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Factpages Norwegian Offshore Directorate
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11.12.2024 - 01:27
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MIME FM

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  • General information

    General information
    Attribute Value
    Lithostrat. unit
    The lithostratigraphic unit's official name.
    MIME FM
    NPDID lithostrat. unit
    Norwegian Offshore Directorate's unique id for lithostratigraphic units.
    106
    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

    Mime Formation

    Name
    Named after a god from Norse mythology who was considered to be very wise.
    Well type section
    Norwegian well 34/10-18 from 2351 m to 2340 m, coordinates N 61°14'22.48", E 02°03'18.83" (Fig 5.16) . Cores (lower half of the formation).
    Well reference section
    Norwegian well 17/4-1 from 2122 m to 2080 m, coordinates N 58°35'54.00", E 03°16'05.00" (Fig 5.17) . No cores.
    Thickness
    In the type well the Mime Formation is 11 m, and in the reference well it is 42 m thick. Usually, the thickness varies between 5 and 20 m.
    Lithology
    The formation is dominated by limestones and marls. It often contains impure carbonates that are reworked and mixed with smaller quantities of sand and silt. The formation is sometimes chalky. The matrix is usually very calcareous. Oolites are observed in some wells in the East Shetland Basin. The colour is usually white or light pink, but may vary slightly on account of the sand/silt mixture.
    Basal stratotype
    In those wells where the Mime Formation is present it defines the lower boundary of the Lower Cretaceous, lying on the Upper Jurassic sediments or older rocks. This boundary is always an unconformity and can most often be seen on the logs as a decrease in gamma-ray readings and an increase in velocity upwards from the underlying Jurassic sediments.
    Characteristics of the upper boundary
    The upper boundary is usually defined at the bottom of more or less calcareous shales in the Åsgard Formation . This boundary is reflected on the logs as an upward increase in gamma-ray readings and a reduction in velocity (Fig 5.17) . The upper boundary can also be defined by the overlying shales of the Sola or Rødby formations. The boundary will normally be reflected on logs as described above (Fig 5.16) .
    Distribution
    The formation is found only as narrow zones along structural highs. On the flanks of the Viking Graben it may be seen almost continuously from approximately 58° to 62° N. It is also found as a thin carpet over most of the East Shetland Basin and along the Fladen Ground Spur, the Utsira High-Lomre Terrace, the northwest side of the Sele High, and the Jæren High.
    The formation is not encountered in the more central parts of the basins, and it is doubtful if it is present along the boundaries of the Fennoscandian Shield.
    Age
    The formation is time-transgressive, and is dated to Late Valanginian to Albian. It is oldest in the deeper parts along the basin margins and becomes younger up along the flanks. In most of the East Shetland Basin, along the Utsira, Bergen, Sele and Jæren highs, and along the flanks of the Viking Graben, it is usually of Barremian/Hauterivian age (Fig 5.4) .
    Depositional environment
    Palaeontological investigations together with the observation of oolites indicate a transgressive, shallow marine, depositional environment.
    Remarks
    Hesjedal & Hamar (1983) described the impure, reworked limestones resting directly on the Base Cretaceous unconformity over the structural highs, as the Utvik Formation. This formation is formally defined as the Mime Formation in this paper, since the name suggested was not in accordance with existing recommendations.
    Source
    • Isaksen, D. and Tonstad, K. (eds.) 1989: A revised Cretaceous and Tertiary lithostratigraphic nomenclature for the Norwegian North Sea. NPD-Bulletin No. 5, 59 pp.
  • Wellbores penetrating

