LUNDE FM
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Generell informasjon
Generell informasjon Attributt Verdi Litostrat. enhet Den litostratigrafiske enhetens offisielle navn.LUNDE FMNPDID for litostrat. enhet Sokkeldirektoratets entydige nøkkel for litostratigrafiske enheter.97Nivå 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
Lunde Formation
NameFrom the bird (English: puffin) of the same name.Well type sectionNorwegian well 33/12-2 (Mobil) from 2951 m to 4048 m, coord N 61°13'31.38", E 01°51'25.97", (Fig 3.4) .Well reference sectionThickness1079 m in the type well, 1052 m in the reference well.LithologyThe formation is an interbedded sequence of very fine to very coarse-grained sandstones (2 to 10 m thick), claystones, marls and shales.
The sandstones are mainly white, pink or grey and cemented to a variable degree with kaolinite, anhydrite and carbonate. Fine-grained sandstones from the upper portion of the formation (core data from UK well 211/13-1) display small scale ripple cross stratification, bioturbation and incorporated mud clasts and mud balls. This part of the formation may also have small fining upward sequences.
The interbedded argillaceous units are dominantly red-brown claystones, siltstones and shales with thin limestones (possibly caliche). Tuff horizons are present in the lower half of the formation in the Statfjord Field area. The lowermost part of the Lunde Formation consists in the Statfjord Field area (and westward into UK waters), of a sequence which is very uniform both in lithology and thickness. It is around 300 thick and consists mainly of brick red to red brown calcareous claystones grading to marls which are normally soft, silty and micaceous. This lower sequence is easily recognisable and may eventually be separated out and assigned formation status.BoundariesThe base of the formation is picked at the base of the first thick claystone unit. This boundary is marked by sonic and gamma ray log breaks. The alternating lithologies of the Lunde Formation result in an irregular gamma ray response. On structural highs the top of the formation is represented by a hiatus, with Jurassic or younger strata resting on the Triassic sequence. Where the Statfjord Formation is present, the upper boundary of the Lunde Formation is placed at the change to the relatively massive clean standstone of the overlying Statfjord Formation . In the Statfjord Field area, this transition often occurs via a coarsening upward unit, clearly defined on gamma ray and sonic logs. The base of this unit is the top of the Lunde Formation. (See also the description of the Statfjord Formation ).DistributionThe formation is assumed to be present throughout the northern North Sea Area, although major parts may be missing on structural highs owing to erosion or non-deposition.AgeLate Triassic, possibly Norian to early Rhaetian age.Depositional environmentThe Lunde Formation is dominantly of continental origin, deposited in lacustrine and fluvial environments.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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Brønnbaner som penetrerer
Brønnbaner som penetrerer 09.05.19824786483216.02.19813298330812.12.19955322558112.04.20093396380922.09.19793003317516.12.19823389347612.05.19903387347606.12.19913940398629.03.20122754396020.05.19844249430017.10.20093718376711.05.19862438261128.06.20213120328401.07.20081247130026.10.20191847201710.06.20152946311318.10.19792692322018.11.19814455452006.07.19793862390024.07.20124377444418.04.19742960306023.08.19742951374921.02.19762735374713.08.19813344374231.03.20183568368016.12.19792508283424.05.19802697359930.03.19824410446003.02.19832425314306.04.19843599391727.03.19862577315312.05.19872502295021.06.19942913311015.02.19972513344010.01.20104224432718.02.20102563276125.01.20102738306602.01.20114905501019.05.20154754482228.08.20024313436005.11.20124252433524.07.19842392290510.10.19842271247502.01.19852513341416.01.19852628311516.03.19853010314630.05.19852654353916.12.19852678352611.04.19862373276612.06.19862443324029.10.19862683300017.12.19872763278413.04.19882962299415.10.19902945298005.07.19942944297907.04.19913085311527.08.19923128317710.03.20092584270120.03.20092972302208.03.19863417361017.11.19863051324027.05.19923143356707.03.20033151357409.06.19912950394701.04.19913484354016.07.19925208546010.02.19935208546024.08.19923474362509.03.19933474362428.12.19923245353009.12.19933125347009.12.20013253334726.06.20094282444215.11.20153116343714.03.20144485458722.02.20196001606808.09.19782367246008.12.19783540372907.06.19792715280210.10.19872712279915.10.19792481260002.01.19802764278023.03.19802180225014.07.19832177224705.03.19812089215511.04.19834010404227.09.19834007403912.05.19863375378513.07.19873538375310.08.19873538374229.05.19953844394011.04.20014370495008.07.20014200486515.02.20053657464522.12.20043657464526.03.20177390781118.07.20024476454007.12.20103710374006.11.19872678353211.03.19913697372620.10.201227032783 -
Brønnbaner med kjerner
Brønnbaner med kjerner 16.02.1981912.04.20095511.05.19861310.06.20153018.10.19791013.08.19813916.12.19799003.02.198318206.04.19844827.03.19865412.05.198718315.02.199720818.02.20105425.01.20105202.01.20111124.07.198422302.01.19855230.05.19853916.12.198510311.04.1986512.06.198624308.03.1986927.05.19927909.06.199132716.07.1992824.08.19922209.12.19933215.11.20155312.05.198618913.07.19871606.11.198715111.03.19911420.10.20127