EGERSUND FM
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General information
General information Attribute Value Lithostrat. unit The lithostratigraphic unit's official name.EGERSUND FMNPDID lithostrat. unit Norwegian Offshore Directorate's unique id for lithostratigraphic units.30Level Indicates the lithostratigraphic unit's level. Legal values: GROUP, FORMATION, MEMBER.FORMATIONLithostrat. unit, parent The parent lithostratigraphic unit's official name. See also level. Will be empty if Level = GROUP. -
Level below
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Description
Egersund Formation
NameNamed by Deegan and Scull (1977) who gave the unit member status.Well type sectionWell reference sectionThickness37 m in the type well and 75 m in the reference well.LithologyIn the type well the formation consists of dark grey micromicaceous shales and siltstones with brownish, locally oolitic, microcrystalline carbonate beds and occasionally sandstone streaks. The latter become more important east and north-east of the type well.BoundariesThe lower boundary is also the junction of the Boknfjord Group with the Vestland Group and is described above. At the base of the formation a more radioactive part is recognizable in several wells. The upper boundary is marked by the appearance of the dark grey to black organic-rich shales of the overlying Tau Formation . The shales of the Tau Formation have a high radioactivity and a low velocity, and therefore the upper boundary is marked by strong log breaks.DistributionThe formation is distributed throughout Fiskebank and Egersund Sub-Basins.AgeCallovian to Kimmeridgian.Depositional environmentThe Egersund Formation was deposited in an open marine, generally low energy basinal environment.Source-
Vollset, J. and Doré, A. G. (eds.) 1984: A revised Triassic and Jurassic lithostratigraphic nomenclature for the Norwegian North Sea. NPD-Bulletin No. 3, 53 pp.
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Wellbores penetrating
Wellbores penetrating 10.10.19661890204004.12.19822290237528.03.20132314233921.11.20112332239228.04.19873097316221.09.19873062312308.02.19903188325211.04.19943993409421.07.19953078314615.10.19964714478310.06.19973784385402.02.19985769582302.02.19987420758417.09.19993669384429.03.20102574262914.10.20192932299113.08.19964560463104.09.19861749178809.12.20052607266019.05.19682251228829.08.19702435249019.08.19722437249020.08.19772668271801.08.20062654270329.06.19681825192219.08.19712005204012.07.20152245227417.01.19711464149412.09.20071141127620.08.19952339238807.02.20112542263023.10.20212417243523.10.19732205222011.06.19742205222024.03.19692675268230.06.19682195221117.05.19762513252121.06.19722215229003.02.19802288237010.07.20092198227715.08.20092438260626.08.20092377253601.01.19802319240531.03.197418001878 -
Wellbores with cores