless otherwise noted.
Nomenclature
n Number of measurements
y calculated Value of a fluid property calculated with correlation equation
y measured Value of a fluid property measured in laboratory