The image above represents the well bore storage factor.

To compute for the well bore storage factor, two essential parameters are needed and these parameters are **Well Annulus Cross-Sectional Area (A _{o}) and Fluid Density (ρ).**

The formula for calculating the well bore storage factor:

C = ^{144Ao} / _{5.615ρ}

Where;

C = Well Bore Storage Factor

A_{o} = Well Annulus Cross-Sectional Area

ρ = Fluid Density

Let’s solve an example;

Find the well bore storage factor when the well annulus cross-sectional area is 54 and fluid density is 42.

This implies that;

A_{o} = Well Annulus Cross-Sectional Area = 54

ρ = Fluid Density = 42

C = ^{144Ao} / _{5.615ρ}

C = ^{144 x 54} / _{5.615 x 42}

C = ^{7776}/_{235.83 }

C = 32.97

Therefore, the **well bore storage factor **is **32.97.**

**Calculating the Well Annulus Cross-Sectional Area when the Well bore Storage Factor and the Fluid Density is Given.**

A_{o} = ^{C x 5.615ρ} / _{144}

Where;

A_{o} = Well Annulus Cross-Sectional Area

C = Well Bore Storage Factor

ρ = Fluid Density

Let’s solve an example;

Find the well annulus cross-sectional area when the well bore storage factor is 34 and fluid density is 24.

This implies that;

C = Well Bore Storage Factor = 34

ρ = Fluid Density = 24

A_{o} = ^{C x 5.615ρ} / _{144}

A_{o} = ^{34 x 5.615 x 24} / _{144}

A_{o} = ^{4581.84} / _{144}

A_{o} = 31.81

Therefore, the **well annulus cross-sectional area **is **31.81.**

**Calculating the Fluid Density when the Well bore Storage Factor and the Well Annulus Cross-sectional Area is Given.**

ρ = ^{144Ao} / _{C x 5.615}

Where;

ρ = Fluid Density

A_{o} = Well Annulus Cross-Sectional Area

C = Well Bore Storage Factor

Let’s solve an example;

Find the fluid density when the well bore storage factor is 16 and well annulus cross-sectional area is 20.

This implies that;

A_{o} = Well Annulus Cross-Sectional Area = 16

C = Well Bore Storage Factor = 20

ρ = ^{144Ao} / _{C x 5.615}

ρ = ^{2304} / _{112.3}

ρ = 20.51

Therefore, the **fluid density **is **20.51.**

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the well bore storage factor.

To get the answer and workings of the well bore storage factor 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 **Well Testing**** **under **Petroleum**

Now, Click on **Well Bore Storage Factor**** **under **Well Testing**

The screenshot below displays the page or activity to enter your values, to get the answer for the well bore storage factor according to the respective parameters which are the **Well Annulus Cross-Sectional Area (A _{o}) and Fluid Density (ρ).**

Now, enter the values appropriately and accordingly for the parameters as required by the **Well Annulus Cross-Sectional Area (A _{o})** is

**54**

**and Fluid Density (ρ)**is

**42**.

Finally, Click on Calculate

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