The Brent Group is a stratigraphic group of Middle Jurassic age. It is an important hydrocarbon reservoir in the Northern North Sea. It is named for the Brent oil field, where it forms one of the reservoir units.[1][2] It is subdivided into five formations, in order of age, the Broom, Rannoch, Etive, Ness and Tarbet Formations whose first letters spell out the name of the group.[3]

Brent Group
Stratigraphic range: AalenianBathonian
TypeGroup (stratigraphy)
Sub-unitsBroom Formation, Rannoch Formation, Etive Formation, Ness Formation and Tarbet Formation
UnderliesHeather Formation
OverliesDrake Formation
AreaEast Shetland Basin, Viking Graben
Thicknessup to 300 metres (980 ft)
Lithology
PrimarySandstone
OtherMudstone, Coal
Location
RegionNorth Sea
Type section
Named forBrent oil field

References

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  1. ^ Richards, P.C. "An introduction to the Brent Group: a literature review". In Morton, A.C.; Haszeldine, R.S.; Giles, M.R.; Brown, S. (eds.). Geology of the Brent Group. Special Publications. Vol. 61. Geological Society. pp. 15–26. doi:10.1144/GSL.SP.1992.061.01.03.
  2. ^ British Geological Survey. "Brent Group". The BGS Lexicon of Named Rock Units.
  3. ^ Struijk, A.P.; Green, R.T. (1991). Abbotts, I.L. (ed.). United Kingdom Oil and Gas Fields, 25 Years Commemorative Volume. Geological Society Memoir. Vol. 14. Geological Society. pp. 63–72. doi:10.1144/GSL.MEM.1991.014.01.0.