Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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11.12.2024 - 01:27
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JOHANSEN FM

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  • General information

    General information
    Attribute Value
    Lithostrat. unit
    The lithostratigraphic unit's official name.
    JOHANSEN FM
    NPDID lithostrat. unit
    Norwegian Offshore Directorate's unique id for lithostratigraphic units.
    73
    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

    Johansen Formation

    Name
    Named after Hjalmar Johansen, member of the Amundsen South Pole expedition.
    Well type section
    Norwegian well 31/2-1 (Shell) from 2176 m to 2272.5 m, coord N 60°46'19.16'', E 03°33'15.87" (Fig 3.13) .
    Well reference section
    None at present.
    Thickness
    95.5 m in the type well.
    Lithology
    In the type well the formation consists of a sequence of sandstones with thin calcite cemented streaks throughout. The lower part is medium to fine-grained, micaceous, well sorted sandstone which grades downwards into light grey silty micaceous claystone. The main section of the formation is composed of medium grained, friable sandstones, with well sorted quartz grains which are angular to subrounded. The uppermost part is composed of medium to fine grained, micaceous sandstones, which are moderately sorted, silty and argillaceous.
    Boundaries
    In the type well area the Johansen Formation splits the Amundsen Formation . It is distinguished by a low response, crescentic gamma ray profile.
    Distribution
    The formation is restricted to an area extending from the eastern part of the Horda Platform northwards to the Måløy Fault Blocks.
    Age
    Sinemurian to Pliensbachian.
    Depositional environment
    The formation was probably deposited on a high energy, shallow marine shelf.
    Source
    • Vollset, J. and Doré, A. G. (eds.) 1984: A revised Triassic and Jurassic lithostratigraphic nomenclature for the Norwegian North Sea. NPD-Bulletin No. 3, 53 pp.
  • Wellbores penetrating

    Wellbores penetrating
    Wellbore name
    Wellbore completion date
    Top depth [m]
    Bottom depth [m]
    15.02.2008
    2787
    2882
    09.11.1979
    2176
    2273
    09.11.1981
    2177
    2274
    06.10.1980
    2233
    2344
    20.07.1980
    2097
    2176
    06.04.1981
    2126
    2241
    12.11.1982
    2126
    2241
    21.12.1980
    2308
    2387
    20.07.1981
    2301
    2380
    22.04.1984
    2301
    2380
    18.08.1982
    2967
    3035
    13.10.1983
    2001
    2088
    18.11.1984
    2306
    2432
    11.05.1980
    2543
    2702
    11.11.1983
    2225
    2323
    30.08.1984
    2225
    2323
    06.03.2020
    2702
    2818
    28.10.1983
    1981
    2083
    08.09.1984
    2055
    2138
    26.12.1983
    2042
    2125
    29.07.1984
    2122
    2193
    22.06.2016
    2756
    2780
    28.06.2021
    2929
    2998
    04.12.1996
    1785
    1791
    26.10.2019
    1746
    1797
    18.07.2002
    4124
    4180
    21.05.2014
    3753
    3782
    15.04.2014
    3752
    3782
    16.01.1992
    3665
    3806
    06.08.1984
    2764
    2995
    04.12.1987
    3730
    3775
    09.09.1989
    3794
    3895
    29.12.1990
    3023
    3082
    27.01.1992
    3033
    3092
    03.11.1991
    3570
    3628
    20.04.1992
    3887
    3924
    29.09.1992
    2791
    2840
    16.12.2015
    3943
    3953
    02.02.2019
    3657
    3676
  • Wellbores with cores

    Wellbores with cores
    Wellbore name
    Wellbore completion date
    Core length [m]
    20.07.1980
    18
    11.05.1980
    17
    06.03.2020
    69