This set of Petroleum Production Operations Multiple Choice Questions & Answers (MCQs) focuses on “Workover to Alleviate Formation Damage”.
1. In workover operation, tripping speed is not important while pulling out of the hole the completion string because the completion brine has less viscous therefore the swabbing will not happen.
Explanation: The statement is false. The swabbing can happen significantly when the tripping speed is high. Swabbing will happen irrespective of whether the completion brine is viscous or not and it may get dangerous.
2. Tubing and surface equipment condition is not the which people should consider when determining the maximum pressure while bull heading.
Explanation: The statement is false. The conditions of the tubing and any type of surface facilities have to be taken under consideration. Bullheading used in the oil and gas industry is one of the well control methods. In the event of H2S, fluids are pumped down forcibly into the well to prevent the toxic gases to reach to the surface.
3. Which of the following valves is a small threaded check valve used to isolate wellbore pressure when installing on wellhead outlets?
a) TIW Valve
b) Swab Valve
d) Valve Removal Plug
Explanation: Valve Removal Plug is a threaded valve. It can be installed on the Christmas tree. It isolates wellbore pressure when it is fitted on wellhead. It can be used to remove the gate valve used in well completion.
4. Which of the following is correct regarding the Kill fluid?
a) A very-low-density mud
b) Sea Water with low density
c) Very High-density Mud
d) Brine Water with low density
Explanation: Well Killing is a case when the reservoir pressure is equal or slightly greater than the Formation fluid pressure. Kill Fluid is a fluid with high density. It is capable of producing a good hydrostatic fluid against the influx in a wellbore sufficient to shut off the flow of well.
Sanfoundry Global Education & Learning Series – Petroleum Production Operations.
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