Barents Sea – Lower Carboniferous plays

	Group/Formation	Age	Area	Reservoir rock	Depositional environment	Trap	Source rock	Critical factors	Examples exploration wells
bcl-3	Billefjorden Group with Blærerot, Tettegras and Soldogg Formations	Tournaisian - Viséan	Finnmark Platform	Sandstone and conglomerates	Fluvial and alluvial, river and floodplain deposits	Structural and stratigraphic	Upper Devonian - Lower Carboniferous coal and carbonaceous shales (Billefjorden Group)	Preservation and leakage owing to tilting, reactivation of faults and Cenozoic uplift and erosion, especially for shallow and/or truncated structures.	7128/4-1 7128/6-1
bcl-4 (unconfirmed)	Billefjorden Group with Blærerot, Tettegras and Soldogg Formations	Tournaisian - Viséan	Loppa High, Polheim Sub-platform and Stappen High	Sandstone and conglomerates	Fluvial and alluvial, river and floodplain deposits	Structural and stratigraphic	Upper Devonian - Lower Carboniferous coal and carbonaceous shales (Billefjorden Group)	Preservation and leakage owing to tilting, reactivation of faults and Cenozoic uplift and erosion, especially for shallow and/or truncated structures.	7120/2-1