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Petroleum Production Operations Multiple Choice Questions on “Problem Wells”.
1. Which of the following doesn’t lie in the domain of the problem well?
a) High GOR
b) High Water-cut over the economic limit
c) High Oil production under the economic limit
d) Mechanical Stuck
View Answer
Answer: c
Clarification: Problem wells are those which have some type of problem associated with it. E.g. High Gas Oil ratio, High water cut, high gas cut in oil wells or any type of mechanical stuck. High Oil production under the economic limit is favorable.
2. Which of the following need not to be done as remedial measures for the sick well?
a) Workover Job
b) Pressure maintenance
c) EOR
d) Sand production
Answer: d
Clarification: Sand production need not be done as a remedial measure. Workover Job may need to be done e.g. freeing a stuck pipe, fishing, etc. Pressure maintenance can be done by injection gas. EOR is the enhanced oil recovery technique that may need to be done as tertiary recovery.
3. A well is having limited production rate. It may be called as a Problem Well.
a) True
b) False
Answer: a
Clarification: The statement is true. Problem wells are those which have some type of problem associated with it. E.g. High Gas Oil ratio, High water cut, high gas cut in oil wells or any type of mechanical stuck, limited production rate. If a well has a limited production rate then it is not beneficial for the company.
4. Which of the following may not be the cause of the Low Production rate?
a) Low Permeability
b) Low reservoir Pressure
c) Formation damage
d) Low GOR in oil well
View AnswerAnswer: d
Clarification: Low GOR in oil well may not be the cause of a Low Production rate. Low Permeability is the case when the reservoir is less permeable to the oil or gas production. Formation damage is the damage of the formation when the pores of the formation are plugged by unwanted materials and Low GOR is favorable to the oil well.
5. Which of the following may be used to differentiate between the low permeability and formation damage?
a) Low GOR in oil well
b) Flow meter survey
c) Crossover sub
d) Slickline
View Answer
Answer: b
Clarification: Flow meter survey may be used to differentiate between the low permeability and formation damage. Formation damage is the damage of the formation when the pores of the formation are plugged by unwanted materials. Other methods to differentiate the low permeability and formation damage are by Pressure Buildup Tests.
6. For reservoir with appreciable loss of reservoir pressure, which of the following may increase the production of the well?
a) Logging
b) Slickline
c) Artificial lift
d) Well Testing
View Answer
Answer: c
Clarification: Artificial lift techniques will certainly help the engineers to increase the production of the well among the choices provided. When the self flow of the well is decreased then we install the Artificial lift techniques to reduce the bottom hole flowing pressure to assist the oil to lift up.
7. Reperforating will help to increase the production of the well if the perforations are plugged.
a) True
b) False
Answer: a
Clarification: The statement is true. If the pores of the perforations are plugged by gun slugs, mud or any other unwanted materials then they should be cleaned out properly, in this case, Reperforating will help to increase the production of the well.