| Element | Formula | Composition (Vol. Percent) |
| Methane | CH4 | 50 - 75 |
| Carbon Dioxide | CO2 | 25 - 45 |
| Nitrogen | N2 | <2 |
| Hydrogen Sulphide | H2S | <2 |
| Ammonia | NH3 | <1 |
| Hydrogen | H2 | <1 |