The image above represents the total oil pore volume.

To compute for the total oil pore volume, four essential parameters are needed and these parameters are **initial oil FVF (B _{oi}), initial water saturation (S_{wi}), oil in place (N) and gas cap ratio (m).**

The formula for calculating the total oil pore volume:

(PV)_{o} = ^{NBoi(1 + m)} / _{1 + Swi}

Where;

(PV)_{o} = Total Oil Pore Volume

B_{oi} = Initial Oil FVF

S_{wi} = Initial Water Saturation

N = Oil in Place

m = Gas Cap Ratio

Let’s solve an example;

Find the total oil pore volume when the initial oil FVF is 9, the initial water saturation is 11, the oil in place is 21 and the gas cap ratio is 18.

This implies that;

B_{oi} = Initial Oil FVF = 9

S_{wi} = Initial Water Saturation = 11

N = Oil in Place = 21

m = Gas Cap Ratio = 18

(PV)_{o} = ^{NBoi(1 + m)} / _{1 + Swi}

(PV)_{o} = ^{21 x 9(1 + 18)} / _{1 + 11}

(PV)_{o} = ^{3591} / _{-10}

(PV)_{o} = -359.1

Therefore, the **total oil pore volume** is **-359.1**

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the total oil pore volume.

To get the answer and workings of the total oil pore volume 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 **total oil pore volume**** **under **Reservoir Fluid Flow**

The screenshot below displays the page or activity to enter your value, to get the answer for the total oil pore volume according to the respective parameter which are the **initial oil FVF (B _{oi}), initial water saturation (S_{wi}), oil in place (N) and gas cap ratio (m).**

Now, enter the value appropriately and accordingly for the parameter as required by the **initial oil FVF (B _{oi})** is

**9**,

**initial water saturation (S**is

_{wi})**11**,

**oil in place (N)**is

**21**

**and gas cap ratio (m)**is

**18**.

Finally, Click on Calculate

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