The image above represents gas flow.

To compute for the gas flow, four essential parameters are needed and these parameters are **Performance Co-efficient (C), Average Reservoir Pressure (P _{r}^{*}), Flowing Bore Hole Pressure (P_{wf}^{*}) and Exponent (n).**

The formula for calculating the gas flow:

Q_{g} = C(P_{r}^{*}² – P_{wf}^{*}²)^{n}

Where;

Q_{g} = Gas Flow

C = Performance Co-efficient

P_{r}^{*} = Average Reservoir Pressure

P_{wf}^{*} = Flowing Bore Hole Pressure

n = Exponent

Let’s solve an example;

Find the gas flow when a performance Co-efficient is 9, average reservoir pressure is 10, flowing bore hole pressure is 5 and an exponent of 20 is given.

This implies that;

C = Performance Co-efficient = 9

P_{r}^{*} = Average Reservoir Pressure = 10

P_{wf}^{*} = Flowing Bore Hole Pressure = 5

n = Exponent = 20

Q_{g} = C(P_{r}^{*}² – P_{wf}^{*}²)^{n}

Q_{g} = 9(10² – 5²)20

Q_{g} = 9(100 – 25)20

Q_{g} = 9(75)20

Q_{g} = 9(3.17e+37)

Q_{g} = 2.85e+38

Therefore, the **gas flow **is **2.85e+38**.