This set of Petroleum Production Operations Multiple Choice Questions & Answers (MCQs) focuses on “Causes of Scale Deposition”.
1. Which of the following is correct regarding the oilfield scale Gypsum?
a) Used to limit the growth of microbes
b) Used to lower the surface tension
c) To protect casing and equipment from corroding
d) Form of calcium sulfate precipitate or scale
View Answer
Explanation: A common form of calcium sulfate precipitate or scale. CaSO4-H2O abbreviated as gyp. Wells that are producing water are more likely to develop deposits of inorganic scale. Scale can reduce the productivity of the well.
2. Calcite deposition is mostly a self-scaling process.
a) True
b) False
View Answer
Explanation: The statement is true. Calcite deposition is mostly a self-scaling process. The main driving force for its formation is the loss of Carbon dioxide from the water to the hydrocarbon phase(s) as pressure drops.
3. Scaling is also a self-scaling process.
a) True
b) False
View Answer
Explanation: The statement is false. The corrected statement is that Barite scales are generally the result of mixing incompatible waters. For example, seawater is often injected into offshore reservoirs for pressure maintenance.
4. What is a lubricator?
a) A wire
b) Low-pressure cylinder
c) Right lay
d) High-pressure cylinder
View Answer
Explanation: Lubricator is a high-pressure pipe attached to the wellhead. The Integral Lubricator Section is a pressure containing cylinder used when performing wireline operations in the oil and gas industry.
5. Which of the following is correct regarding Zirconium Complex?
a) Prevents precipitation of metal oxides
b) Used to maintain the fluid viscosity as the temperature increases
c) Carrier fluid for guar gum in liquid gels
d) Product Stabilizer
View Answer
Explanation: The correct statement regarding the Zirconium Complex is that it is used to maintain the fluid viscosity as the temperature increases. It is a type of additive used at the time of hydraulic fracturing jobs in the oil and gas industry.
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