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.**

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

G = ^{GP} / _{RFG}

Where;

G = Initial Gas in Place

RF_{G} = Gas Recovery Factor (G)

G_{P} = Cumulative Gas Production

Let’s solve an example;

Find the initial gas in place when the gas recovery factor (G) is 30 and the cumulative gas production is 60.

This implies that;

RF_{G} = Gas Recovery Factor (G) = 30

G_{P} = Cumulative Gas Production = 60

G = ^{GP} / _{RFG}

G = ^{60} / _{30}

G = 2

Therefore, the **initial gas in place **is **2.**

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the gas recovery factor (G).

To get the answer and workings of the gas recovery factor (G) using the **Nickzom Calculator – The Calculator Encyclopedia. **First, you need to obtain the app.

You can get this app via any of these means:

**Web** – https://www.nickzom.org/calculator-plus

To get access to the **professional **version via web, you need to **register** and **subscribe **for** NGN 1,500 **per** annum** to have utter access to all functionalities.

You can also try the **demo **version via https://www.nickzom.org/calculator

**Android (Paid)** – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator

**Android (Free)** – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator

**Apple (Paid)** – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8

Once, you have obtained the calculator encyclopedia app, proceed to the **Calculator Map, **then click on **Petroleum **under **Engineering**

Now, Click on **Reservoir Fluid Flow **under **Petroleum**

Now, Click on **gas recovery factor (G)**** **under **Reservoir Fluid Flow**

The screenshot below displays the page or activity to enter your value, to get the answer for the gas recovery factor (G) according to the respective parameter which are the **cumulative gas production (G _{P}) and initial gas in place (G).**

Now, enter the value appropriately and accordingly for the parameter as required by the **cumulative gas production (G _{P})** is

**13**and

**initial gas in place (G)**is

**17.**

Finally, Click on Calculate

As you can see from the screenshot above, **Nickzom Calculator**– The Calculator Encyclopedia solves for the gas recovery factor (G) and presents the formula, workings and steps too.