The image above represents a gas recovery factor (G).

To compute for a gas recovery factor (production), two essential parameters are needed and these parameters are **cumulative gas production (G _{P}) and initial gas in place (G).**

The formula for calculating the gas recovery factor (G):

RF_{G} = ^{Gp} / _{G}

Where:

RF_{G} = Gas Recovery Factor (G)

G_{P} = Cumulative Gas Production

G = Initial Gas in Place

Let’s solve an example;

Find the gas recovery factor (G) when the cumulative gas production is 13 and the initial gas in place is 17.

This implies that;

G_{P} = Cumulative Gas Production = 13

G = Initial Gas in Place = 17

RF_{G} = ^{Gp} / _{G}

RF_{G} = ^{13} / _{17}

RF_{G} = 0.764

Therefore, the **gas recovery factor (G) **is **0.764.**

**Calculating the Cumulative Gas Production when the Gas Recovery Factor (G) and the Initial Gas in Place is Given.**

G_{P} = RF_{G} x G

Where;

G_{P} = Cumulative Gas Production

RF_{G} = Gas Recovery Factor (G)

G = Initial Gas in Place

Let’s solve an example;

Find the cumulative gas production when the gas recovery factor (G) is 24 and the initial gas in place is 6.

This implies that;

RF_{G} = Gas Recovery Factor (G) = 24

G = Initial Gas in Place = 6

G_{P} = RF_{G} x G

G_{P} = 24 x 6

G_{P} = 144

Therefore, the **cumulative gas production **is **144.**