| 采出程度比 | 好 | 较好 | 中等 | 较差 | 差 |
| <50% | ≤5 | 5~5.5 | 5.5~6.5 | 6.5~7 | >7 |
| 50~80% | ≤6 | 6~6.5 | 6.5~7.5 | 7.5~8 | >8 |
| >80% | ≤7 | 7~7.5 | 7.5~8.5 | 8.5~9 | >9 |