 |
| Proved Reserve: 9 phrases in 7 subjects |
| Accounting | 1 |
| Drilling | 1 |
| General | 1 |
| Oil / petroleum | 1 |
| Oil and gas technology | 1 |
| Sakhalin | 1 |
| Technology | 3 |
|
| Proved Reserve: 9 phrases in 7 subjects |
| Accounting | 1 |
| Drilling | 1 |
| General | 1 |
| Oil / petroleum | 1 |
| Oil and gas technology | 1 |
| Sakhalin | 1 |
| Technology | 3 |