Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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06.10.2024 - 01:28
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SANDNES FM

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  • General information

    General information
    Attribute Value
    Lithostrat. unit
    The lithostratigraphic unit's official name.
    SANDNES FM
    NPDID lithostrat. unit
    Norwegian Offshore Directorate's unique id for lithostratigraphic units.
    139
    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

    Sandnes Formation

    Name
    From a town on the south-west coast of Norway. This formation was formerly included in the Haldager Formation.
    Well type section
    Norwegian well 9/4-3 (Conoco) from 2490 m to 2507.5 m, coord N 57°36'54.5", E 04° 18'57.7" (Fig 3.29) .
    Well reference section
    Norwegian well 18/11-1 (Elf) from 1878 m to 1964 m, coord N 58°04'21.3", E 04°32'00.1'' (Fig 3.31) .
    Thickness
    17.5 m in the type well and 86 m in the reference well.
    Lithology
    In the type well the Sandnes Formation consists of a massive white, very fine to coarse grained glauconitic sandstone. It is firm to friable, poorly sorted and slightly silty. In other wells (e.g. 18/11-1 ) the formation comprises inter-bedded sandstones and shales. The shales are generally dark grey to brown, micaceous and occasionally carbonaceous.
    Boundaries
    The base of the Sandnes Formation is usually an unconformable contact with the non-marine Bryne Formation or older Jurassic or Triassic rocks. Generally it is defined at the base of the massive and clean sand, usually well marked on both gamma ray and sonic logs. In the type well the lower boundary is picked at the top of the first coal bed of the underlying Bryne Formation . In wells where the Sandnes Formation is more argillaceous it can be harder to distinguish between the Sandnes and Bryne Formation on log characteristics alone. In such cases the occurrence of deltaic/non-marine palynofloras would serve to define this boundary (e.g. 18/11-1 ). The upper contact with the overlying silts and shales of the Boknfjord Group is marked by good gamma ray and sonic log breaks.
    Distribution
    The Sandnes Formation is developed in the Fiskebank Sub-Basin and in the Egersund Sub-Basin. It is broadly homotaxial with the Hugin Formation in the southern Viking Graben and the Flyvbjerg Member of the Haldager Formation in the Danish Sub-basin.
    In the transition between the Southern Vest-land Arch and the Fiskebank Sub-Basin it can be difficult to distinguish between the
    Ula Formation and the Sandnes Formation. In such cases detailed paleontology is required to decide the ages of the sands, and hence their lithostratigraphic relationships.
    Age
    Callovian.
    Depositional environment
    The Sandnes 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]
    05.09.2013
    3431
    3450
    23.01.1990
    3411
    3474
    07.02.1992
    3379
    3436
    03.03.2013
    3892
    3949
    28.04.2013
    3524
    3563
    14.09.2015
    3356
    3430
    10.06.1969
    2655
    2696
    05.02.1969
    3219
    3230
    07.02.1972
    2606
    2666
    10.10.1966
    2040
    2113
    28.03.2013
    2339
    2371
    10.02.1976
    2156
    2168
    01.07.1969
    2793
    2833
    17.03.1980
    2667
    2752
    06.10.2010
    3099
    3158
    29.06.1975
    2835
    2871
    23.07.1971
    2663
    2711
    21.11.2011
    2392
    2411
    28.04.1987
    3162
    3309
    21.09.1987
    3123
    3230
    08.02.1990
    3252
    3373
    11.04.1994
    4094
    4295
    21.07.1995
    3146
    3263
    15.10.1996
    4783
    4940
    10.06.1997
    3854
    3994
    02.02.1998
    5823
    5955
    02.02.1998
    7378
    7420
    17.09.1999
    3844
    4365
    29.03.2010
    2629
    2761
    14.10.2019
    2991
    3123
    13.08.1996
    4631
    4768
    04.09.1986
    1788
    1843
    09.12.2005
    2660
    2778
    19.05.1968
    2288
    2319
    29.08.1970
    2490
    2540
    19.08.1972
    2490
    2508
    20.08.1977
    2718
    2814
    01.08.2006
    2703
    2783
    29.06.1968
    1922
    2109
    06.05.1969
    2038
    2050
    12.07.2015
    2274
    2311
    26.06.1976
    1472
    1490
    30.07.1992
    1539
    1632
    12.09.2007
    1276
    1322
    20.05.2015
    2985
    3097
    31.10.1967
    2165
    2236
    23.07.1973
    2202
    2269
    20.08.1995
    2388
    2410
    07.02.2011
    2630
    2647
    23.10.2021
    2435
    2443
    23.10.1973
    2220
    2237
    11.06.1974
    2220
    2237
    21.06.1972
    2290
    2306
    09.10.1973
    2157
    2179
    03.02.1980
    2370
    2396
    10.07.2009
    2277
    2298
    26.08.2009
    2536
    2595
    01.01.1980
    2405
    2421
    31.03.1974
    1878
    1964
  • Wellbores with cores

    Wellbores with cores
    Wellbore name
    Wellbore completion date
    Core length [m]
    23.01.1990
    57
    07.02.1992
    9
    03.03.2013
    57
    10.10.1966
    5
    23.07.1971
    2
    28.04.1987
    98
    21.09.1987
    28
    08.02.1990
    28
    11.04.1994
    17
    21.07.1995
    38
    15.10.1996
    50
    10.06.1997
    54
    02.02.1998
    84
    17.09.1999
    16
    04.09.1986
    7
    29.06.1968
    7
    30.07.1992
    4
    20.08.1995
    21
    10.07.2009
    21
    01.01.1980
    0