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

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  • General information

    General information
    Attribute Value
    Lithostrat. unit
    The lithostratigraphic unit's official name.
    HIDRA FM
    NPDID lithostrat. unit
    Norwegian Offshore Directorate's unique id for lithostratigraphic units.
    65
    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

    Hidra Formation

    Name
    Named by Deegan & Scull (1977) after the Hidra High in Norwegian blocks 1/3 and 2/1. The name Hidra is after the island of Hidra on the southern coast of Norway.
    Well type section
    Norwegian well 1/3-1 from 4441 m to 4371 m, coordinates N 56°51'21.00", E 02°51'05.00" (Fig 5.24) . No cores.
    Well reference sections
    UK well 22/1-2A from 3783 m to 3738 m, coordinates N 57°56'12.20", E 01°02'55.80" (Fig 5.25) . No cores. UK well 29/25-1 from 2258.5 m to 2228 m, coordinates N 56°18'10.00", E 01°51'48.80" (Fig 5.26) . No cores. Danish well BO-1 from 2275.5 m to 2220 m, coordinates N 55°48'8.22", E 04°34'18.66" (Fig 5.27) . Cored through the upper 35 m.
    Thickness
    The formation is 70 m thick in the type well, 45 m in 22/1-2 A, 30.5 m in 29/25-1 and 55.5 m in BO-1. Seismic interpretation suggests that the formation reaches a maximum thickness of about 150 m in the northwestern part of the Central Trough in the Norwegian sector.
    Lithology
    In the type well the formation consists of white to light grey, hard chalks with thin interbeds of grey to black shale in the lower part of the formation. Locally the formation is more marly with interbedded marly chalk and marl. The chalks are occasionally softer with abundant glauconite and pyrite. The colour may be white, grey, green, brown or pink. At the base of the formation in UK well 22/1-2 A, hard, black, carbonaceous and argillaceous limestones are present. Traces of pink waxy tuff occur in places. The formation is generally highly bioturbated.
    Basal stratotype
    The formation usually shows a gamma-ray response that has constant low values and high velocities. These contrast sharply at the lower boundary with the higher gamma-ray response and lower velocity of the Åsgard and Sola formations. The lower boundary is more gradational when the carbonate-rich facies of the Rødby Formation is present beneath the Hidra Formation.
    Characteristics of the upper boundary
    The upper boundary is defined by the stratotype of the Blodøks Formation . The boundary is characterised by a change from the chalk lithology to mainly mudstone. This is seen as an abrupt change to higher gamma-ray response and a decrease in velocity in the Blodøks Formation . The boundary shows as a glauconitised hardground in the core from Danish well BO-1.
    Distribution
    The formation is found in the central and southern North Sea. In the Norwegian sector, it is missing above highs such as the Sørvestlandet, Mandal, Jæren, Utsira and Sele highs, the Grensen Ridge, as well as many of the salt diapirs.
    Age
    Cenomanian.
    Depositional environment
    Open marine with a perioditic or turbiditic origin for the sediments.
    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]
    11.11.1968
    4371
    4441
    27.07.1969
    4060
    4131
    11.02.1985
    4568
    4580
    27.05.1997
    4402
    4456
    31.07.1998
    3898
    3900
    22.07.2010
    5082
    5188
    16.09.2016
    5239
    5385
    12.07.1992
    4162
    4291
    17.02.1977
    3662
    3703
    17.05.1987
    3659
    3704
    30.09.1978
    3683
    3790
    12.01.1978
    3494
    3646
    26.04.1991
    3494
    3646
    02.08.2003
    3705
    3789
    29.03.1980
    3524
    3534
    03.08.1982
    3723
    3741
    05.04.1983
    3758
    3768
    12.08.1984
    3806
    3825
    06.03.1985
    3786
    3802
    23.11.1985
    3621
    3630
    06.07.1991
    3783
    3800
    08.03.1992
    3799
    3819
    14.01.1992
    3822
    3852
    07.05.1997
    4055
    4097
    07.03.2009
    4065
    4115
    28.02.2009
    5729
    5739
    08.11.2019
    3841
    3853
    29.03.1972
    3460
    3484
    09.04.1974
    3764
    3787
    31.01.1989
    4561
    4634
    06.04.1990
    4573
    4646
    14.04.1990
    4561
    4634
    16.03.1990
    4817
    4890
    27.10.2003
    4817
    4890
    04.11.1991
    4598
