Calculate Natural Gas Compressibility Factor (Z) using Gas Composition Value

This time.. i have to do some analysis to see how much is the impact of natural gas composition towards Compressibility Factor (Z value)..

You see.. not every company can invest on Gas Chromatography (GC).. (expensive to own and maintain)..

So.. in our plant.. the natural gas is only corrected to actual Pressure and Temperature.. the Z-correction cannot be done due to unavailability of GC machine..

So i found this free software which is very coool.

You key-in gas compo - and it will calculate for you the Z-Value..