What are the classification of crude oil?

Related questions

1. What is the difference between Brent crude oil and West Texas crude oil?
2. Why Brent is higher than WTI?
3. Why is WTI crude cheaper than Brent?
4. Is Bakken oil Brent or WTI?
5. What is the best crude oil?
6. What is the current price of crude oil?
7. What is crude oil WTI and Brent?
8. What does Brent crude mean?

Tags

1. #amounts
2. #helium
3. #composed
4. #pumped
5. #hydrogen
6. #predominantly
7. #petroleum
8. #called
9. #varying
10. #carbon
11. #sulfur
12. #percent
13. #wells
14. #oxygen
15. #nitrogen
16. #classification
17. #basics
18. #contains
19. #liquid
20. #approximately
21. #crude