TUBÅEN FM
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General information
General information Attribute Value Lithostrat. unit The lithostratigraphic unit's official name.TUBÅEN FMNPDID lithostrat. unit Norwegian Offshore Directorate's unique id for lithostratigraphic units.174Level 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
Level below Lithostrat. unit -
Description
Tubåen Formation
NameFrom a fishing bank off the northern point of Sørøy (Finnmark). The present formational concept corresponds to T2-3 or the Dyrøy Formation of earlier informal usage.Well type sectionWell 7121/5-1 (Statoil), coordinates 71°35'54.88"N, 21°24'21.78"E from 2572 to 2507m. The entire upper part of the formation (from 2542 m) is cored in this well (Fig 4.46) .Well reference sectionWell 7120/12-1 (Norsk Hydro), coordinates 71°06'48.7"N, 20°45'20.1"E, from 2337 to 2250 m (Fig 4.47) .ThicknessThe formation is relatively thin in its type and reference well's (65 m and 87 m respectively).LithologyThe formation is dominated by sandstones with subordinate shales and minor coals. Coals are most abundant near southeastern basinal margins, and die out to the northwest. The formation generally has a tripartite development, with a lower and upper sand-rich unit separated by a more shaly interval. Shale content increases towards the northwest where the Tubåen Formation may intercalate with a lateral shale equivalent.DefinitionThe base is taken on gamma ray logs at the first significant sand with blocky to bell-shaped response patterns above the more irregular high responses of the underlying unit. There is also a marked change in the separation pattern between the neutron porosity and bulk density logs.Lateral extent and variationGreatest thicknesses, in the order of 150 m, are seen in the Askeladden area (blocks 7120/7 and 8), and isopachs appear to follow a WSW-ENE trend. The formation is expected to have a distribution subparallel to the Troms-Finnmark Fault Complex. It appears to shale out towards the northwest.AgeThe formation base is of late Rhaetian to early Hettangian age; the unit may locally extend upwards into the Sinemurian.Depositional environmentThe unit's sands are thought to represent a stacked series of high energy marginal marine (tidal inlet dominated barrier complex and/or estuarine) deposits. Marine shales reflect more distal environments to the northwest, while coals and shales to the south-east were deposited in protected back-barrier lagoonal environments.Source-
Dalland, A., Worsley, D. and Ofstad, K. (eds.) 1988: A lithostratigraphic scheme for the Mesozoic and Cenozoic succession offshore mid- and northern Norway. NPD-Bulletin No. 4, 65 pp.
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Wellbores penetrating
Wellbores penetrating 03.12.20002862300325.09.19843027318526.06.19811719185517.02.20112660280828.03.19892452250609.07.20112299236306.06.19852510264802.05.19852559282022.07.20072762288608.10.19822650283921.08.19832387243510.09.19812330246229.07.19822375245510.12.20072496264326.09.19821986207720.10.19842156229008.09.19841796191412.10.19802250233711.09.19812152223405.05.19832342239503.01.20112365240727.10.19842469253214.04.19852642273728.09.19852507257206.07.19862450250309.03.20011984203405.08.19842001204512.08.19862028207315.07.20172025203913.01.19922430246411.11.19872052206319.09.20062104211310.10.20211908192105.10.20001102112519.10.20011078119608.01.20061087118013.01.20071200121826.12.20181166127414.05.20082131214121.04.20082122213920.10.19871285130530.09.20133143328325.02.19882206230529.07.2020938106919.01.20171503165328.02.20171747190707.11.20171843200017.01.20182578265110.10.2014992111325.02.20142405251324.03.20121578169508.07.20131763178026.10.20181626169224.01.20122023213016.12.20131119119005.05.20141710185814.03.20212061211202.05.20111511162822.05.202286899707.06.20221166128816.10.20121832193114.01.200952454021.08.20081004106419.06.198893093119.07.200890195011.04.19881202123410.11.20141636167524.03.20061190120122.02.20061190120126.04.2012974103420.12.19891345140402.02.20011399149410.02.20011399149408.01.20011397148007.10.2017980107915.06.201964466501.09.2017657682 -
Wellbores with cores
Wellbores with cores 02.05.1985628.09.19852909.03.20012611.11.19871110.10.20211219.10.20017708.01.20062920.10.19871419.01.201714828.02.20176825.02.20145624.03.20124524.01.20129916.12.20136022.05.20228421.08.20083419.06.1988119.07.20084511.04.19883120.12.1989407.10.201737