ROR FM
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General information
General information Attribute Value Lithostrat. unit The lithostratigraphic unit's official name.ROR FMNPDID lithostrat. unit Norwegian Offshore Directorate's unique id for lithostratigraphic units.135Level 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
Ror Formation
NameNorwegian word for rudder or helm. The previous informal unit was the Leka Formation (H1-3).Well type section6407/2-1 (Saga Petroleum), coordinates 64°58'04.97"N, 07°28'28.11"E, from 3176 m to 3072 m (Fig 4.13) . One core (14.5 m recovery), from the upper parts of the formation.Well reference section6507/10-1 (BP), coordinates 65°13'10.75"N, 07°14'00.47"E , from 3080.5 m to 2994 m (Fig 4.14) . One core covers the base and 3.5 m of the lower part of the unit.
6407/4-1 (Statoil), coordinates 64°35'45.36''N, 07°08'42.17"E, from 4272 m to 4106 m (Fig 4.12) . The section includes approximately 40 m of interbedded Tofte Formation.
6610/7-1 (Statoil), coordinates 66°17'32.82"N, 10°16'52.92"E, from 2745.1 m to 2679 m (Fig 4.15) . Two cores, 28 m recovery, cover both the middle and upper parts of the unit.Thickness104 m in the type well, from 66.5 m to 160.5m in the reference wells.LithologyDominant grey to dark grey mudstones contain interbedded silty and sandy coarsening upwards sequences, commonly a few metres thick. Such sequences become more frequent towards the top of the formation, giving the unit an overall coarsening upwards trend over most of Haltenbanken.Basal StratotypeThe base is defined by the abrupt transition from sandstones of the Tilje Formation into mudstone. The break is well defined in most Haltenbanken wells and is easily picked on the gamma log. Well correlation indicates an erosional contact, at least in parts of the area.
In the northwesternmost Haltenbanken wells (e.g. 6506/12-1 , (Fig 4.11) , the Tofte Formation rests directly on the Tilje Formation , with no fine-grained succession in between. The mudstones overlying the Tofte Formation there are equivalent to the upper part of the Ror Formation in its type area.Lateral extent and variationThe formation is present in all wells on Haltenbanken, where it varies from 70 m to 170 m thick generally thinning to the northeast. To the west it interfingers with sandstones of the Tofte Formation (Fig 4.12) , and the oldest part of the Ror Formation is often absent. The Ror Formation is also present in some Trænabanken wells (e.g. (Fig 4.15) , but has been removed by erosion over large areas of the Nordland Ridge.AgePliensbachian to Toarcian.Depositional environmentThe formation was deposited in open shelf environments, mainly below wave base. The coarsening upwards trend reflects ongoing shallowing and storm-generated sands are common in the unit's upper part. Sand input from the west indicates syn-sedimentary tectonic uplift along the western margins of the 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 28.12.20182109212628.12.20182184222728.12.20182281232509.04.19954708481709.04.19954860491007.01.19964706481507.01.19964858490827.03.19964756486827.03.19964928497803.03.20064750486103.03.20064922497215.04.19974837487729.09.19975043510829.09.19975207521023.02.19985577560007.11.19984718472506.07.20005092510423.05.20004719472626.12.19994701470815.01.20194700472714.08.19844012417722.11.19864128417822.11.19864203428526.10.19864131420229.12.19874224427229.12.19874299437201.06.19884012413915.11.20023889404119.09.20064179422819.09.20064262433310.08.20104041416605.04.20204256429305.04.20204335438631.08.20214585462431.08.20214638471530.04.20024443448730.04.20024580462801.05.20234427443301.05.20234577459001.05.20234606465330.12.19854416451930.12.19854556459231.01.20074390441731.01.20074450456109.07.20134035406409.07.20134075418830.10.20154254430630.10.20154339443005.01.20194842486916.11.20184792485316.11.20184880491111.04.19884493466708.04.20074383439908.04.20074468459302.06.20054634468102.06.20054721482601.07.20074856489401.07.20074932504229.09.20134743480529.09.20134840495418.02.19913722378718.02.19913822387115.05.19833907405016.01.19843813395021.