Team, I need a favour please. I am trying to estimate the BOE...

Team,

I need a favour please. I am trying to estimate the BOE for SNE. But would like to understand an example of the FVF I should use for my formula's. I have scoured the web and cannot find any example range.
It would appear that we obviously have a very significant gas cap size wise, I am interested to try and predict its net pay in BOE.

Any suggestions please for FVF?

"For gas the Formation Volume Factor (FVF) is used, which is the inverse of the SF. Due to reduction in pressure at the Earth's surface, gas expands from 50 to 350 times its original volume, depending on depth and composition of the gas. Hence a gas expansion factor is used, changing the equation for estimating the possible recoverable cubic meters of hydrocarbons (gas) to: A x NP x P x RF x HS x FVF!"

The following is the table I have drafted, but I have used 1 as a placeholder for FVF as I can't find any precedence and or range;