MAUREEN FM
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Generell informasjon
Generell informasjon Attributt Verdi Litostrat. enhet Den litostratigrafiske enhetens offisielle navn.MAUREEN FMNPDID for litostrat. enhet Sokkeldirektoratets entydige nøkkel for litostratigrafiske enheter.102Nivå 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
Maureen Formation
NameNamed by Deegan & Scull (1977) from the Maureen Field in UK block 16/29.Well type sectionUK well 21/10-1 from 2524 m to 2464 m, coordinates N 57°43'50.37", E 00°58'29.19" (Fig 5.44) . No cores.Well reference sectionsUK well 16/29-4 from 2796 m to 2679 m, coordinates N 58°05'20.90", E 01°39'15.10" (Fig 5.45) . No cores.
Norwegian well 7/11-1 from 3173 m to 3069 m, coordinates N 57°04'15.60", E 02°26'24.40" (Fig 5.46) . No cores.ThicknessThe Maureen Formation is thickest in the Witch Ground Graben in the UK sector of the central North Sea where it consists of as much as 400 m of mainly sandstones. It thins westwards and southwards, and is poorly developed in Norwegian waters, the maximum thickness in a well is found 7/11-1 where there are 104 m of sandstones and carbonates.LithologyThe Maureen Formation consists of sandstones that are slightly to very calcareous and often contain reworked limestones. The sandstones are interbedded with brown and dark grey shales, and are fine to medium grained, locally very coarse.
The type well established by Deegan & Scull (1977) represents a distal and somewhat atypical section. A more representative well from the Maureen Formation sandstones is UK well 16/29-4 (Fig 5.45) .
The formation pinches out distally and is replaced by the light grey marls and shales of the Våle Formation .Basal stratotypeCharacteristics of the upper boundaryThe upper boundary is defined by the change from sandstones containing reworked limestone fragments and limestone beds, to the shales of the Lista Formation . The boundary is characterised by an upward increasing gamma-ray response (Fig 5.45) . and an overall decreasing velocity. Where the Andrew Formation rests on the Maureen Formation the transition is seen as an increase in gamma-ray readings and decrease in velocity (Fig 5.44) .DistributionThe coarse detrital facies of the Maureen Formation is developed in the central North Sea, in what is in general a lobe-shaped deposit trending from the East Shetland Platform southeast along the Central Trough. The formation thins towards the east and west, and grades into the Våle Formation . The Maureen Formation is not well developed in the Norwegian sector. Its approximate distribution on the Norwegian continental shelf is shown in (Fig 5.47) .AgeEarly Paleocene.Depositional environmentThe Maureen Formation was deposited in an open marine environment dominated by sand influx from the northwest, together with local erosion of Danian and Cretaceous rocks.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.
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Brønnbaner som penetrerer
Brønnbaner som penetrerer 04.06.19893335340702.02.20063368341822.07.20103449347315.04.19743033306930.09.19783021308126.02.19782692274403.07.19822781281511.05.19832947296507.06.19882777282624.07.19842613271905.11.19883090310730.07.19702932295027.04.19893021304607.12.19723066309206.09.19863056307520.06.19812545255831.08.19812775281223.01.19902819284803.03.20133302335328.04.20132945296905.02.19692602266912.12.19832831285820.02.19853099312515.06.19683069317314.10.19683175322007.02.19693286333331.07.19693167318310.06.19823104323120.10.19823151322525.12.19833377339008.10.19843377339009.03.19863094316210.09.19903271344010.06.20073253340803.06.19772730279106.09.19772762282612.12.19772704273707.06.19812866291226.07.19882791285823.12.19882929294025.07.19771585160509.12.200561962407.01.19822727282529.04.19812703277914.07.19812392242527.02.19822625272306.09.19752634264304.05.19862418243919.05.19972813282531.03.20062435244730.03.19822423243509.10.197398799129.01.19832270228119.07.19852157216121.04.198723022317 -
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