Wet Gas: 2005 #48 (similar)

Equations for wet gas are found on 13 RES 9.

Q1) Given API or SG of oil, what is the molecular weight?

A1) Given API, MW = 5954/(API - 8.8).

Q2) Given the GOR and SG of gas and oil, along with the Mol wgt (say 50,000 scf/STB, 0.7, 0.83, and 197), what is the SG of the fluid mix back in the reservoir?

Q3) What is the "Gaseous Equivalent" of a stock-tank liquid?
A3) 133,300(SG_oil / MW_oil)

The numbers for Q2 above are easy to play with. If your GOR was 15,000, SG 0.67 & 0.76, and a standard mol wgt, you calculate a SG of the reservoir wet gas in the mid 0.8's. This sort of problem is easy if you check your units. And don't panic when seeing terms like condensate, wet gas, etc.