Gas Expansion Factor

Gas expansion factor, abbreviated as \( E_g \), is the change in volume or pressure of a gas as it expands.  It is particularly relevant when dealing with compressible fluids, where changes in pressure and temperature significantly affect the volume of the gas.

Here are Some Gas Expansion Factor Applications

Pipeline Flow  -  Determining the flow rate and pressure drop of gases in pipelines.
Turbomachinery  -  Analyzing the performance of compressors and turbines.
Safety Valves  -  Designing and sizing relief valves to handle expanding gases.
Chemical Processes  -  Understanding the behavior of gases in reactors and separators.

 

Gas Expansion Factor Formula
\( E_g \;=\;  E_{gi} -   \dfrac{ 1 }{ 43560 \cdot A \cdot h \cdot n \cdot  ( 1 - w_{is} )  }  \cdot G_p \)
Symbol	English	Metric
\( E_g \) = Gas Expansion Factor	\(ft^3 \;/\; bbl\)	-
\( E_{gi} \) = Initial Gas Expansion Factor	\(ft^3 \;/\; bbl\)	-
\( A \) = Drainage Area	\(ft^2\)	-
\( h \) = Thickness	\(ft\)	-
\( n \) = Porosity	\(dimensionless\)	-
\( w_{is} \) = Initial Water Saturation	\(dimensionless\)	-
\( G_p \) = Gas Produced	\(ft^3\)	-