Four types of hydrocarbon molecules appear in crude oil.
|
Composition by weight |
||
|
Hydrocarbon |
Average |
Range |
|
Paraffins/Alkanes |
30% |
15 to 60% |
|
Naphthenes/cycloalkanes |
49% |
30 to 60% |
|
15% |
3 to 30% |
|
|
6% |
remainder |
|