This set of Petroleum Production Operations Multiple Choice Questions & Answers (MCQs) focuses on “Workover for Low Permeability Well”.
1. Which of the following valve should be used at the time of an emergency?
a) Crown Valve
b) Upper Master Valve
c) Lower Master Valve
d) Choke Valve
View Answer
Explanation: Lower master valve should be used at the time of emergency. Lower Master Valve is attached to the Christmas tree. Master valves should work properly so that at the time of emergency the fluid flow can be controlled.
2. For bullheading a well, the required bullhead volume and strokes calculations used are ___
a) From surface to the bottom perforations
b) From surface to the top perforations
c) Surface to side pocket mandrel
d) Packer to perforation
View Answer
Explanation: The correct answer is from the surface to the bottom of the perforations. The volume of kill fluid can be calculated by using the formula volume of kill fluid = The volume of tubing + the volume below the tubing to the top of perforations.
3. Workover is the operations required to maintain the optimum producing conditions of the reservoir.
a) True
b) False
View Answer
Explanation: The statement is true. If there exists any kind of production decline or to optimize the production from a particular oil and gas wells workover is required to increase its productivity index.
4. Which of the following is correct regarding the workover for the low permeable reservoir?
a) The effective artificial technique is required
b) Packer has to be fitted
c) Side pocket mandrel is needed
d) Landing nipple is to be installed
View Answer
Explanation: For the workover operations or to take production from a low permeable reservoir effective Artificial techniques has to be installed to ensure optimum production from the reservoir.
5. In hard carbonate reservoirs, acid fracturing cannot be used.
a) True
b) False
View Answer
Explanation: The statement is false. Hydraulic fracturing and propping are needed in sandstone and carbonate reservoirs to increase the permeability of the reservoir by creating direct flow channels. In hard carbonate reservoirs, the acid fracturing job can be done for improvement.
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