Compressibility Factor: A dimensionless quantity that indicates the deviation of a real gas from ideal gas behaviour under specific conditions of pressure and temperature.

For natural gas, the compressibility factor value at base conditions is nearly 1, such as 0.99, so that B has to be negative (Fig. 1). Click here to enlarge image Equation 2 shows the second ...

Two separate correlations for predicting the isothermal compressibility of reservoir fluids and crude oils have been developed. One correlation is based on molecular weight; the other, on API ...

Ideal gases. Real Gases: Real gases. Compressibility Factor. Van der Waals Equation. Condensation of gases. Principle of Corresponding States. Math Interlude: Partial Differentiation. Thermodynamics: ...