The image above represents the gas FVF.

To compute for the gas FVF, three essential parameters are needed and these parameters are **Z-Factor (Z), Temperature (T) and Pressure (P)**.

The formula for calculating the gas FVF:

B_{g} = 0.00504[^{ZT} / _{P}]

Where;

B_{g} = Gas FVF

Z = Z-Factor

T = (°R) Temperature

P = Pressure

Let’s solve an example;

Find the Gas FVF when the Z-Factor is 12, temperature is 30 and the pressure is 120.

This implies that;

Z = Z-Factor = 12

T = (°R) Temperature = 30

P = Pressure = 120

B_{g} = 0.00504[^{ZT} / _{P}]

B_{g} = 0.00504[^{12 x 30} / _{120}]

B_{g} = 0.00504[^{360} / _{120}]

B_{g} = 0.00504[3]

B_{g} = 0.01512

Therefore, the **gas FVF **is **0.01512 ^{bbl} / _{scf}.**

**Calculating for the Z-Factor when the Gas FVF, Temperature and Pressure is Given.**

Z = ^{Bg.P} / _{0.00504T}

Where;

Z = Z-Factor

B_{g} = Gas FVF

T = (°R) Temperature

P = Pressure

Let’s solve an example;

Find the Z-Factor when the Gas FVF is 22, temperature is 16 and the pressure is 80.

This implies that;

B_{g} = Gas FVF = 22

T = (°R) Temperature = 16

P = Pressure = 80

Z = ^{Bg.P} / _{0.00504T}

Z = ^{22 x 80} / _{0.00504 x 16}

Z = ^{1760} / _{0.08064}

Z = 21825.39

Therefore, the **Z-Factor **is **21825.39.**

**Calculating for the Temperature when the Gas FVF, Z-Factor and the Pressure is Given.**

T = ^{Bg.P} / _{0.00504Z}

Where;

T = (°R) Temperature

Z = Z-Factor

B_{g} = Gas FVF

P = Pressure

Let’s solve an example;

Find the Temperature when the Gas FVF is 44, Z-Factor is 29 and the pressure is 70.

This implies that;

Z = Z-Factor = 29

B_{g} = Gas FVF = 44

P = Pressure = 70

T = ^{Bg.P} / _{0.00504Z}

T = ^{44 x 70} / _{0.00504 x 29}

T = ^{3080} / _{0.14616}

T = 21072.79

Therefore, the **temperature **is **21072.79.**

**Calculating for the pressure when the Gas FVF, Z-Factor and the Temperature is Given.**

P = ^{0.00504 (ZT)} / _{Bg}

Where;

P = Pressure

B_{g} = Gas FVF

T = (°R) Temperature

Z = Z-Factor

Let’s solve an example;

Find the pressure when the Gas FVF is 52, Z-Factor is 32 and the Temperature is 90.

This implies that;

B_{g} = Gas FVF = 52

T = (°R) Temperature = 90

Z = Z-Factor = 32

P = ^{0.00504 (ZT)} / _{Bg}

P = ^{0.00504 (32 x 90)} / _{52}

P = ^{0.00504 (2880)} / _{52}

P = ^{14.5152} / _{52}

P = 0.279

Therefore, the **pressure **is **0.279.**

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the gas FVF.

To get the answer and workings of the gas FVF 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 **Fluid Properties**** **under **Petroleum**

Now, Click on **Gas FVF **under **Fluid Properties**

The screenshot below displays the page or activity to enter your values, to get the answer for the gas FVF according to the respective parameters which are the **Z-Factor (Z), Temperature (T) and Pressure (P).**

Now, enter the values appropriately and accordingly for the parameters as required by the **Z-Factor (Z)** is **12**,** Temperature (T)** is **30**** and Pressure (P)** is **120**.

Finally, Click on Calculate

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