    Wellbores penetrating
    Wellbore name
    Wellbore completion date
    Top depth [m]
    Bottom depth [m]
    22.12.1980
    2977
    2998
    13.05.2009
    1880
    1884
    26.08.1968
    2080
    2122
    13.09.2001
    3709
    3711
    03.02.1986
    2222
    2234
    29.05.1992
    2261
    2278
    28.01.1997
    2376
    2379
    03.08.2003
    2153
    2163
    12.07.2020
    4096
    4110
    05.01.1998
    3189
    3192
    09.05.1991
    2545
    2560
    04.06.1991
    2676
    2691
    11.07.2002
    2680
    2695
    11.10.1991
    2931
    2943
    17.07.2002
    2935
    2947
    14.05.1993
    2965
    2968
    08.08.1994
    2648
    2652
    11.04.1995
    2586
    2595
    26.02.2016
    2878
    2883
    30.04.1984
    1533
    1541
    26.12.2014
    3935
    3952
    10.06.2015
    2935
    2946
    02.01.1997
    3455
    3466
    24.07.2012
    4080
    4084
    16.10.2021
    3273
    3294
    31.08.1976
    2922
    2939
    08.06.1992
    2737
    2742
    20.01.1993
    2680
    2683
    20.12.1994
    2841
    2846
    24.01.1995
    3190
    3200
    09.08.1996
    2825
    2840
    23.07.1996
    2678
    2689
    09.09.2006
    5169
    5211
    30.04.2009
    5617
    5662
    11.06.2009
    5617
    5662
    19.03.2009
    5702
    5728
    17.09.2017
    2660
    2669
    23.10.2014
    2933
    2944
    08.05.1981
    3375
    3378
    31.03.2018
    3396
    3407
    30.10.2008
    3776
    3782
    10.09.2008
    3769
    3777
    30.12.2009
    3679
    3688
    03.01.2012
    4726
    4743
    19.11.2011
    3739
    3748
    13.02.2015
    3981
    3984
    16.04.2015
    3715
    3719
    16.12.1979
    2494
    2508
    27.03.1986
    2565
    2577
    12.05.1987
    2495
    2502
    15.02.1997
    2495
    2513
    18.04.2000
    3782
    3790
    18.02.2010
    2561
    2563
    25.01.2010
    2737
    2738
    19.05.2015
    4250
    4265
    12.08.2020
    3524
    3532
    15.07.2020
    3373
    3378
    31.03.2021
    3386
    3398
    06.03.2022
    2809
    2818
    10.04.2010
    4070
    4082
    13.03.2010
    3544
    3553
    04.07.2018
    3472
    3481
    08.06.2021
    3396
    3406
    24.07.1984
    2387
    2392
    02.01.1985
    2357
    2363
    16.01.1985
    2504
    2517
    16.03.1985
    2489
    2496
    11.04.1986
    2276
    2278
    17.12.1987
    2160
    2161
    13.04.1988
    2485
    2493
    02.12.1989
    2178
    2182
    03.09.1990
    3397
    3440
    13.08.1990
    2386
    2390
    15.10.1990
    2387
    2391
    05.07.1994
    2386
    2390
    07.04.1991
    2448
    2451
    04.05.1991
    2487
    2495
    17.09.1991
    2283
    2284
    27.12.1991
    2437
    2442
    12.07.1994
    2444
    2449
    27.08.1992
    2572
    2578
    11.12.1992
    2502
    2508
    12.02.1993
    2851
    2870
    01.10.1993
    2176
    2179
    20.05.1994
    3196
    3203
    24.03.1995
    2922
    2928
    14.09.1996
    2785
    2791
    26.02.1998
    4123
    4129
    02.02.1998
    4512
    4528
    02.03.1998
    2658
    2666
    14.04.1998
    2701
    2706
    17.03.1999
    2700
    2705
    02.12.1999
    2395
    2399
    13.04.2001
    2460
    2470
    25.04.2001
    2820
    2830
    25.04.2001
    3386
    3393
    27.10.2001
    2527
    2535
    17.09.2014
    3380
    3396
    02.12.2020
    2644
    2655
    13.07.2020
    4355
    4366
    03.11.1991
    3468
    3477
    15.11.2015
    3109
    3116
    30.08.1983
    2340
    2351
    15.12.1988
    3014
    3028
    03.02.1989
    3030
    3034
    10.07.1989
    3008
    3012
    01.08.1989
    3008
    3012
    27.04.1990
    3008
    3012
    03.04.1995
    2576
    2587
    26.01.2017
    6525
    6538
    18.07.2002
    3736
    3742
    19.12.2010
    3618
    3624
    16.01.1992
    3085
    3098
    09.09.1989
    2803
    2821
    03.11.1991
    2621
    2658
    14.05.2000
    2798
    2808
    14.05.2000
    2878
    2891
  • Wellbores with cores

    Wellbores with cores
    Wellbore name
    Wellbore completion date
    Core length [m]
    10.06.2015
    3
    08.06.1992
    5
    20.01.1993
    2
    23.10.2014
    6
    27.03.1986
    1
    13.08.1990
    1
    27.12.1991
    3
    27.08.1992
    2
    12.02.1993
    20
    20.05.1994
    4
    26.02.1998
    6
    02.02.1998
    9
    14.04.1998
    5
    30.08.1983
    7