HARDRÅDE FM

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• General information

  General information

  Attribute	Value
  Lithostrat. unit The lithostratigraphic unit's official name.	HARDRÅDE FM
  NPDID lithostrat. unit Norwegian Offshore Directorate's unique id for lithostratigraphic units.	56
  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.	SHETLAND GP

• Level below

  Level below

  Lithostrat. unit

• Description

  Hardråde Formation
  
  Name

  Named after Harald "Hardråde" Sigurdsson, a Norwegian king (A.D. 1046-1066).

  Well type section

  Norwegian well 30/11-3 from 2892 m to 2601 m, coordinates N 60°02'38.59", E 02°32'15.47" (Fig 5.36) . No cores.

  Well reference section

  Norwegian well 31/6-2 from 978 m to 968 m, coordinates N 60°34'58.24", E 03°54'55.76" (Fig 5.37) . No cores.

  Thickness

  The formation is 291 m thick in the type well ( 30/11-3 ) and 10 m in well 31/6-2 . It is absent on tilted fault blocks in the Troll area (e.g. well 31/2-9 ).

  Lithology

  The formation consists generally of interbedded limestones and mudstones, except in the Troll area where it is thin and consists of a single limestone bed. The limestones are white or pale, moderately hard to very hard. The mudstones are medium to light grey, often silty and calcareous.

  Basal stratotype

  The lower boundary is towards the Kyrre Formation or an unconformity above older rocks. The boundary towards the Kyrre Formation is identified by the absence of relatively thick limestone beds in this formation and a lower content of calcareous material in the mudstone. This results in a decrease in gamma-ray intensity and an increase in velocity from the Kyrre Formation into the Hardråde Formation (Fig 5.36) . The formation has an unconformable lower boundary in the Troll area.

  Characteristics of the upper boundary

  The upper boundary is towards the Rogaland Group . When it is towards the Lista Formation it is characterized by an upward increase in gamma-ray intensity and a distinct drop in velocity due to a transition from limestones to mudstones (Fig 5.36) . An upper boundary towards the Våle Formation lacks the distinct drop in velocity. This is due to the presence of limestones and a more marly facies in the Våle Formation . An upper boundary towards the Ty Formation is shown by a change to sandstone.

  Distribution

  The formation is present on the Horda Platform (Fig 5.32ab) .

  Age

  Late Campanian to Maastrichtian.

  Depositional environment

  Open marine.

  Remarks

  The Hardråde Formation is time-equivalent with the Jorsalfare and Tor formations of the Shetland Group (Fig 5.6) .

