The image above represents the linear flow rate.

To compute for the linear flow rate, four parameters are needed and these parameters are **I****nitial pressure (P _{1}), Final Pressure (P_{2}), Thickness (h) **and

**Permeability (k).**

The formula for calculating linear flow rate:

q = 0.001127kh[P_{1} – P_{2}]

Where:

q = Linear Flow Rate

P_{1} = Initial Pressure

P_{2} = Final Pressure

h = Thickness

k = Permeability

Let’s solve an example;

Find the linear flow rate when the initial pressure is 12, final pressure is 22, thickness is 18 and permeability is 44.

This implies that;

P_{1} = Initial Pressure = 12

P_{2} = Final Pressure = 22

h = Thickness = 18

k = Permeability = 44

q = 0.001127kh [P_{1} – P_{2}]

q = 0.001127 x 44 x 18 [12 – 22]

q = 0.001127 x 44 x 18 [-10]

q = 0.892584 [-10]

q = -8.92584

Therefore, the **linear flow rate** is **-8.92584** ^{bbl}/_{day}.

**Calculating Permeability when the linear flow rate, Initial Pressure, Final Pressure and Thickness is Given.**

k = ^{q} / _{0.001127h (p1 – p2)}

Where;

k = Permeability

q = Linear Flow Rate

P_{1} = Initial Pressure

P_{2} = Final Pressure

h = Thickness

Let’s solve an example;

Find the permeability when the initial pressure is 34, final pressure is 24, thickness is 12 and linear flow rate is 50.

This implies that;

q = Linear Flow Rate = 50

P_{1} = Initial Pressure = 34

P_{2} = Final Pressure = 24

h = Thickness = 12

k = ^{q} / _{0.001127h (p1 – p2)}

k = ^{50} / _{0.001127h (34 – 24)}

k = ^{50} / _{0.001127h (10)}

k = ^{50} / _{0.01127}

k = 4436.5

Therefore, the **permeability** is **4436.5.**

**Calculating Thickness when the linear flow rate, Initial Pressure, Final Pressure and Permeability is Given.**

h = ^{q} / _{0.001127k (p1 – p2)}

Where;

h = Thickness

k = Permeability

q = Linear Flow Rate

P_{1} = Initial Pressure

P_{2} = Final Pressure

Let’s solve an example;

Find the thickness when the initial pressure is 24, final pressure is 12, permeability is 20 and linear flow rate is 30.

This implies that;

k = Permeability = 20

q = Linear Flow Rate = 30

P_{1} = Initial Pressure = 24

P_{2} = Final Pressure = 12

h = ^{q} / _{0.001127k (p1 – p2)}

h = ^{30} / _{0.001127 x 20 (24 – 12)}

h = ^{30} / _{0.02254 (12)}

h = ^{30} / _{0.27048}

h = 110.9

Therefore, the **thickness** is **110.9.**

**Calculating Initial Pressure when the linear flow rate, Thickness , Final Pressure and Permeability is Given.**

p_{1} = ^{q} / _{0.001127kh + p2}

Where;

P_{1} = Initial Pressure

q = Linear Flow Rate

h = Thickness

k = Permeability

P_{2} = Final Pressure

Let’s solve an example;

Find the initial pressure when the thickness is 16, final pressure is 20, permeability is 24 and linear flow rate is 70.

This implies that;

q = Linear Flow Rate = 70

h = Thickness = 16

k = Permeability = 24

P_{2} = Final Pressure = 20

p_{1} = ^{q} / _{0.001127kh + p2}

p_{1} = ^{70} / _{0.001127 x 24 x 16 + 20}

p_{1} = ^{70} / _{20.432768}

p_{1} = 3.425

Therefore, the **initial pressure** is **3.425.**

**Calculating Final Pressure when the linear flow rate, Thickness , Initial Pressure and Permeability is Given.**

p_{2} = p_{1} – ^{q} / _{0.001127kh}

Where;

P_{2} = Final Pressure

P_{1} = Initial Pressure

q = Linear Flow Rate

h = Thickness

k = Permeability

Let’s solve an example;

Find the final pressure when the thickness is 15, initial pressure is 28, permeability is 17 and linear flow rate is 56.

This implies that;

P_{1} = Initial Pressure = 28

q = Linear Flow Rate = 56

h = Thickness = 15

k = Permeability = 17

p_{2} = p_{1} – ^{q} / _{0.001127kh}

p_{2} = 28 – ^{56} / _{0.001127 x 15 x 17}

p_{2} = 28 – ^{56} / _{0.28735}

p_{2} = 28 – 194.88

p_{2} = -166.88

Therefore, the **final pressure** is **-166.88.**

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the linear flow rate

To get the answer and workings of the linear flow rate 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 **Linear Flow Rate**** **under **Reservoir Fluid Flow**

The screenshot below displays the page or activity to enter your value, to get the answer for the linear flow rate according to the respective parameter which are the **I****nitial pressure (P _{1}), Final Pressure (P_{2}), Thickness (h) **and

**Permeability (k).**

Now, enter the value appropriately and accordingly for the parameter as required by the **I****nitial pressure (P _{1})** is

**12**,

**Final Pressure (P**is

_{2})**22**,

**Thickness (h)**is

**18**and

**Permeability (k)**is

**44**.

Finally, Click on Calculate

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