NORDMELA FM

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• General information

  General information

  Attribute	Value
  Lithostrat. unit The lithostratigraphic unit's official name.	NORDMELA FM
  NPDID lithostrat. unit Norwegian Offshore Directorate's unique id for lithostratigraphic units.	118
  Level Indicates the lithostratigraphic unit's level. Legal values: GROUP, FORMATION, MEMBER.	FORMATION
  Lithostrat. unit, parent The parent lithostratigraphic unit's official name. See also level. Will be empty if Level = GROUP.	REALGRUNNEN SUBGP

• Level below

  Level below

  Lithostrat. unit

• Description

  Nordmela Formation
  
  Name

  Nordmela is a small community on the west coast of Andøya. Our use of the term corresponds to the description by Olaussen et al. (1984) and to the informal term T2-4.

  Well type section

  Well 7121/5-1 (Statoil), coordinates 71°35'54.88"N, 21°24'21.78"E, from 2507 to 2445m. The entire formation is cored in this well (Fig 4.48) .

  Well reference section

  Well 7119/12-2 (Statoil), coordinates 71°00'51.81"N, 19°58'20.81"E, from 1719 m to 1517 m. All but the basal 31 m are cored in this well (Fig 4.49) .

  Thickness

  62 m in the type well and 202 m in the reference well.

  Lithology

  The formation consists of interbedded siltstones, sandstones, shales and claystones with minor coals. Sandstones become more common towards the top.

  Basal Stratotype

  The base is defined by a sharp increase in gamma ray response to high, irregular, patterns in contrast to the cylindrical, blocky to bell-shaped pattern of the underlying unit. This shift is accompanied by an increase in bulk density readings.

  Lateral extent and variation

  Thickness variation between the type and reference wells clearly illustrates a southwest thickening wedge. This is in marked contrast to the underlying Tubåen Formation . Westwards thickening may be the result of early Kimmerian subsidence over the site of the Ringvassøy-Loppa Fault Complex.

  Age

  The formation extends from the Sinemurian to the late Pliensbachian in the reference area. Its top may be diachronous, younging eastwards into the Toarcian in the type section.

  Depositional environment

  The formation was deposited in tidal flat to flood plain environments. Individual sandstone sequences represent estuarine and tidal channels which dissected this low-lying area.

  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.