05.20124024411924.01.20134195425006.08.19823072317631.07.19832602270923.01.19872581273902.09.20092926309613.05.20102942299308.05.20112755287505.09.20192178219005.09.20192223231415.11.19854106415015.11.19854209427204.09.20113340336704.09.20113436349826.10.19842091224416.02.19872639269116.02.19872698272713.12.19902881293327.12.19992558258127.12.19992628266127.12.19992672270905.02.20082270229405.02.20082355236505.02.20082373242227.05.20092893291127.05.20092990304607.04.19862773283930.04.19902714277318.05.19882867293728.03.19892896297315.02.19913207335516.12.20003558368420.09.20073466357614.09.20084563460614.09.20084616475205.11.20084662472105.11.20084730489616.10.20164333448320.09.20163738386027.05.19971805184216.06.20082118221721.05.20082422255013.06.20092458256613.06.20093004301426.05.20092488254920.10.20132831284220.10.20132872290209.12.20133124313809.12.20133172322412.05.20152540257512.05.20152600262910.12.20223256339207.09.19841783183907.09.19841900196802.02.19851802182928.07.19851797182110.09.19851767179413.03.19861775180030.05.19931775180425.05.19881926204322.09.19922006205306.07.19991744188314.02.20222239229819.06.19872868297423.06.19903479367907.12.20181884193718.10.19882015215707.12.20005095516515.09.20095358538528.04.20104471450528.04.20104572457827.08.20134386443113.07.20184420447127.04.20184662472031.03.19884363438731.03.19884445448526.10.19914421448626.10.19914551455306.06.19964726478210.11.19964399446310.11.19964526452822.08.19984896494522.08.19985078508027.07.20014709475227.07.20014818482116.07.20064798483903.09.20124970499403.09.20125085510417.04.20184517453628.10.20194357439328.10.20194399444306.02.19854107416417.07.19853997414713.08.19854116416827.03.19864138427402.08.19864410443602.08.19864493451512.08.19874556462912.08.19874675469330.08.19884065418610.09.19934533460110.09.19934660467226.06.19954723477726.06.19954814485811.12.19955416546811.12.19955524555207.09.19964901498007.09.19965026504201.02.19974901498001.02.19975026504201.09.20094990507201.09.20095145518106.08.20094991508206.08.20095167521816.03.19923720374614.09.20194150417014.07.20224748481226.10.19903723374326.10.19903763377627.04.19971210122525.03.19993478353816.06.19994110421630.04.20043856391908.05.20084063408008.05.20084095411323.06.20091319136022.07.20093639368716.08.20133333335715.08.20152260231228.02.20173396345111.08.20221988202819.05.20214423444619.05.20214453448503.05.19983517357723.09.19993717377215.04.20013632368703.06.20013847388314.02.20023774383124.06.20141356140016.07.19913853390401.12.19844478458610.06.19852217228518.09.19852434249913.01.19862540260406.03.19862424247402.08.19872497255829.10.19932563260414.08.19973558361526.09.20104378447802.05.20124410449918.12.20193090318709.12.19862324238709.09.19871890194520.09.19881402144616.03.19911900194309.10.19932147216531.01.20042900295720.04.20112125215123.04.20202007205331.10.19822994308110.02.20142750282310.12.19812410249830.05.19822040211715.08.19852536263022.06.19872866299228.10.19972624269508.07.20013160326103.07.20072519259418.04.20082730281216.02.20102195228526.10.19802213230324.11.19812007207613.09.19852098218629.08.19992503251912.09.20111716175210.10.19971722182321.12.19971722182325.10.20113753376026.12.20124113414126.12.20124164417213.10.20203809381129.05.19893164317729.01.19922659266807.08.20032504252913.06.20143761376329.08.19831605164203.10.20092006205407.07.19832467254619.06.19832679274603.02.201325262539 -
Wellbores with cores
Wellbores with cores 09.04.199513427.03.19965329.09.19976522.11.19862331.08.20212011.04.19881502.06.20052801.07.2007118.02.19911806.08.19821527.12.19992307.04.19865618.05.19882528.03.1989115.02.1991814.09.20082719.06.1987528.04.2010031.03.1988226.10.19912422.08.19981827.07.20012006.02.19854517.07.19855127.03.198610302.08.19862212.08.19871810.09.1993426.06.19951007.09.1996101.09.20093114.07.2022926.10.1990725.03.1999922.07.20091416.08.20132311.08.20224003.05.19984123.09.19995515.04.20015601.12.19841010.06.1985218.09.19853713.01.19866406.03.19864902.08.19872902.05.2012609.12.19863809.09.19872020.09.1988531.10.1982715.08.1985128.10.19972112.09.20113229.05.19891329.01.1992919.06.198327