The image represents the total production time.

To compute for the total production time, two essential parameters are needed and these parameters are **Cumulative Production before Shut-In (N _{p}) and Stabilized Well Flow (Q_{o}).**

The formula for calculating the total production time:

t_{p} = ^{24Np} / _{Qo}

Where:

t_{p} = Total Production Time

N_{p} = Cumulative Production before Shut-In

Q_{o} = Stabilized Well Flow

Let’s solve an example;

Find the total production time when the cumulative production before Shut-In is 24 and the stabilized well flow is 43.

This implies that;

N_{p} = Cumulative Production before Shut-In = 24

Q_{o} = Stabilized Well Flow = 43

t_{p} = ^{24Np} / _{Qo}

t_{p} = ^{24 x 24} / _{43}

t_{p} = ^{576} / _{43}

t_{p} = 13.39

Therefore, the **total production time** is **13.39 hrs.**

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the total production time.

To get the answer and workings of the total production time 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 **Total Production Time**** **under **Well Testing**

The screenshot below displays the page or activity to enter your values, to get the answer for the total production time according to the respective parameters which are the **Cumulative Production before Shut-In (N _{p}) and Stabilized Well Flow (Q_{o}).**

Now, enter the values appropriately and accordingly for the parameters as required by the **Cumulative Production before Shut-In (N _{p})** is

**24**

**and Stabilized Well Flow (Q**is

_{o})**43**.

Finally, Click on Calculate

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