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**Understand Boyle’s Gas Law**

Boyle’s law states that at constant temperature, the absolute pressure and the volume of a gas are inversely proportional in case of constant temperature within a closed system. It may sound pretty hard to understand what it is.

Well, we can describe the statement above into simple mathematics as following formula:

**Boyle’s Gas Law: P x V = constant**

Or express Boyle’s law in another term: **P1 x V1 = P2 x V2**

Where; **P = Pressure** and **V = Volume**

It sounds easy a little bit to understand.

**Let’s apply Boyle’s law into our drilling business**

Calculate the volume of gas you will have on the surface, 14.7 psi for atmospheric pressure, when 1 bbl of gas kick is circulated out from reservoir where has formation pressure of 3,000 psi.

Boyle’s Gas Law: P1 x V1 = P2 x V2

P1= 3000 psi (reservoir pressure)

V1 = 1 bbl (volume at bottom hole)

P2 = 14.7 psi (atmosphere pressure)

V2 = ? (volume at surface)

P1 x V1 = P2 x V2

3000 x 1 = 14.7 x V2

V2 = 204 bbl

**Reference book: ****Well Control Books**

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Thank you for your useful information. Kindly send me some Litrature fo Silicate Mud system and send us the testing procedure of Sodium Silicate in the system.

Isn’t “P*V=const” when “T=const”?

Otherwise, it should be “(P*V)/T=const”. If I remember school programm well.

Boyle’s Law is based on the Templerature constant therefore P x V = constant like you said.

What I mean is that temperature of resourvoir is higher than temperature on surface.

You need to apply temperature into the equation so the relationship will be PV/T = znRT.

Thank you for your useful information. Kindly send me some Litrature fo Silicate Mud system and send us the testing procedure of Sodium Silicate in the system.

Thank you for your useful information. Kindly send me some Literature on Glycol mud system and Silicate Mud system and send us the testing procedure of Glycol and Sodium Silicate in the system.

Hi Fortune,

We don’t have the document you request. If we can find it, we will send you.

Regards,

DF team