NORWAY · LITHOSTRATIGRAPHY

Formations on the Norwegian shelf

The Directorate's lithostratigraphic units, from groups down to members. Each row counts the wellbores with a top filed in the unit and the core cut in it, which is the quickest way to find rock from a given formation.

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183 UNITS

Unit	Level	Part of	Wellbores	Median top, m	Cored wellbores	Core, m
Nordland Gp	Group	—	2,034	171	7	256.1
Rogaland Gp	Group	—	1,773	1,952	160	6,332.9
Hordaland Gp	Group	—	1,737	1,035	51	2,116.6
Shetland Gp	Group	—	1,643	2,179	162	6,889.8
Balder Fm	Formation	Rogaland Gp	1,361	1,964	34	579.6
Lista Fm	Formation	Rogaland Gp	1,318	2,100	56	1,049.7
Cromer Knoll Gp	Group	—	1,240	2,887	142	4,776.4
Sele Fm	Formation	Rogaland Gp	1,165	2,081	28	439.9
Viking Gp	Group	—	990	2,902	311	14,597
Utsira Fm	Formation	Nordland Gp	930	757	1	9.7
Våle Fm	Formation	Rogaland Gp	797	2,283	20	161.2
No Formal Name	Formation	—	713	1,303	73	2,225.3
Heather Fm	Formation	Viking Gp	602	3,027	150	3,144.2
Rødby Fm	Formation	Cromer Knoll Gp	602	2,964	17	156.8
Draupne Fm	Formation	Viking Gp	584	2,921	80	1,060.1
Åsgard Fm	Formation	Cromer Knoll Gp	539	2,881	47	1,225.5
Ekofisk Fm	Formation	Shetland Gp	536	2,673	57	1,824.2
Tor Fm	Formation	Shetland Gp	527	2,701	60	2,440.7
Hod Fm	Formation	Shetland Gp	451	2,782	21	340.6
Dunlin Gp	Group	—	439	3,121	113	2,729.5
Naust Fm	Formation	Nordland Gp	421	370	0	0
Kyrre Fm	Formation	Shetland Gp	418	2,277	8	105.4
Undifferentiated	Formation	—	416	1,052	50	1,495.6
Sola Fm	Formation	Cromer Knoll Gp	409	2,921	14	190.9
Brent Gp	Group	—	405	3,065	196	16,090.2
Skade Fm	Formation	Hordaland Gp	405	974	3	79.1
Blodøks Fm	Formation	Shetland Gp	395	3,188	0	0
Tare Fm	Formation	Rogaland Gp	373	1,966	1	14
Jorsalfare Fm	Formation	Shetland Gp	372	2,032	3	48.5
Brygge Fm	Formation	Hordaland Gp	366	1,688	2	26.2
Tang Fm	Formation	Rogaland Gp	361	2,023	5	187.2
Drake Fm	Formation	Dunlin Gp	355	3,281	62	698.8
Kai Fm	Formation	Nordland Gp	338	1,403	0	0
Vestland Gp	Group	—	332	3,342	172	7,930.3
Grid Fm	Formation	Hordaland Gp	331	1,467	5	55.5
Statfjord Gp	Group	—	330	3,065	95	3,695.3
Ness Fm	Formation	Brent Gp	294	3,218	117	5,406.6
Springar Fm	Formation	Shetland Gp	293	2,154	13	421.1
Svarte Fm	Formation	Shetland Gp	274	2,991	0	0
Cook Fm	Formation	Dunlin Gp	256	3,397	40	1,318.2
Hegre Gp	Group	—	254	2,807	85	4,844.6
Nise Fm	Formation	Shetland Gp	254	2,344	16	559
