SPEKK FM
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General information
General information Attribute Value Lithostrat. unit The lithostratigraphic unit's official name.SPEKK FMNPDID lithostrat. unit Norwegian Offshore Directorate's unique id for lithostratigraphic units.155Level 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
Spekk Formation
NameThe Norwegian word for blubber. The unit corresponds to the informal Nesna Formation (H2-2).Well type section6407/2-1 (Saga Petroleum), coordinates 64°58'04.97"N, 07°28'28.11"E, from 2908 m to 2842.5 m (Fig 4.24) .Well reference section6407/9-1 (Shell), coordinates 64°21'55,39"N, 07°47'21.76"E, from 1673 m to 1612 m (Fig 4.22) . This section includes 49 m of the Rogn Formation . The lowermost part, including the base is cored, but the atypical development of the succession in the Draugen Field makes this well unsuitable as type section.Thickness65.5 m in the type well, 14 m in the reference well.LithologyThe formation consists of dark brown to dark grey shale. The shale is predominantly non-calcareous. Parts of the unit may be silty. The organic content (mainly of type II kerogen) is very high.Basal StratotypeThe formation has a characteristic high gamma log response and the sonic log shows high interval transit times. The base is defined by a sharp increase in the gamma ray response and a drop in sonic log readings. High velocity limestone stringers close to the base of the formation may complicate the basal pick on the sonic log.Lateral extent and variationThe formation was probably deposited throughout the Haltenbanken-Trænabanken area, but may now be absent from the Nordland Ridge and other structural highs. Unusually thick sections may be present in structural lows.AgeOxfordian to Ryazanian.Depositional environmentThe unit's shales were deposited in marine anoxic bottom water conditions.CorrelationThe Spekk Formation has a higher, more uniform gamma ray response than the partially time equivalent Draupne Formation in the northern North Sea. The two formations are lithologically similar with dark claystones and high organic contents. The Spekk Formation is time equivalent to the Hekkingen Formation in the Hammerfest Basin.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 30.11.19904394444630.11.19904466448530.11.19904494477730.11.19904846495530.11.19905046522030.11.19905236526417.12.19932966296712.07.20221648165005.07.19941137115905.07.19941252126718.01.202281081728.12.20181845187216.10.20231900192509.04.19954371438107.01.19964369437927.03.19964375438903.03.20064369438305.04.19974388440615.02.19994388440607.11.19984432443306.07.20004747474923.05.20004433443405.05.20154299430815.01.20194419443514.08.19843662368522.11.19863841386726.10.19863800384329.12.19873908394901.06.19883732376515.11.20023577359419.09.20063895390010.08.20103783379505.04.20204032404431.08.20214339436030.04.20024072407730.12.19854005405031.01.20074051406809.07.20133732375330.10.20153971398005.01.20194169420016.11.20184169420002.06.20054254426901.07.20074325439529.09.20134200421828.02.19913625372717.10.19953711379017.10.19953873390722.07.20144041405322.07.20144114412411.06.20143726372811.06.20143748376117.09.20153495352217.08.20153753394612.11.20153741374412.11.20153769381124.10.20203859386115.05.19833526357516.01.19843521354523.08.19963571359521.05.20123737375824.01.20133717379228.10.20203301332906.08.19822843290831.07.19832410241723.01.19872393239931.08.20092819285802.09.20092733274513.05.20102909291708.05.20112538262205.09.20191958200015.11.19853710377213.04.20113795387404.03.19883873412004.09.20113054310926.10.19841834184316.02.19872445245113.12.19902536263027.12.19992359237705.02.20082101211027.05.20092685274727.05.20092766277707.04.19862696270621.01.19872637265230.04.19902639265418.05.19882795280728.03.19892844285515.02.19913120315416.12.20003338335120.09.20073329333414.09.20084120418405.11.20084118418816.10.20163850388420.09.20163443345807.06.19924094430625.11.19941710172827.05.19971639166621.05.20082178218421.05.20082187219813.06.20092100218026.05.20092100218020.10.20132754276009.12.20132820282812.05.20152412241710.12.20222915292407.09.19841591162107.09.19841670167302.02.19851620165028.07.19851593163028.07.19851668168510.09.19851637165813.11.19851619165413.11.19851705173313.03.19861611164330.05.19931611164325.05.19881692171422.09.19921606169906.07.19991691170023.06.20031608163508.11.20191622166308.11.20191701170414.02.20221990208719.06.19872573257923.06.19902821283027.06.19921806182719.01.20162379239018.09.20152518258807.12.20181743177115.07.19991625165915.07.19991721173102.06.20101630172718.10.19881702179707.12.20004353445815.09.20094575465028.04.20104138415827.08.20134025403213.07.20184149415327.04.20184387438931.03.19883844386226.10.19914162416502.10.19924167416906.06.19964428443410.11.19964139414427.07.20014576457816.07.20064599460003.09.20124549456017.04.20184223422506.02.19853836385217.07.19853709372113.08.19853855386327.03.19863780382702.08.19864021405012.08.19874042411430.08.19883743378710.09.19934169419726.06.19954229429311.12.19954901496607.09.19964577459001.02.19974577459001.09.20094408445706.08.20094408445729.09.19863610361505.05.19943843397214.09.20193705372514.07.20223883399026.10.19903088312225.03.19993013309306.05.19993098315816.06.19993098315830.04.20043161318508.05.20083566357022.07.20093344336315.12.20092534258516.08.20132842300228.02.20172891300403.05.19983178319423.09.19993222325003.06.20013474349114.02.20023339337227.09.20191972197716.07.19913174327624.11.20081339137101.12.19843680378506.03.19862310231629.10.19932439247114.08.19973327334812.08.19993911397626.09.20103767379002.05.20123854386616.03.19911787179009.10.19931974203331.01.20042649275031.10.19822781283510.02.20142615261730.05.19821898190815.08.19852358237322.06.19872530253528.10.19972434244508.07.20012885298303.07.20072373239118.04.20082535254316.02.20102041205101.07.20152604271326.10.19802032205224.11.19811872187813.09.19851937193913.09.19992573273829.08.19992130214724.05.19871580165010.10.19971292131921.12.19971292131925.10.20113258327213.10.20203387341629.05.19892920292829.05.19892934293729.01.19922347236511.03.19932407241317.08.19952407241306.03.19942328237212.04.20022222222426.04.20022323234518.02.20032047205507.08.20032365237615.08.20063107315321.12.20082674267725.01.20092768277701.04.20102375238113.06.20143531353431.01.20173311332317.08.20183418344605.08.20191498154503.10.20091850186907.07.19832069222611.12.19933534361407.10.19963536361619.06.19832271231503.02.201322642292 -
Wellbores with cores
Wellbores with cores 30.11.19901117.12.1993128.02.19911317.10.19952722.07.20141011.06.20141517.08.2015404.03.1988927.05.20091207.09.1984302.02.1985228.07.19851422.09.19927007.12.20181818.10.1988112.08.1987106.03.1986729.10.19935