Petroleum Production Operations Questions and Answers – Paraffins & Asphaltenes – Removal of Wax Deposits

This set of Petroleum Production Operations Multiple Choice Questions & Answers (MCQs) focuses on “Paraffins & Asphaltenes – Removal of Wax Deposits”.

1. Which of the following is a method of removal of wax?
a) Hot Oil Circulation
b) Packer setting
c) Packer disintegration
d) CO2 flooding
View Answer

Answer: a
Explanation: Hot Oil Circulation is a method of removal of wax. Wax precipitation is highly temperature dependent so thermal methods can be highly effective both for preventing and removing wax precipitation problems in the petroleum industry. CO2 flooding is an enhanced oil recovery method. Packer setting is the setting of the packer at the desired depth and packer disintegration is the servicing of the packer.

2. What is Hot Oil circulation in the oil and gas industry?
a) Method of Oil production
b) Method of the packer setting
c) Method of deposited wax removal
d) Method of Gas production
View Answer

Answer: c
Explanation: Hot Oil circulation in the oil and gas industry is a method of removal of wax. Wax is melted and dissolved by hot oil for the oil to move to from the bottom of the well to the surface facilities and to the subsequent transportation facilities.

3. What is Mechanical scraper?
a) Used to stop production
b) Used to remove packers
c) Used to start production of gas
d) Used to remove wax deposits from tubing
View Answer

Answer: d
Explanation: Mechanical scraper is a device used extensively to remove paraffin from the tubing. This method is more economical than other methods and is causes minimal formation damage. They can be attached to the wireline units or sucker Rods to remove wax.

4. Surfactants or dispersants can also be used in combination with hot oil and water treatments.
a) True
b) False
View Answer

Answer: a
Explanation: The statement is true. Surfactants or dispersants can also be used in combination with hot oil and water treatments. Surfactants are the general class of chemicals that are most often used to clean vessels, tanks, pipes, etc where wax may deposit.

5. What are Dispersants?
a) Type of packer
b) Type of surfactant
c) Type of gas
d) Type of reservoir
View Answer

Answer: b
Explanation: Dispersants are a type of surfactant. Dispersants affects the viscosity of the fluid. It has some positive effects on the viscosity. Dispersants which is a type of surfactant also affect the gel strength.
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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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