| Methane (CH4) | Carbon dioxide (CO2) | Hydrogen sulfide (H2S) | Nitrogen (N2) | Ethane (C2H6) | Propane (C3H8) | Butane (C4H10) | Water (H2O) |
| 65% | 12% | 4% | 0.5% | 10% | 5% | 2.5% | 1.0% |