| Oil Prone Generation | Gas Prone Generation | ||
| Generation Stage | Ro (%) | Generation Stage | Ro (%) |
| Immature | <0.6 | Immature | <0.8 |
| Early oil | 0.6 - 0.8 | Early gas | 0.8 - 1.2 |
| Peak oil | 0.8 - 1.0 | Peak gas | 1.2 - 2.0 |
| Late oil | 1.0 - 1.35 | Late gas | >2.0 |
| Wet gas | 1.35 - 2.0 | ||
| Dry gas | >2.0 | ||