• Wellbores penetrating

  Wellbores penetrating

  Wellbore name	Wellbore completion date	Top depth [m]	Bottom depth [m]
  7019/1-1	03.12.2000	2610	2862
  7119/9-1	25.09.1984	2868	3027
  7119/12-2	26.06.1981	1517	1719
  7119/12-3	12.09.1983	3299	3314
  7119/12-4	17.02.2011	2448	2660
  7120/1-2	28.03.1989	2365	2452
  7120/2-3 S	09.07.2011	2221	2299
  7120/5-1	06.06.1985	2427	2510
  7120/6-1	02.05.1985	2470	2559
  7120/6-2 S	22.07.2007	2678	2762
  7120/6-3 S	30.11.2012	2979	3030
  7120/7-1	08.10.1982	2522	2650
  7120/7-2	21.08.1983	2256	2387
  7120/7-3	09.06.1984	2969	3062
  7120/8-1	10.09.1981	2190	2330
  7120/8-2	29.07.1982	2190	2375
  7120/8-3	24.05.1983	2277	2335
  7120/8-4	10.12.2007	2360	2496
  7120/9-1	26.09.1982	1896	1986
  7120/9-2	20.10.1984	2048	2156
  7120/10-1	08.09.1984	1655	1796
  7120/12-1	12.10.1980	2152	2250
  7120/12-2	11.09.1981	1978	2152
  7120/12-3	05.05.1983	2220	2342
  7120/12-5	03.01.2011	2230	2365
  7121/4-1	27.10.1984	2396	2469
  7121/4-2	14.04.1985	2557	2642
  7121/5-1	28.09.1985	2445	2507
  7121/5-2	06.07.1986	2400	2450
  7121/5-3	09.03.2001	1928	1984
  7121/7-1	05.08.1984	1908	2001
  7121/7-2	12.08.1986	1938	2028
  7121/8-1	15.07.2017	1939	2025
  7122/4-1	13.01.1992	2386	2430
  7122/6-1	11.11.1987	2038	2052
  7122/6-2	19.09.2006	2088	2104
  7122/6-3 S	10.10.2021	1905	1908
  7123/4-1 S	21.04.2008	2111	2122
  7125/4-1	07.03.2007	872	882
  7132/2-1	09.02.2019	709	720
  7132/2-2	07.04.2019	759	779
  7219/8-2	30.09.2013	2985	3143
  7219/9-1	25.02.1988	2062	2206
  7219/12-1 A	28.02.2017	1699	1747
  7219/12-2 A	30.11.2017	1813	1903
  7219/12-2 S	07.11.2017	1553	1843
  7219/12-3 S	17.01.2018	2348	2578
  7220/2-1	10.10.2014	873	992
  7220/4-1	25.02.2014	2293	2405
  7220/5-1	24.03.2012	1415	1578
  7220/5-2	08.07.2013	1606	1763
  7220/5-3	26.10.2018	1479	1626
  7220/7-1	24.01.2012	1857	2023
  7220/7-3 S	05.05.2014	1526	1710
  7220/7-4	14.03.2021	1890	2061
  7220/8-1	02.05.2011	1354	1511
  7220/8-2 S	22.05.2022	828	868
  7220/8-3	07.06.2022	1013	1166
  7220/10-1	16.10.2012	1645	1832
  7223/5-1	14.01.2009	508	524
  7224/2-1	04.03.2016	703	705
  7224/7-1	19.06.1988	919	930
  7227/10-1	10.11.2014	1553	1636
  7227/11-1 A	24.03.2006	1166	1190
  7227/11-1 S	22.02.2006	1166	1190
  7228/1-1	26.04.2012	967	974
  7228/2-1 S	20.12.1989	1300	1345
  7228/7-1 A	02.02.2001	1379	1399
  7228/7-1 B	10.02.2001	1379	1399
  7228/7-1 S	08.01.2001	1378	1397
  7228/9-1 S	07.05.1990	1083	1140
  7229/11-1	15.12.1993	1278	1323
  7318/12-2	22.03.2017	3448	3535
  7321/4-1	01.10.2018	1355	1369
  7321/7-1	22.10.1988	2022	2039
  7321/8-1	03.09.1987	1455	1467
  7321/8-2 S	01.07.2020	1657	1665
  7321/9-1	28.11.1988	1417	1424
  7324/7-1 S	03.11.2013	796	799
  7324/7-3 S	14.04.2016	867	1144
  7324/8-1	17.09.2013	679	730
  7324/9-1	07.08.2014	704	712
  7335/3-1	15.06.2019	580	644
  7435/12-1	01.09.2017	583	657

• Wellbores with cores

  Wellbores with cores

  Wellbore name	Wellbore completion date	Core length [m]
  7119/12-2	26.06.1981	173
  7120/6-1	02.05.1985	86
  7120/6-2 S	22.07.2007	4
  7120/8-1	10.09.1981	80
  7120/8-2	29.07.1982	28
  7120/9-1	26.09.1982	66
  7120/12-2	11.09.1981	72
  7121/4-1	27.10.1984	20
  7121/4-2	14.04.1985	41
  7121/5-1	28.09.1985	62
  7121/7-1	05.08.1984	27
  7121/7-2	12.08.1986	2
  7121/8-1	15.07.2017	45
  7122/4-1	13.01.1992	24
  7122/6-1	11.11.1987	14
  7122/6-3 S	10.10.2021	3
  7132/2-1	09.02.2019	8
  7219/8-2	30.09.2013	65
  7219/9-1	25.02.1988	52
  7219/12-1 A	28.02.2017	47
  7219/12-2 S	07.11.2017	50
  7220/2-1	10.10.2014	60
  7220/4-1	25.02.2014	111
  7220/5-1	24.03.2012	162
  7220/5-3	26.10.2018	17
  7220/7-1	24.01.2012	165
  7220/7-3 S	05.05.2014	72
  7220/7-4	14.03.2021	96
  7220/8-1	02.05.2011	50
  7220/8-3	07.06.2022	28
  7224/7-1	19.06.1988	10
  7228/7-1 S	08.01.2001	17
  7228/9-1 S	07.05.1990	48
  7321/8-1	03.09.1987	12
  7324/8-1	17.09.2013	31
  7324/9-1	07.08.2014	8
  7435/12-1	01.09.2017	45