This set of Petroleum Production Operations Multiple Choice Questions & Answers (MCQs) focuses on “Squeeze Cementing – Other Operational Procedure”.
1. What is the two-stage sodium silicate cement system?
a) To plug a fractured zone in a two-stage treatment
b) It is not used for plugging purpose
c) Used to plug a low permeable zone
d) Used to perforate a zone
View Answer
Explanation: Two-stage sodium silicate cement system is mainly used to plug a fractured, vuggy or most permeable zone in a two-stage treatment. In the first stage, silicate like polymer solution containing fibrous materials is used and the second stage contains squeeze cementing.
2. What is Plug back operation?
a) To plug a fractured zone in a two-stage treatment
b) It is not used for plugging purpose
c) Used to plug a low permeable zone
d) Used to abandonment in open hole
View Answer
Explanation: Plug back operation is mainly used abandonment in open hole since bridge plugs can be used in a cased hole. A Plug back operation is designed to completely fill some selected portion of the hole.
3. Mixing of cement should be done by hopper method in order to obtain a uniform slurry.
a) True
b) False
View Answer
Explanation: The statement is False. The corrected statement is Mixing of cement should be done by the batch method in order to obtain a uniform slurry. Exact proportioning of the ingredients is required for this purpose.
4. Why is the Thixotropic cement is used?
a) Used to plug a low permeable zone
b) It is not used for plugging purpose
c) Used in loss circulation
d) Used to abandonment in open hole
View Answer
Explanation: Thixotropic cement is used in loss circulation. It is intended to control the lost circulation in vuggy, fractured or highly permeable zones, such that a seal around the wellbore can be obtained by doing so.
5. What is Thixotropic cement?
a) API Class G cement + (6-8)% sulfate
b) API Class H cement + (6-8)% sulfate
c) API Class H cement + (16-18)% sulfate
d) API Class G cement + (16-18)% sulfate
View Answer
Explanation: Thixotropic cement is the mixture of API Class G cement + (6-8)% sulfate. It is used in fractured or vuggy formations or formations with high permeability such that a seal around the wellbore can be obtained.
Sanfoundry Global Education & Learning Series – Petroleum Production Operations.
To practice all areas of Petroleum Production Operations, here is complete set of 1000+ Multiple Choice Questions and Answers.
If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]
- Apply for Chemical Engineering Internship
- Check Chemical Engineering Books
- Practice Chemical Engineering MCQs
- Check Petroleum Production Operations Books
