250+ TOP MCQs on Functions Requirements Selection Criteria and Answers

Petroleum Production Operations Multiple Choice Questions on “Functions Requirements Selection Criteria”.

1. What is a Workover fluid?
a) Fluids coming out of the formation during workover
b) Produced Oil during workover
c) Produced Gas during workover
d) Fluid placed against the producing formation during workover
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Answer: d
Clarification: The correct definition of the Workover fluid is the fluid placed against the producing formation during workover. It can be used in different types of operations e.g. well killing, cleaning out, drilling in, plugging back, controlling sand or perforating.

2. What is the condition of the IPR curve not to be straight?
a)When the only produced fluid is gas
b) When the only produced fluid is oil
c) When the only produced fluid is water
d) All IPR plots are curved
Answer: a
Clarification: The correct statement is when the only produced fluid is gas then the IPR curve is not straight. The full form of IPR is Inflow Performance Relationship. It is plotted Bottom hole flowing pressure versus the Flow Rate.

3. Which of the following is not a property in the selection of the workover fluid?
a) Fluid Density
b) Solid Content
c) Fluid Loss
d)IPR
Answer: d
Clarification: IPR is not a property in the selection if the workover fluid. Fluid Density should not be higher than the formation pressure but to balance the pressure 100 – 200 psi over a tolerance limit can be used. Ideally, the fluid should contain no solids to avoid formation and perforation plugging. Bridging at the formation face by properly sized acid soluble particles is a desirable approach to prevent fluid loss.

4. Mechanical Consideration is not a property in the selection of the workover fluid.
a) True
b) False
Answer: b
Clarification: The statement is False. The correct statement is Mechanical Consideration is a property in the selection of the workover fluid. Rig equipment that is available for mixing, storage, solids removal and circulating is a major factor in the selection of workover fluid.

5. Corrosion Product is a property in the selection of the workover fluid.
a) True
b) False
Answer: a
Clarification: The statement is true. Corrosion Product is a property in the selection of the workover fluid. A reasonable upper limit of corrosivity for completion or workover fluid is 0.05 lb/ft² per work over.