This set of Petroleum Production Operations Multiple Choice Questions & Answers focuses on “Sand Control – Practical Considerations in Gravel Packing”.

1. If the uniformity coefficient is greater than 5 then what does it signifies?

a) Sand is uniform and is described by D_{10} size

b) Sand is non-uniform and is described by D_{40} size

c) Sand is very non- uniform and is described by D_{70} size

d) Sand is uniform and is described by D_{40} size

View Answer

Explanation: A uniformity coefficient is determined by comparing the 40 percentile with 90 percentile. When the uniformity coefficient is greater than 5 then it signifies Sand is non-uniform and is described by D

_{40}size.

2. If the uniformity coefficient is greater than 10 then what does it signifies?

a) Sand is uniform and is described by D_{10} size

b) Sand is non-uniform and is described by D_{40} size

c) Sand is very non- uniform and is described by D_{70} size

d) Sand is uniform and is described by D_{40} size

View Answer

Explanation: The formula of the uniformity coefficient is C= D

_{40}/D

_{90}. If the uniformity coefficient is greater than 10 then it signifies that the sand is very non- uniform and is described by D

_{70}size.

3. What is gravel-sand size Ratio according to Wagner, Gumpertz?

a) Largest gravel size/10 percentile sand size

b) 50 percentile gravel/ 50 percentile sand

c) 10 percentile gravel/ 10 percentile sand

d) Smallest gravel size/10 percentile sand size

View Answer

Explanation: Gravel-sand size Ratio according to Wagner, Gumpertz is the ratio of the largest gravel size to the 10 percentile sand size. Early work by Coberly in defining the gravel-sand size ratio considers only the problem of preventing movement of sand into the wellbore.

4. What is gravel-sand size Ratio according to Saucier?

a) Largest gravel size/10 percentile sand size

b) 50 percentile gravel/ 50 percentile sand

c) 10 percentile gravel/ 10 percentile sand

d) Smallest gravel size/10 percentile sand size

View Answer

Explanation: Gravel-sand size Ratio according to Saucier is the ratio of 50 percentile gravel size to the 50 percentile sand size. Early work by Coberly in defining the gravel-sand size ratio considers only the problem of preventing movement of sand into the wellbore.

5. What is gravel-sand size Ratio according to Schwartz?

a) Largest gravel size/10 percentile sand size

b) 50 percentile gravel/ 50 percentile sand

c) 40 percentile gravel/ 40 percentile sand

d) Smallest gravel size/10 percentile sand size

View Answer

Explanation: Gravel-sand size Ratio according to Schwartz is the ratio of 40 percentile gravel size to the 40 percentile sand size. Early work by Coberly in defining the gravel-sand size ratio considers only the problem of preventing movement of sand into the wellbore. Gravel-sand size Ratio according to Schwartz is also the ratio of 10 percentile gravel size to the 10 percentile sand size.

6. What is gravel-sand size Ratio according to Maly?

a) Largest gravel size/10 percentile sand size

b) 50 percentile gravel/ 50 percentile sand

c) 40 percentile gravel/ 40 percentile sand

d) Smallest gravel size/10 percentile sand size

View Answer

Explanation: Gravel-sand size Ratio according to Maly is the ratio of Smallest gravel size to the 10 percentile sand size. Early work by Coberly in defining the gravel-sand size ratio considers only the problem of preventing movement of sand into the wellbore.

**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__.

**Related Posts:**

- Check Petroleum Production Operations Books
- Apply for Chemical Engineering Internship
- Practice Chemical Engineering MCQs
- Check Chemical Engineering Books