    4638
    15.07.1992
    4598
    4638
    10.07.1994
    4445
    4464
    14.03.2008
    4692
    4745
    24.05.2012
    4520
    4540
    24.07.2012
    4520
    4540
    05.09.2015
    4824
    4847
    22.11.1970
    3594
    3635
    18.01.1992
    4081
    4083
    21.01.2009
    4276
    4320
    11.12.1970
    3303
    3423
    02.03.1971
    3745
    3752
    29.03.1973
    2967
    3018
    10.04.1974
    3898
    3962
    21.04.1979
    3182
    3274
    02.06.1980
    3372
    3419
    12.07.1980
    3975
    4271
    02.02.1981
    4081
    4212
    14.03.1990
    4078
    4209
    25.06.1988
    3906
    3965
    01.11.1991
    3903
    3962
    09.01.1990
    4165
    4202
    14.10.1991
    4172
    4209
    15.10.1990
    3992
    4086
    21.11.1990
    4150
    4213
    13.04.1991
    2970
    2994
    31.03.1991
    4512
    4538
    13.09.1991
    3989
    4057
    17.06.1992
    4170
    4238
    07.08.1992
    3096
    3176
    06.01.1994
    4107
    4225
    09.06.1999
    4087
    4204
    03.09.1972
    3169
    3192
    07.06.1973
    2778
    2780
    30.06.1975
    2606
    2627
    15.03.1976
    2603
    2619
    27.06.1976
    2640
    2658
    29.08.1976
    2639
    2653
    11.10.1976
    2615
    2624
    27.04.1989
    3235
    3257
    22.01.1991
    2847
    2874
    13.07.2012
    2841
    2852
    23.04.1976
    4058
    4091
    25.04.1993
    3566
    3709
    03.10.1969
    2863
    2887
    18.05.1978
    2815
    2840
    06.09.1986
    3591
    3620
    11.07.1991
    3869
    3950
    23.12.1993
    3661
    3734
    27.07.2015
    3395
    3410
    12.02.2019
    2946
    2956
    12.03.1987
    3709
    3917
    14.09.1990
    4187
    4215
    28.06.1978
    2647
    2683
    20.08.1978
    3013
    3062
    29.12.2010
    3114
    3130
    21.08.1993
    2827
    2840
    03.06.2013
    2678
    2692
    05.02.1969
    3095
    3135
    12.12.1983
    3367
    3393
    20.02.1985
    3705
    3728
    03.06.2006
    3576
    3593
    15.06.1968
    3703
    3740
    10.06.1982
    3865
    3928
    20.10.1982
    3821
    3895
    25.12.1983
    4208
    4318
    08.10.1984
    4208
    4318
    12.12.1983
    3655
    3676
    09.03.1986
    3874
    3899
    10.09.1990
    4148
    4198
    10.06.2007
    4072
    4145
    31.12.2011
    4762
    4995
    16.07.2011
    4660
    4807
    03.11.2012
    3632
    3641
    07.06.1981
    3323
    3332
    24.07.1981
    3085
    3092
    29.08.1991
    3283
    3284
    29.08.1991
    3284
    3286
    01.07.1969
    2570
    2580
    17.03.1980
    2510
    2513
    29.06.1975
    2512
    2528
    23.07.1971
    2300
    2340
    29.08.1970
    1950
    1952
    19.08.1972
    1958
    1967
    20.08.1977
    1840
    1853
    06.05.1969
    1530
    1550
    26.06.1976
    1040
    1046
    17.01.1971
    1157
    1183
    24.02.1982
    3551
    3668
    09.08.2018
    3438
    3540
    03.03.2020
    3464
    3529
    20.01.2020
    3353
    3428
    08.04.1978
    3299
    3363
    16.12.1978
    3588
    3647
    07.12.1980
    3419
    3510
    13.03.2011
    3718
    3802
    19.12.2010
    3502
    3549
    15.05.2015
    3330
    3360
    03.06.2015
    3563
    3603
    29.06.2015
    3536
    3565
    26.12.2017
    4271
    4370
    21.10.2011
    3432
    3558
    17.06.1978
    3263
    3303
    14.06.1979
    3162
    3192
    11.04.1980
    3253
    3298
    07.09.1980
    3350
    3392
    29.04.1981
    3222
    3266
    25.05.1981
    3166
    3197
    14.07.1981
    2590
    2597
    23.12.1981
    2700
    2705
    27.02.1982
    3246
    3295
    03.01.2010
    2858
    2889
    09.02.2001
    2675
    2711
    31.03.2006
    2683
    2693
    23.03.2007
    3039
    3047
    04.02.2007
    3039
    3047
    07.11.2007
    3058
    3138
    21.05.2009
    2784
    2836
    21.06.2009
    2889
    2970
    16.05.2010
    2643
    2676
    29.05.2010
    2846
    2907
    18.07.2010
    4168
    4270
    13.05.2021
    2458
    2545
    27.11.2012
    2689
    2709
    26.08.1968
    1438
    1444
    17.05.1976
    1700
    1787
    19.07.1986
    3217
    3522
    04.07.1970
    1923
    1936
    25.12.1991
    1904
    1926
    17.02.2013
    1961
    2020
  • Wellbores with cores

    Wellbores with cores
    Wellbore name
    Wellbore completion date
    Core length [m]