Heimdal Fm	Formation	Rogaland Gp	253	2,222	55	2,057.2
Båt Gp	Group	—	249	2,917	121	10,457.4
Amundsen Fm	Formation	Dunlin Gp	247	3,130	32	406.8
Etive Fm	Formation	Brent Gp	245	3,191	84	2,086.3
Tryggvason Fm	Formation	Shetland Gp	241	3,187	1	4.5
Fangst Gp	Group	—	235	3,147	142	8,801.3
Lange Fm	Formation	Cromer Knoll Gp	235	3,096	31	944.8
Rannoch Fm	Formation	Brent Gp	233	3,374	73	2,334.6
Tarbert Fm	Formation	Brent Gp	233	3,344	105	4,340.8
Spekk Fm	Formation	Viking Gp	221	3,161	18	222.8
Skagerrak Fm	Formation	Hegre Gp	220	2,895	76	3,159.5
Kvitnos Fm	Formation	Shetland Gp	216	2,600	10	234.7
Not Fm	Formation	Fangst Gp	214	3,455	64	1,198
Melke Fm	Formation	Viking Gp	212	3,272	31	322.5
Tilje Fm	Formation	Båt Gp	205	3,355	81	5,765.8
Ile Fm	Formation	Fangst Gp	199	3,623	92	3,628.8
Ror Fm	Formation	Båt Gp	194	3,873	58	1,493.1
No Group Defined	Group	—	192	3,044	54	2,589.5
Åre Fm	Formation	Båt Gp	186	2,927	52	2,154.2
Garn Fm	Formation	Fangst Gp	179	3,659	110	3,939.7
Lyr Fm	Formation	Cromer Knoll Gp	166	3,419	2	23.5
Hidra Fm	Formation	Shetland Gp	165	3,565	0	0
Kapp Toscana Gp	Group	—	163	1,166	100	7,440.9
Lysing Fm	Formation	Cromer Knoll Gp	156	3,121	24	665.5
Adventdalen Gp	Group	—	151	650	34	769.7
Tyne Gp	Group	—	151	3,854	40	1,282.7
Hugin Fm	Formation	Vestland Gp	145	3,388	86	3,553.3
Ty Fm	Formation	Rogaland Gp	144	2,529	7	158
Zechstein Gp	Group	—	143	3,081	17	196.7
Kolmule Fm	Formation	Adventdalen Gp	141	694	8	361.1
Burton Fm	Formation	Dunlin Gp	138	3,424	10	59.8
Hardråde Fm	Formation	Shetland Gp	127	2,430	3	18.8
Mandal Fm	Formation	Tyne Gp	122	3,847	10	165.3
Fruholmen Fm	Formation	Realgrunnen Subgp	118	1,308	25	896.8
Hekkingen Fm	Formation	Adventdalen Gp	118	1,344	9	77.6
Hermod Fm	Formation	Rogaland Gp	118	2,204	18	382.6
Mime Fm	Formation	Cromer Knoll Gp	117	2,878	14	70.8
Sleipner Fm	Formation	Vestland Gp	117	3,616	51	1,046.8
Smith Bank Fm	Formation	Hegre Gp	114	3,310	15	182.9
Snadd Fm	Formation	Storfjorden Subgp	112	1,014	24	751.3
Basement	Group	—	110	2,312	57	470.3
Farsund Fm	Formation	Tyne Gp	109	3,914	29	629.7
Knurr Fm	Formation	Adventdalen Gp	109	1,375	9	272.3
Fuglen Fm	Formation	Adventdalen Gp	108	1,357	17	169.9
Stø Fm	Formation	Realgrunnen Subgp	108	1,539	64	2,855.2
Sotbakken Gp	Group	—	107	470	6	265.7
Torsk Fm	Formation	Sotbakken Gp	106	472	5	114.5
Sognefjord Fm	Formation	Viking Gp	104	1,854	56	3,946.7
Frigg Fm	Formation	Hordaland Gp	103	1,949	23	1,111
