NORDMELA FM
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General information
General information Attribute Value Lithostrat. unit The lithostratigraphic unit's official name.NORDMELA FMNPDID lithostrat. unit Norwegian Offshore Directorate's unique id for lithostratigraphic units.118Level 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
Nordmela Formation
NameNordmela is a small community on the west coast of Andøya. Our use of the term corresponds to the description by Olaussen et al. (1984) and to the informal term T2-4.Well type sectionWell 7121/5-1 (Statoil), coordinates 71°35'54.88"N, 21°24'21.78"E, from 2507 to 2445m. The entire formation is cored in this well (Fig 4.48) .Well reference sectionWell 7119/12-2 (Statoil), coordinates 71°00'51.81"N, 19°58'20.81"E, from 1719 m to 1517 m. All but the basal 31 m are cored in this well (Fig 4.49) .Thickness62 m in the type well and 202 m in the reference well.LithologyThe formation consists of interbedded siltstones, sandstones, shales and claystones with minor coals. Sandstones become more common towards the top.Basal StratotypeThe base is defined by a sharp increase in gamma ray response to high, irregular, patterns in contrast to the cylindrical, blocky to bell-shaped pattern of the underlying unit. This shift is accompanied by an increase in bulk density readings.Lateral extent and variationThickness variation between the type and reference wells clearly illustrates a southwest thickening wedge. This is in marked contrast to the underlying Tubåen Formation . Westwards thickening may be the result of early Kimmerian subsidence over the site of the Ringvassøy-Loppa Fault Complex.AgeThe formation extends from the Sinemurian to the late Pliensbachian in the reference area. Its top may be diachronous, younging eastwards into the Toarcian in the type section.Depositional environmentThe formation was deposited in tidal flat to flood plain environments. Individual sandstone sequences represent estuarine and tidal channels which dissected this low-lying area.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 Wellbore nameWellbore completion dateTop depth [m]Bottom depth [m]03.12.20002610286225.09.19842868302726.06.19811517171912.09.19833299331417.02.20112448266028.03.19892365245209.07.20112221229906.06.19852427251002.05.19852470255922.07.20072678276230.11.20122979303008.10.19822522265021.08.19832256238709.06.19842969306210.09.19812190233029.07.19822190237524.05.19832277233510.12.20072360249626.09.19821896198620.10.19842048215608.09.19841655179612.10.19802152225011.09.19811978215205.05.19832220234203.01.20112230236527.10.19842396246914.04.19852557264228.09.19852445250706.07.19862400245009.03.20011928198405.08.19841908200112.08.19861938202815.07.20171939202513.01.19922386243011.11.19872038205219.09.20062088210410.10.20211905190821.04.20082111212207.03.200787288209.02.201970972007.04.201975977930.09.20132985314325.02.19882062220628.02.20171699174730.11.20171813190307.11.20171553184317.01.20182348257810.10.201487399218.06.202478285325.02.20142293240524.03.20121415157808.07.20131606176326.10.20181479162624.01.20121857202305.05.20141526171014.03.20211890206102.05.20111354151122.05.202282886807.06.20221013116616.10.20121645183214.01.200950852404.03.201670370519.06.198891993010.11.20141553163624.03.20061166119022.02.20061166119026.04.201296797420.12.19891300134502.02.20011379139910.02.20011379139908.01.20011378139707.05.19901083114015.12.19931278132322.03.20173448353501.10.20181355136922.10.19882022203903.09.19871455146701.07.20201657166528.11.19881417142403.11.201379679914.04.2016867114408.04.202475277117.09.201367973007.08.201470471215.06.201958064401.09.2017583657 -
Wellbores with cores
Wellbores with cores Wellbore nameWellbore completion dateCore length [m]26.06.198117302.05.19858622.07.2007410.09.19818029.07.19822826.09.19826611.09.19817227.10.19842014.04.19854128.09.19856205.08.19842712.08.1986215.07.20174513.01.19922411.11.19871410.10.2021309.02.2019830.09.20136525.02.19885228.02.20174707.11.20175010.10.20146025.02.201411124.03.201216226.10.20181724.01.201216505.05.20147214.03.20219602.05.20115007.06.20222819.06.19881008.01.20011707.05.19904803.09.19871217.09.20133107.08.2014801.09.201745