Gas composition per borehole can be downloaded by the following link
Gas composition maps
| Gas composition of the Upper North Sea Group |  _2006 |
| Gas composition of the Lower North Sea Group | _2006 |
| Gas composition of the Chalk Group | _2006 |
| Gas composition of the Rijnland Group | _2006 |
| Gas composition of the Niedersachsen, Schieland and Scruff Groups | _2006 |
| Gas composition of the Altena Group | _2006 |
| Gas composition of the Upper Germanic Triassic Group | _2006 |
| Gas composition of the Lower Germanic Triassic Group | _2006 |
| Gas composition of the Zechstein Group | _2006 |
| Gas composition of the Upper Rotliegend Group | _2006 |
| Gas composition of the Limburg Group | _2006 |
Caloric value maps
| Caloric values of the North Sea Supergroep | _2006 |
| Caloric values of the Chalk Group | _2006 |
| Caloric values of the Rijnland Group | _2006 |
| Caloric values of the Niedersachsen, Schieland and Scruff Groups | _2006 |
| Caloric values of the Altena Group | _2006 |
| Caloric values of the Upper-Germanic Triassic Group | _2006 |
| Caloric values of the Lower-Germanic Triassic Group | _2006 |
| Caloric values of the Zechstein Group | _2006 |
| Caloric values of the Upper Rotliegend Group | _2006 |
| Caloric values of the Limburg Group | _2006 |