Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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23.12.2024 - 01:26
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HAVERT FM

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  • General information

    General information
    Attribute Value
    Lithostrat. unit
    The lithostratigraphic unit's official name.
    HAVERT FM
    NPDID lithostrat. unit
    Norwegian Offshore Directorate's unique id for lithostratigraphic units.
    58
    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.
  • Level below

    Level below
    Lithostrat. unit
  • Description

    Havert Formation

    Name
    From the seal species Halichoerus grypus: The unit corresponds to unit T1-1 or the Svolvær Formation of earlier informal usage.
    Well type section
    Well 7120/12-2 (Norsk Hydro), coordinates 70°7'30.03"N, 20°48'19.00"E, from 3657 m to 3552 m (Fig 4.42) .
    Well reference section
    Well 7120/9-2 (Norsk Hydro), coordinates 71°29'40.81"N, 20°42'05.38"E, from 4956 m to 4806 m (Fig 4.43) .
    Thickness
    105 m in the type well and 150 m in the reference well.
    Lithology
    In the type well the formation consists of medium to dark grey shales with minor inter-bedded pale grey siltstones and sandstones comprising two generally coarsening upwards sequences. The reference section further north in the Hammerfest Basin shows a more monotonous silty shale sequence with only a very weak upwards coarsening trend.
    Basal Stratotype
    The base is defined by increasing gamma ray and decreasing density responses above underlying mixed clastic and carbonate sequences. In the reference well the base is also easily recognised as basal silty shales directly overlie a 6 m thick limestone bed.
    Lateral extent and variation
    Present information suggests a fining trend from the southern margins of the Hammerfest Basin northwards. Thicknesses are moderate and show no marked trends.
    Age
    Palynomorphs suggest a Griesbachian to Dienerian age.
    Depositional environment
    The formation was deposited in marginal marine to open marine settings with coastal environments to the south and southeast.
    Correlation
    Palynofloras and sequence development show similarities to the Vardebukta Formation of western Spitsbergen.
    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]
    15.11.1985
    2373
    2403
    26.12.1985
    2373
    2403
    21.07.1986
    2373
    2403
    20.10.1984
    4806
    4956
    11.09.1981
    3552
    3657
    16.04.1984
    992
    1366
    23.08.1986
    2786
    2993
    08.01.2006
    2212
    2595
    25.11.2006
    2217
    2550
    20.10.1987
    2671
    3475
    12.10.2011
    2606
    2814
    26.02.1994
    1008
    1569
    08.11.1991
    1002
    1623
    08.01.2016
    1302
    1895
    07.04.2019
    1895
    3405
    17.07.2017
    1886
    1903
    28.08.2017
    2218
    2227
    01.12.2020
    1459
    1564
    02.08.2016
    2075
    2195
    10.03.2008
    2674
    2895
    04.03.2016
    2735
    2944
    19.06.1988
    2663
    3067
    25.09.2011
    2555
    3666
    19.07.2008
    2930
    2992
    11.04.1988
    2913
    3877
    20.12.1989
    3984
    4300
    07.05.1990
    2638
    3884
    15.12.1993
    2804
    3879
    19.07.2021
    1729
    3711
    28.05.2021
    2447
    2519
    19.08.1989
    2512
    2919
    21.07.2014
    2758
    2865
    15.06.2019
    3060
    4300
  • Wellbores with cores

    Wellbores with cores
    Wellbore name
    Wellbore completion date
    Core length [m]
    08.01.2006
    2
    25.09.2011
    27
    11.04.1988
    35
    20.12.1989
    9
    07.05.1990
    17
    19.08.1989
    19