| Specific Gravity | API Gravity | High perm | Medium perm | Low perm | Tight (Shale) |
|---|
| frac | API | > 100 md | 10 md ÷ 100 md | 0.1 md ÷ 10 md | < 0.1 md |
|---|
| Gas |
|
|
|
|
|
|
|---|
| Gas Condensate |
| > 45° |
|
|
|
|
|---|
| Light Oil | < 0.87 | > 31.1° |
|
|
|
|
|---|
| Medium Oil | 0.87 ÷ 0.92 | 22.3° ÷ 31.1° |
|
|
|
|
|---|
| Heavy Oil | 0.92 ÷ 1.0 | 10° ÷ 22.3° |
|
|
|
|
|---|
| Extra Heavy Oil (Bitumen) | > 1.0 | 4° ÷ 10° |
|
|
|
|
|---|
where box colors mean:
|
