VIDAR FM
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Generell informasjon
Generell informasjon Attributt Verdi Litostrat. enhet Den litostratigrafiske enhetens offisielle navn.VIDAR FMNPDID for litostrat. enhet Sokkeldirektoratets entydige nøkkel for litostratigrafiske enheter.187Nivå Angir den litostratigrafiske enhetens nivå. Lovlige verdier: GROUP, FORMATION, MEMBER.FORMATIONLitostrat. enhet, forelder Den litostratigrafiske enhetens offisielle navn, refererer til forelder. Se også nivå. Vil være tom hvis Nivå = GROUP. -
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Beskrivelse
Vidar Formation 1)
NameVidar was a son of the Norse god Odin.Well type sectionNorwegian well 2/1-4 from 3138 m to 3075 m, coordinates N 56°54'39.82", E 03°04'02.25" (Fig 5.50) . No cores.Well reference sectionNorwegian well 1/3-1 from 3147 m to 3095 m, coordinates N 56° 51'21.00", E 02°51'05.00" (Fig 5.41) . No cores.ThicknessThe Vidar Formation is 63 m thick in the type well and 52 m thick in the reference well.LithologyHomogenous limestone is the dominant lithology, but streaks of skeletal detritus and clasts of sandstone occur.Basal stratotypeThe lower boundary represents a sharp transition from the claystones of the Lista Formation or the marl of the Våle Formation to the overlying limestones of the Vidar Formation. This is marked by a distinct decrease in gamma-ray readings and an increase in velocity (Fig 5.41 , 5.50)Characteristics of the upper boundaryThe upper boundary represents a transition to the claystones of the Lista Formation , characterized by a dramatic increase in gamma-ray readings and a decrease in velocity (Fig 5.41 , 5.50).DistributionThe Vidar Formation is present in the Central Trough (Fig 5.47) . A similar limestone is found in well 16/1-1 . This might be an equivalent to the Vidar Formation.AgeEarly Paleocene.Depositional environmentPresence of reworked Upper and Lower Cretaceous material indicates that the Vidar Formation represents reworked chalk from the Shetland Group chalk facies as well as reworked marls and claystones from the Cromer Knoll Group . Mass flows from each side of the Central Trough are the most probable transport mechanism for this reworked material.Source-
Isaksen, D. and Tonstad, K. (eds.) 1989: A revised Cretaceous and Tertiary lithostratigraphic nomenclature for the Norwegian North Sea. NPD-Bulletin No. 5, 59 pp.
Footnotes-
1) The Vidar Formation has been better defined by Fritsen and Riis (unpublished).
References-
Fritsen, A. and Riis, F. (unpublished): A revised chalk lithostratigraphic nomenclature.
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Brønnbaner som penetrerer
Brønnbaner som penetrerer 11.11.19683095314724.03.19833059314808.05.19832676268811.02.19853153320627.05.19973202327831.07.19983254325922.07.20103296333912.07.19923168323714.11.19723039310403.08.19823075313605.04.19833002310112.08.19843128317306.03.19853102315723.11.19853065309706.07.19913055314308.03.19923055314307.05.19973177325210.02.19992813290307.03.20093151325428.02.20094640487705.09.20132851293113.07.20132890298808.11.20193070315913.08.19692290229731.05.19703005302309.10.19733092311820.12.19733111315009.04.19743060309431.01.19893217326206.04.19903229327414.04.19903217326216.03.19903456349727.10.20033456349704.11.19913238325415.07.19923238325429.02.19923118316510.07.19943277331122.02.20153147326705.09.20153368340522.02.20023087309131.10.20213175322723.09.19762628270224.07.19812661270229.08.19912861291706.11.19912953296217.03.19964020412618.05.20123233328606.10.20102527255018.12.20112475249527.10.20112469248624.05.20141856186004.03.20141819194916.07.20141529154304.01.201924862518 -
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