Lunde Fm	Formation	Hegre Gp	101	3,125	33	2,609.6
Intra Draupne Fm Ss	Formation	Viking Gp	97	2,596	56	1,439.7
Fensfjord Fm	Formation	Viking Gp	96	2,102	30	1,649.6
Tofte Fm	Formation	Båt Gp	94	4,390	30	928.1
Kolje Fm	Formation	Adventdalen Gp	93	1,545	2	24.8
Bryne Fm	Formation	Vestland Gp	89	3,430	14	437.3
Nordmela Fm	Formation	Realgrunnen Subgp	86	1,874	37	1,901.2
Tuxen Fm	Formation	Cromer Knoll Gp	85	3,586	1	9.1
Tubåen Fm	Formation	Realgrunnen Subgp	78	1,875	22	937.9
Intra Heather Fm Ss	Formation	Viking Gp	75	3,098	36	1,517.9
Oseberg Fm	Formation	Brent Gp	74	3,464	25	915.7
Ula Fm	Formation	Vestland Gp	74	3,856	39	1,880.8
Nygrunnen Gp	Group	—	67	844	2	23.2
Sassendalen Gp	Group	—	67	1,868	26	827.3
Kobbe Fm	Formation	Sassendalen Gp	65	1,868	22	569.3
Boknfjord Gp	Group	—	58	2,114	3	30.1
Eiriksson Fm	Formation	Statfjord Gp	58	3,225	18	555.6
Sandnes Fm	Formation	Vestland Gp	58	2,630	20	603.9
Nansen Fm	Formation	Statfjord Gp	56	3,045	18	350.1
Undefined Gp	Group	—	56	2,064	21	358.8
Maureen Fm	Formation	Rogaland Gp	55	2,831	2	35.5
Grey Beds (informal)	Group	—	54	2,604	6	85
Vidar Fm	Formation	Rogaland Gp	54	3,090	0	0
Flekkefjord Fm	Formation	Boknfjord Gp	52	2,123	0	0
Intra Balder Fm Ss	Formation	Rogaland Gp	52	2,143	15	156.7
Rotliegend Gp	Group	—	52	3,174	18	315.3
Krossfjord Fm	Formation	Viking Gp	51	1,927	4	133.6
Sauda Fm	Formation	Boknfjord Gp	50	2,129	1	9.1
Tau Fm	Formation	Boknfjord Gp	48	2,351	0	0
Haugesund Fm	Formation	Tyne Gp	46	4,181	8	78.4
Klappmyss Fm	Formation	Sassendalen Gp	46	2,212	5	94.5
Egersund Fm	Formation	Boknfjord Gp	43	2,426	2	21
Broom Fm	Formation	Brent Gp	42	2,892	7	39.1
Johansen Fm	Formation	Dunlin Gp	41	2,702	3	103.8
Red Beds (informal)	Group	—	41	2,644	7	95.5
Forties Fm	Formation	Rogaland Gp	34	3,025	9	300.1
Havert Fm	Formation	Sassendalen Gp	34	2,447	7	115.5
Kveite Fm	Formation	Nygrunnen Gp	34	1,004	2	23.2
Raude Fm	Formation	Statfjord Gp	33	3,067	5	182.6
Kviting Fm	Formation	Nygrunnen Gp	32	683	0	0
Rogn Fm	Formation	Viking Gp	30	2,184	16	412.8
Agat Fm	Formation	Cromer Knoll Gp	26	2,876	12	936.8
Tempelfjorden Gp	Group	—	26	2,461	10	466.4
Egga Fm (informal)	Formation	Rogaland Gp	25	1,848	10	461.2
Gipsdalen Gp	Group	—	25	2,118	14	1,015.5
Kupferschiefer Fm	Formation	Zechstein Gp	25	3,065	1	7
Intra Melke Fm Ss	Formation	Viking Gp	23	2,433	9	549
Ørn Fm	Formation	Gipsdalen Gp	23	2,129	13	724.7
Røye Fm	Formation	Tempelfjorden Gp	23	2,517	9	420
