250+ TOP MCQs on Perforating Oil & Gas Wells and Answers

Petroleum Production Operations Multiple Choice Questions on “Perforating Oil & Gas wells “.

1. What is perforation in oil and gas Wells?
a) Punching a hole in the casing or liner
b) Punching a hole in the Packer
c) Punching a hole in the Side Pocket Mandrel
d) Punching a hole in the drill string
Answer: a
Clarification: Perforation in Oil and Gas means punching a hole in the casing or liner to initiate production by making a communication between the well and the reservoir. Where, Side Pocket Mandrel is a downhole device to house several valves e.g. Gs lift valves.

2. What is Detonator in perforating gun?
a) It is the circular ring used inside the perforating gun
b) Secondary high explosive ignited by heat or shock
c) Primary high explosive ignited by heat or shock
d) It is the bullet
Answer: c
Clarification: Detonator in perforating gun is the primary high explosive ignited by heat or shock. It is used to initiate the explosive sequence. Detonators are also known as Caps or Blasting Caps.

3. Primacord is a secondary high explosive by detonator that burns at 8400 m/sec.
a) True
b) False
Answer: a
Clarification: Prima cord is a special type of particular brand of detonating cord used to blast at the time of perforation job. Perforation is an important step required to initiate the process of production after drilling and casing placing job is done.

4. Bullets or shaped charge creates the perforation detonated by the primacord.
a) True
b) False
View Answer

Answer: a
Clarification: The statement is true. To perforate or creating a communication between the well and the reservoir Bullets or Shaped charges are usually used. The detonator starts the reaction primacord propagates it and the bullets or shaped charge makes the holes.

5. In general, what is the Muzzle velocity of a bullet gun?
a) 3,100 ft/sec
b) 3,300 ft/sec
c) 5,300 ft/sec
d) 1300 ft/sec
Answer: b
Clarification: The Muzzle velocity of a bullet gun is 3,300 ft/sec. Muzzle energy is the amount of kinetic energy measured as the projectile leaves the barrel. And the Muzzle velocity is the velocity at which the bullet leaves the firearm.