| Components | The Sinegorski Spa, well No 8-Kl-1 | The Yuzno-Sakhalinski mud volcano | The Lesogorski thermal spring | The Volchanski spa, well No 92 |
| vol.% | ||||
| N2 | 10.9 | 2.32 | 9.4 | 6.9 |
| O2 | 0.89 | 0.28 | 1.9 | 0.5 |
| CO2 | 0.01 | 81.12 | 0.4 | 60.6 |
| СН4 | 87.17 | 16.1 | 81.5 | 31.9 |
| ‰ VPDB | ||||
| δ 13С(CH4) | −27.5 | −28.1 | −45.9 | - |
| δ 13С(CО2) | −30.6 | −3.3 | −39.1 | - |
| δ 2Н (CH4) | −84.2 | −72.3 | - | - |