Corrected Gas Gravity -- Vasquez & Beggs

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Ps
psia
Gamma_g
air=1
Ts
deg F
Gamma_API
API
Gamma_gc
air=1
V&B's correlation.
Gamma_gc = Gamma_g*(1 + 5.912*10**(-5)*Gamma_API*Ts*log(ps/114.7))
Where
Gamma_gc = Corrected gas gravity,
ps = separator pressure, psia
Gamma_g = gas gravity (air=1.0),
Ts = Separator temperature, F, and
Gamma_API = stock-tank oil gravity, API.

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