Petroleum Production Operations Mcqs

Q:

A normal annular preventer will seal pressure on the dual string completion when closed.

A) True B) False
 
Answer & Explanation Answer: B) False

Explanation: The statement is false. An annular preventer cannot seal the pressures coming out of dual string. There exist rubber seals on the annular preventer which will not able to seal the space between the two strings i.e. partial sealing will be there.

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Q:

As long as the fluid weight is more than formation pressure, you can use solid free brine to control the well which has high permeable zones.

A) True B) False
 
Answer & Explanation Answer: B) False

Explanation: The statement is false. The weight is not a sole parameter to judge the well operation but at the same time, solids are also important to prevent any type of losses and to suspend the cuttings.

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Q:

Which of the following method can be used as remedial measures for plugged perforation?

A) Breaking the perforation with ball sealer B) Use of viscous gel
C) Reaming D) Chemical treatment
 
Answer & Explanation Answer: A) Breaking the perforation with ball sealer

Explanation: The perforation can be broken with the help of ball sealers. Ball sealers are used to plug the perforation. It is added with the treatment fluid to be used for any particular well treatment in the oil and gas industry.

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42
Q:

With gas migration in a shut-in well, which one does not increase?

A) Gas bubble pressure B) Surface pressure
C) Bottom hole pressure D) Shut-in drill pipe pressure
 
Answer & Explanation Answer: A) Gas bubble pressure

Explanation: Gas bubble pressure is not going to increase when the gas migrates in a well when it is shut-in. Gases have very little density at the same time they are more mobile, so they move upward.

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Q:

Personnel observes that the annulus pressure on a producing well increases from 0 psi to 300 psi. The well has the packer set to isolate annuls. What does this indicator tell you?

A) The packer is leaking B) Temperature in the annulus increases.
C) The temperature in the annulus decreases D) The packer is leaking and there is a rise in temperature in the annulus
 
Answer & Explanation Answer: D) The packer is leaking and there is a rise in temperature in the annulus

Explanation: If there is a drastic rise in the pressure and at the same time there is a packer then the possibilities of leakage of the packer and there is a rise in the temperature of the annulus.

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Q:

What is the objective of the volumetric well control?

A) Maintain bottom hole pressure constant and allow gas to migrate to the surface B) Maintain influx pressure constant
C) Maintain shoe pressure constant D) To release the packer
 
Answer & Explanation Answer: A) Maintain bottom hole pressure constant and allow gas to migrate to the surface

Explanation: The volumetric well control is used in the workover i.e. any type of well interventions and also in production wells. In this method, the pressure in the bottom hole is maintained constant while allowing gas to flow to the surface.

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30
Q:

15 bbl/hr of partial losses are recorded and there is no tubing in the well. If personnel fails to keep the hole full for 5 hours, what is bottom hole pressure reduction after 5 hours if the casing capacity is 0.035 bbl/ft and the current mud weight is 9.2 ppg?

A) 950 psi B) 1025 psi
C) 1255 psi D) 550 psi
 
Answer & Explanation Answer: B) 1025 psi

Explanation: Total losses in the volume in five hours can be calculated by multiplying the partial losses with total time i.e. 15 × 5 = 75 bbl. The height of the 75 bbl of losses of mud can be calculated by dividing loss in volume/casing capacity = 75/0.035 ft = 2143 ft. Therefore, the hydrostatic loss = 0.052 ×2143 ×9.2 =1025 psi.

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33
Q:

The subsurface safety valve is recently tested and the result is good. Personnel can just only shut the well in using a subsurface safety valve without installing a back pressure valve and then remove the x-mas tree.

A) True B) False
 
Answer & Explanation Answer: B) False

Explanation: The statement is false. A subsurface safety valve is installed on the upper side of the well. It is used in any type of dangerous situation when it is compulsory to stop the flow of the fluid at the time of emergency.

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