The image above represents well drainage area.

To compute for the well drainage area, three essential param xeters are needed and these parameters are **Total Area of Field (A _{T}), Well Flow Rate (q_{w}) **and

**Field Flow Rate (q**

_{r}).The formula for calculating the well drainage area:

A_{w} = A_{r}[^{qw} / _{qr}]

Where;

A_{w} = Well Drainage Area

A_{T} = Total Area of Field

q_{w} = Well Flow Rate

q_{r} = Field Flow Rate

Let’s solve an example;

Find the well drainage area when the total area of field is 11, well flow rate is 9 and the field flow rate is 6.

This implies that;

A_{T} = Total Area of Field = 11

q_{w} = Well Flow Rate = 9

q_{r} = Field Flow Rate = 6

A_{w} = A_{T}[^{qw} / _{qr}]

A_{w} = 11[^{9}/_{6}]

A_{w} = 11[1.5]

A_{w} = 16.5

Therefore, the **well drainage area **is **16.5 ft². **

**Calculating the Total Area of Field when Well Drainage Area, Well Flow Rate and Field Flow Rate is Given.**

A_{T} = A_{w} (^{qr} / _{qw})

Where;

A_{T} = Total Area of Field

A_{w} = Well Drainage Area

q_{w} = Well Flow Rate

q_{r} = Field Flow Rate

Let’s solve an example;

Find the total area of field when the well drainage area is 32, well flow rate is 11 and the field flow rate is 14.

This implies that;

A_{w} = Well Drainage Area = 32

q_{w} = Well Flow Rate = 11

q_{r} = Field Flow Rate = 14

A_{T} = A_{w} (^{qr} / _{qw})

A_{T} = 32 (^{14} / _{11})

A_{T} = 32 (1.272)

A_{T} = 40.704

Therefore, the **total area of field** is **40.704.**

**Calculating the Field Flow Rate when Well Drainage Area, Total Area of Field and Well Flow Rate is Given.**

q_{r} = q_{w} (^{Ar} / _{Aw})

Where;

q_{r} = Field Flow Rate

A_{T} = Total Area of Field

A_{w} = Well Drainage Area

q_{w} = Well Flow Rate

Let’s solve an example;

Find the field flow rate when the well drainage area is 42, total area of field is 32 and the well flow rate is 24.

This implies that;

A_{w} = Well Drainage Area = 42

A_{T} = Total Area of Field = 32

q_{w} = Well Flow Rate = 24

q_{r} = q_{w} (^{AT} / _{Aw})

q_{r} = 24 (^{32} / _{42})

q_{r} = 24 (0.7619)

q_{r} = 18.285

Therefore, the **Field**** Flow Rate** is **18.285.**

**Calculating the Well Flow Rate when Well Drainage Area, Total Area of Field and Field Flow Rate is Given.**

q_{w} = q_{r} (^{Aw} / _{AT})

Where;

q_{w} = Well Flow Rate

q_{r} = Field Flow Rate

A_{w} = Well Drainage Area

A_{T} = Total Area of Field

Let’s solve an example;

Find the well flow rate when the well drainage area is 45, total area of field is 38 and the field flow rate is 44.

This implies that;

q_{r} = Field Flow Rate = 44

A_{w} = Well Drainage Area = 45

A_{T} = Total Area of Field = 38

q_{w} = q_{r} (^{Aw} / _{AT})

q_{w} = 44 (^{45} / _{38})

q_{w} = 44 (1.184)

q_{w} = 52.105

Therefore, the **well flow rate** is **52.105.**

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the well drainage area

To get the answer and workings of the well drainage area 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 **Well Drainage Area**** **under **Reservoir Fluid Flow**

The screenshot below displays the page or activity to enter your value, to get the answer for the well drainage area according to the respective parameter which are the **Total Area of Field (A _{T}), Well Flow Rate (q_{w}) **and

**Field Flow Rate (q**

_{r}).Now, enter the value appropriately and accordingly for the parameter as required by the **Total Area of Field (A _{T})** is

**11**,

**Well Flow Rate (q**is

_{w})**9**and

**Field Flow Rate (q**is

_{r})**6.**

Finally, Click on Calculate

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