1.2. Crude Oil Properties

1.2.1. Oil Density

Density is defined as the mass of a unit volume at a specified pressure and temperature. There are several theoretical and empirical expressions for estimating oil density. The predictive capability of theoretical approaches, such as the all cubic Equation of State (EOS), for liquid density is poor, so a correction must be applied. Also, it is needed to perform a tough calculation to find the density of liquid phases. Although empirical correlations are much easier to use, they are developed from experimental data points. Therefore the correlations are valid for limited ranges of pressure, temperature, and composition. Some theoretical and empirical correlations are provided in the following sections. ...

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