Vade Fm	Formation	Hordaland Gp	16	2,101	1	15
Gassum Fm	Formation	—	14	2,609	1	18.1
Ørret Fm	Formation	Tempelfjorden Gp	14	2,489	2	46.5
Bjarmeland Gp	Group	—	13	3,502	9	349.2
Fiskebank Fm	Formation	Rogaland Gp	13	1,307	1	2.6
Molo Fm	Formation	Nordland Gp	13	441	0	0
Falk Fm	Formation	Gipsdalen Gp	12	1,983	4	271.8
Andrew Fm	Formation	Rogaland Gp	11	3,030	2	45.8
Lomvi Fm	Formation	Hegre Gp	11	3,532	4	128.5
Reke Mbr	Member	Fruholmen Fm	11	1,729	3	27.7
Teist Fm	Formation	Hegre Gp	11	3,298	1	14.4
Isbjørn Fm	Formation	Bjarmeland Gp	10	3,625	4	95.6
Eldfisk Fm	Formation	Tyne Gp	9	4,148	3	118.6
Akkar Mbr	Member	Fruholmen Fm	8	1,869	2	40.4
Fjerritslev Fm	Formation	—	8	2,952	1	11.7
Klippfisk Fm	Formation	Adventdalen Gp	8	638	1	0
Ran Sandstone Units	Formation	Cromer Knoll Gp	7	2,396	2	26
Ulv Fm	Formation	Bjarmeland Gp	7	3,586	4	74.3
Krabbe Mbr	Member	Fruholmen Fm	6	2,122	1	145.5
Ugle Fm	Formation	Gipsdalen Gp	6	2,227	2	39
Polarrev Fm	Formation	Bjarmeland Gp	5	4,000	1	159.4
Realgrunnen Subgp	Subgroup	Kapp Toscana Gp	5	732	3	68.1
Alge Mbr	Member	Hekkingen Fm	4	2,095	0	0
Billefjorden Gp	Group	—	4	2,387	3	63.8
Børglum Unit	Formation	Boknfjord Gp	4	1,764	0	0
Delfin Fm (informal)	Formation	Shetland Gp	4	3,373	3	258.8
Krill Mbr	Member	Hekkingen Fm	4	1,920	1	12.7
Intra Åsgard Fm Ss	Formation	Cromer Knoll Gp	3	2,068	2	3.6
Meile Mbr (informal)	Member	Heimdal Fm	3	2,327	0	0
Soldogg Fm	Formation	Billefjorden Gp	3	2,358	1	27.5
Steinkobbe Fm	Formation	Sassendalen Gp	3	1,693	0	0
Tettegras Fm	Formation	Billefjorden Gp	3	2,202	1	27.4
Alke Fm	Formation	Hegre Gp	2	3,431	0	0
Blærerot Fm	Formation	Billefjorden Gp	2	2,415	0	0
No Data	Group	—	2	1,992	0	0
Fladen Gp	Group	—	1	4,162	0	0
Rattray Fm	Formation	Fladen Gp	1	4,162	0	0
Batalden Fm (inform)	Formation	Nordland Gp	0	—	0	0
Kutling Mbr	Member	Klippfisk Fm	0	—	0	0
Snotra Fm	Formation	Nordland Gp	0	—	0	0
Storfjorden Subgp	Subgroup	Kapp Toscana Gp	0	—	0	0
Tampen Spur Mbr	Member	Naust Fm	0	—	0	0
Utsira Subgp	Subgroup	Nordland Gp	0	—	0	0

About this data

Norwegian Offshore Directorate (Sodir) FactPages, mirrored nightly and used under the Norwegian Licence for Open Government Data (NLOD). Wellbores counts those with a top filed in the unit; the median is of those tops, in metres along the wellbore. Core is the cored length the Directorate files per unit and wellbore, added up.

Developers: this page as JSON is GET /v1/data/norway/formations, documented in the API reference.