Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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04.11.2024 - 01:25
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KROSSFJORD FM

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  • General information

    General information
    Attribute Value
    Lithostrat. unit
    The lithostratigraphic unit's official name.
    KROSSFJORD FM
    NPDID lithostrat. unit
    Norwegian Offshore Directorate's unique id for lithostratigraphic units.
    87
    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

    Krossfjord Formation

    Name
    After a fjord on the west coast of Norway, adjacent to the type area in Quadrant 31.
    Well type section
    Norwegian well 31/2-1 (Shell) from 1741.5 m to 1880 m, coord N 60°46'19.16", E 03°33'15.87", (Fig 3.21) .
    Well reference section
    None at present.
    Lithology
    The formation consists of sandstones, light grey-brown in colour, medium to coarse grained, well sorted, and loose to very friable. Occasionally calcite cemented streaks occur. The lower portion of the Krossfjord Formation is slightly argillaceous and carbonaceous with minor shale intercalations.
    Boundaries
    In the type well the formation overlies the lower part of the Heather Formation . It has a "blocky" log character and is the first continuous thick sandstone unit above the Brent Group . The base of the formation is shown by the underlying reduction in gamma-ray intensity and FDC-CNL separation. The top is characterized by the change to the serrate gamma ray log motif of the overlying Fensfjord Formation and an overall upward increase in gamma ray intensity.
    Distribution
    The formation has only been clearly recognized in the Troll Field area.
    Age
    Bathonian.
    Depositonal environment
    The formation was deposited in a coastal shallow marine environment.
    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]
    21.08.2009
    2678
    2717
    09.11.1979
    1742
    1880
    09.11.1981
    1743
    1881
    23.04.1980
    1848
    1857
    06.10.1980
    1848
    1961
    20.07.1980
    1677
    1755
    06.04.1981
    1625
    1710
    12.11.1982
    1625
    1710
    21.12.1980
    1789
    1860
    20.07.1981
    1782
    1853
    22.04.1984
    1782
    1853
    18.08.1982
    2254
    2266
    17.10.1992
    1916
    2005
    08.12.2002
    3148
    3252
    13.10.1983
    1668
    1779
    30.04.1984
    1851
    1929
    18.11.1984
    2077
    2134
    05.01.2014
    1996
    2010
    13.12.1995
    2270
    2278
    12.09.2000
    2522
    2538
    11.11.1983
    1826
    1908
    30.08.1984
    1826
    1908
    09.06.1984
    1848
    1905
    11.02.1993
    1855
    1930
    27.07.2002
    1862
    1937
    25.07.2000
    2056
    2112
    06.03.2020
    2278
    2382
    28.10.1983
    1720
    1776
    11.12.1983
    1875
    1910
    08.09.1984
    1875
    1910
    26.12.1983
    1756
    1932
    21.05.1984
    1937
    1972
    29.07.1984
    1947
    1976
    25.05.1985
    1927
    1965
    22.09.1985
    1927
    1965
    24.07.2011
    2498
    2629
    28.06.2021
    2678
    2721
    01.07.2008
    1115
    1187
    04.12.1996
    1598
    1645
    26.10.2019
    1551
    1645
    07.05.1989
    2099
    2140
    27.07.1989
    2099
    2140
    03.04.1991
    2481
    2512
    07.02.2010
    3376
    3531
    18.11.2013
    2848
    2943
    06.08.1984
    2233
    2469
    15.07.2009
    2232
    2237
    16.02.2011
    2594
    2716
    19.06.2015
    3230
    3289
    30.01.2022
    3097
    3130
    07.05.1996
    2510
    2560
  • Wellbores with cores

    Wellbores with cores
    Wellbore name
    Wellbore completion date
    Core length [m]
    06.04.1981
    37
    11.02.1993
    33
    07.05.1989
    35
    03.04.1991
    29