KOLJE FM
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General information
General information Attribute Value Lithostrat. unit The lithostratigraphic unit's official name.KOLJE FMNPDID lithostrat. unit Norwegian Offshore Directorate's unique id for lithostratigraphic units.84Level 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
Kolje Formation
NameFrom the fish species Melanogrammus aeglefinus (haddock). The formation corresponds to T4-2 and T4-3, the Tamsøy and Anda formations of earlier informal terminology.Well type sectionWell 7119/12-1 (Statoil), coordinates 71°06'08.00"N, 19°47'40.29"E, from 2441 m to 2004 m (Fig 4.52) .Well reference sectionWell 7120/12-1 (Norsk Hydro), coordinates 71°06'48.7"N, 20°45'20.1"E, from 1375 m to 1272 m (Fig .53) .Thickness437 m in the type well and 103 m in the reference well.LithologyDark brown to dark grey shale and claystone dominate, with minor interbeds of pale limestone and dolomite. The upper part of the formation also has thin interbeds of light grey-brown siltstone and sandstone. The reference well displays similar lithologies.Basal StratotypeThe base is marked by gradually decreasing gamma ray, decreasing interval transit time and increasing density log responses in the type well. However, in the central part of the Hammerfest Basin the density log response shows a decreasing trend at the formation base. A marker in the middle part of the formation (boundary between unit T4-2 and T4-3 of earlier informal terminology) shows an increase in density in parts of the Hammerfest Basin. An increasing gamma log response is associated with this log break westwards. The log breaks at the base and in the middle parts of the formation are thought to reflect condensed intervals providing important regional seismic markers.Lateral extent and variationThe formation thickens westwards but thins towards the central part of the Hammerfest Basin. There are no marked regional variations in lithology.AgeAn early Barremian to late Barremian/early Aptian age is suggested.Depositional environmentThe formation was deposited in distal open marine conditions, with good water circulation, but also with periodic restricted environments.CorrelationThe formation is a lateral equivalent of the Helvetiafjellet Formation, a distinctive sand-dominated unit on the Svalbard Platform.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 27.11.202056563525.09.19842550264810.10.19802004244126.06.1981990108712.09.19832715295317.02.20111636195528.03.19891826187823.03.19911948212009.07.20111702193206.06.19852170220502.05.19851843217622.07.20071954235130.11.20121996266508.10.19821746224821.08.19831666198709.06.19842570267910.09.19811650194229.07.19821552186924.05.19831962205510.12.20071798214226.09.19821607176120.10.19841847187108.09.19841210135305.09.19901442192212.10.19801272137511.09.19811309145505.05.19831422177803.01.20111399182802.03.20192149273327.10.19841817213614.04.19851885222628.09.19851930223606.07.19861820207909.03.20011625179005.08.19841588173212.08.19861578172815.07.20171584176629.11.20111545180911.11.19921764183213.01.19921887211211.11.19871649188419.09.20061623187510.10.20211583176708.01.200686596025.11.200686597623.12.200696199813.01.200796199814.05.20081638194321.04.20081638194320.10.19871220123312.10.20111154116630.12.19881314131807.03.200773377901.12.200881284408.01.201633556126.12.19922080249430.09.20132531272302.07.20171730202728.02.20171673169930.11.20171608161617.01.20181980212825.02.20142171218508.07.20131252125426.10.20181364137724.01.20121710173205.05.20141402141714.03.20211578170702.05.20111227124516.10.20121456148417.07.201756458928.08.201756458907.10.201750271522.03.20172155255001.10.201886097022.10.19881145189203.09.1987852135201.07.202084887028.11.198889298611.08.201866179718.06.201469473721.11.201861075231.07.201967570203.11.201367268806.07.201459161014.04.201659060717.09.201356358016.05.201558360217.09.201756758721.07.201467476103.08.2017650680 -
Wellbores with cores
Wellbores with cores 11.11.19922528.02.20170