  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]
  25/1-4	30.05.1974	2687	2795
  25/2-1	21.09.1973	2653	2740
  25/2-2	11.07.1974	2703	2740
  25/2-3	09.10.1974	2726	2795
  25/2-4	20.10.1975	2617	2925
  25/2-5	04.08.1976	2702	2990
  25/2-6	15.11.1977	2631	2931
  25/2-12	12.11.1988	2622	2850
  25/2-12 A	06.04.1989	2622	2850
  25/2-13	25.01.1990	2706	3032
  25/2-14	30.03.1991	2552	2844
  25/2-15	13.01.1993	2684	2823
  25/2-15 R	01.03.1993	2688	2827
  25/2-15 R2	11.04.1993	2688	2827
  25/2-16 S	13.09.2001	2909	3130
  25/2-18 A	19.10.2016	2854	3136
  25/2-18 B	30.10.2016	2894	3249
  25/2-18 C	17.11.2016	2781	3073
  25/2-18 S	11.09.2016	2653	2883
  25/2-19 A	08.10.2017	2791	3056
  25/2-23 S	01.04.2022	2870	3115
  25/5-1	01.08.1987	2588	2802
  25/5-1 A	16.09.1987	2616	2953
  25/5-2	04.07.1989	2630	2855
  25/5-3	26.03.1990	2310	2347
  25/5-4	07.03.1991	2559	2762
  25/6-1	03.02.1986	2164	2192
  25/6-2	29.05.1992	2207	2239
  25/6-3	11.11.1999	2443	2475
  25/6-4 S	15.02.2012	2413	2760
  26/4-1	17.07.1987	2350	2584
  30/5-2	21.12.1996	2449	2470
  30/6-13	14.05.1983	2288	2375
  30/6-13 R	11.09.1986	2288	2375
  30/6-18	23.11.1985	2380	2400
  30/6-25 S	06.01.1999	2320	2336
  30/6-26	07.10.2001	2307	2431
  30/6-27	30.10.2001	2396	2405
  30/8-1 S	01.03.1995	2444	2472
  30/8-1 SR	01.03.1996	2444	2472
  30/8-3	05.01.1998	2431	2454
  30/8-4 S	04.02.2009	2541	2811
  30/9-2	12.07.1983	2303	2420
  30/9-2 R	07.07.1986	2303	2420
  30/9-3	26.02.1984	2354	2578
  30/9-4 S	30.03.1985	2769	3041
  30/9-7	23.12.1988	2380	2613
  30/9-8 R	25.09.1989	2382	2620
  30/9-9	06.11.1989	2178	2292
  30/9-11	19.11.1990	2193	2286
  30/9-11 A	29.12.1990	2365	2498
  30/9-12	09.05.1991	2325	2523
  30/9-12 A	04.06.1991	2422	2638
  30/9-12 AR	11.07.2002	2426	2642
  30/9-13 S	11.10.1991	2493	2795
  30/9-13 SR	17.07.2002	2497	2799
  30/9-14	14.05.1993	2438	2682
  30/9-15	05.01.1994	2156	2242
  30/9-16	08.08.1994	2386	2587
  30/9-18	11.04.1995	2331	2440
  30/9-19	22.10.1998	2409	2418
  30/9-19 A	21.12.1998	2410	2441
  30/9-20 S	11.02.2002	2361	2588
  30/9-21 A	15.06.2008	2735	2836
  30/9-21 S	30.04.2008	2675	2770
  30/9-22	10.03.2009	2430	2678
  30/9-23	21.08.2009	2119	2201
  30/9-24	17.10.2009	2373	2618
  30/9-25	20.09.2013	2366	2611
  30/9-28 S	26.02.2016	2394	2648
  30/9-B-18	25.09.1992	3062	3258
  30/9-B-18 A	23.10.1992	3062	3258
  30/10-2	28.03.1974	2691	2755
  30/10-6	09.11.1992	2589	2832
  30/10-7	17.10.1992	2580	2612
  30/11-3	14.03.1983	2601	2892
  30/11-5	09.01.1997	2561	2835
  30/11-6 S	02.07.2004	2639	2846
  30/11-8 A	03.07.2011	2581	2940
  30/11-8 S	20.05.2011	2567	2943
  30/11-9 A	08.01.2014	2800	3136
  30/11-9 S	13.11.2013	2605	2886
  30/11-11 A	07.04.2016	3037	3404
  30/11-11 S	19.03.2016	2584	2839
  30/11-12 A	20.05.2016	2969	3348
  30/11-12 S	04.05.2016	2585	2862
  30/11-13	06.06.2016	2548	2768
  30/11-14	06.07.2016	2535	2748
  30/11-14 B	23.07.2016	3160	3434
  30/12-1	07.03.1994	2429	2544
  30/12-2	27.08.2019	2533	2800
  31/2-6	17.10.1981	1464	1476
  31/2-10	31.10.1982	1539	1555
  31/2-19 S	13.07.1996	2126	2250
  31/2-22 A	16.03.2021	1952	2010
  31/2-22 S	03.03.2021	1848	1881
  31/3-4	05.01.2014	1416	1502
  31/4-9	07.03.1987	2043	2093
  31/5-2	11.11.1983	1432	1441
  31/5-2 R	30.08.1984	1432	1441
  31/5-4 A	13.12.1990	1449	1461
  31/5-4 AR	18.07.1991	1449	1461
  31/5-4 AR2	05.09.2003	1456	1468
  31/5-4 S	10.10.1990	1449	1461
  31/5-7	06.03.2020	1698	1741
  31/6-1	28.10.1983	1232	1236
  31/6-2	11.12.1983	968	978
  31/6-2 R	08.09.1984	968	978
  31/6-3	26.12.1983	808	823
  31/6-5	21.05.1984	1144	1157
  31/6-6	29.07.1984	1018	1025
  31/6-8	25.05.1985	1256	1264
  31/6-8 R	22.09.1985	1256	1264
  31/7-1	22.06.2016	2085	2143
  31/7-1 A	14.07.2016	2275	2355
  31/7-2 A	27.07.2017	2488	2568
  31/7-2 S	08.07.2017	2094	2177
  31/7-3 A	18.01.2019	2642	2712
  31/7-3 S	16.12.2018	2461	2559
  31/10-1	25.07.2014	2348	2388
  32/4-2	21.09.2019	542	588
  32/4-3 S	26.10.2019	554	603
  35/11-4 R	27.01.1992	1845	1910
  35/11-7	29.09.1992	1735	1779

• Wellbores with cores

  Wellbores with cores

  Wellbore name	Wellbore completion date	Core length [m]
  30/9-9	06.11.1989	1
  30/9-15	05.01.1994	2
  31/7-2 S	08.07.2017	16