SLEIPNER FM

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• General information

  General information

  Attribute	Value
  Lithostrat. unit The lithostratigraphic unit's official name.	SLEIPNER FM
  NPDID lithostrat. unit Norwegian Offshore Directorate's unique id for lithostratigraphic units.	148
  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.	VESTLAND GP

• Level below

  Level below

  Lithostrat. unit

• Description

  Sleipner Formation
  
  Name

  From the Sleipner Field . Sleipner was Odin's eight-legged horse in Norse mythology (Larsen and Jaarvik, 1981).

  Well type section

  Norwegian well 15/9-2 (Statoil) from 3657 m to 3699 m, coord N 58°25 '34.06'', E 01°42'28.2'' (Fig 3.26) .

  Well reference section

  Norwegian well 15/12-1 (Statoil) from 3152 m to 3204 m, coord N 58° 10'32.6'', E 01°44'23.6" (Fig 3.27) .

  Thickness

  42 m in the type well and 52 m in the reference well.

  Lithology

  The formation consists of a mixed sandstone and silty claystone lithology with coal measures. The sandstones are non-calcareous, light to medium brown, fine to medium grained, with occasional coarse and pebbly layers. The sandstones show a moderate to poor sorting with sub-angular to sub-rounded grains. The silty claystones are medium to dark grey or greyish brown, micromicaceous, hard and slightly fissile. Coal fragments, fossil leaves and root hairs are commonly found. The coals are mature, black and massive, often with thin laminations of silty claystone.

  Boundaries

  The formation lies unconformably on erosional relics of lower Jurassic or older rocks, and a break on dipmeter logs can frequently be observed. Sandstones within the formation in general show lower interval velocites than sandstones in the underlying formations. The upper boundary marks the transition into the shales of the Viking Group or the sandstones of the Hugin Formation . Where the formation is overlain by the shales, clear breaks can be observed both on sonic and gamma ray logs. Where the formation is overlain by the Hugin Formation , the erratic sonic log pattern of the Sleipner Formation becomes smoother when entering the overlying sandstones. On gamma ray logs the sandstones of the Hugin Formation in general appear cleaner, more massive and often thicker than in the Sleipner Formation.

  Distribution

  The formation is found in the southern Viking Graben between approximately 58° and 60°N. The Ness Formation in the East Shetland Basin is broadly equivalent to the Sleipner Formation. The name Sleipner Formation should be applied when the marine sandstones underlying the coaly sequence are absent. Non-marine sands, and associated strata, in the Central Graben and Norwegian-Danish Basin are referred to the Bryne Formation .

  Age

  Usually Bajocian to Bathonian, but can locally be as young as Callovian (e.g. 15/12-1 ).

  Depositional environment

  The Sleipner Formation represents a continental fluviodeltaic coaly sequence.

  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]
  15/2-1	24.02.1982	4393	4555
  15/3-3	09.08.1979	4545	5033
  15/3-4	30.03.1982	3856	4044
  15/3-5	13.05.1984	3935	4130
  15/3-7	01.09.2001	4793	4818
  15/3-9	13.08.2010	4614	4654
  15/3-11	09.08.2018	3959	4014
  15/3-12 S	20.01.2020	3749	3810
  15/5-1	08.04.1978	3616	3729
  15/5-2	16.12.1978	3995	4113
  15/5-7	07.09.2008	3919	4008
  15/5-7 A	13.10.2008	4098	4199
  15/6-2 R	01.08.1974	3638	3682
  15/6-5	29.11.1977	3680	3723
  15/6-6	09.06.1982	3621	3655
  15/6-9 A	13.06.2007	3631	3666
  15/6-9 B	23.07.2007	3950	4010
  15/6-9 S	27.05.2007	3794	3872
  15/6-10	06.04.2009	3510	3613
  15/6-11 A	13.03.2011	4201	4286
  15/6-11 S	19.12.2010	3921	3947
  15/6-12	09.02.2011	3810	3876
  15/6-13	15.05.2015	3481	3499
  15/6-13 A	03.06.2015	3817	3860
  15/6-13 B	29.06.2015	3660	3670
  15/6-14 S	26.12.2017	4657	4684
  15/6-15	02.06.2019	3521	3645
  15/6-16 S	28.06.2019	4020	4130
  15/8-1	07.01.1982	3945	4162
  15/8-2	21.10.2011	4238	4386
  15/9-1	30.05.1977	3616	3701
  15/9-2	17.06.1978	3657	3699
  15/9-3	03.04.1979	3622	3703
  15/9-4	14.06.1979	3563	3629
  15/9-5	11.04.1980	3693	3769
  15/9-6	07.09.1980	3786	3828
  15/9-7	29.04.1981	3721	3776
  15/9-8	25.05.1981	3493	3625
  15/9-10	07.11.1981	3127	3183
  15/9-12	27.02.1982	3694	3740
  15/9-14	27.06.1982	3254	3360
  15/9-18	02.03.1984	3410	3420
  15/9-19 B	02.02.1998	4179	4214
  15/9-21 S	23.05.1998	5032	5126
  15/9-22	13.03.2006	3713	3756
  15/9-23	03.01.2010	3087	3169
  15/12-1	06.09.1975	3152	3204
  15/12-4	31.10.1984	3134	3140
  15/12-6 S	04.11.1990	2949	2979
  15/12-9 S	08.10.1992	3620	3688
  15/12-10 S	04.11.1996	3420	3429
  15/12-11 S	19.05.1997	3419	3544
  15/12-14	31.12.2003	3255	3305
  15/12-15	21.12.2004	3279	3300
  15/12-18 S	07.11.2007	3443	3468
  15/12-20 S	01.07.2008	3808	3874
  15/12-21	21.05.2009	3059	3122
  15/12-21 A	21.06.2009	3412	3493
  15/12-23	29.05.2010	3164	3192
  15/12-23 A	18.07.2010	4632	4772
  16/1-3	27.09.1982	2730	2754
  16/1-7	28.05.2004	2953	3083
  16/1-9	22.04.2008	2399	2456
  16/1-11	26.04.2010	2381	2401
  16/1-11 A	09.05.2010	2476	2501
  16/1-21 A	20.04.2015	3187	3194
  16/1-26 A	24.04.2016	4710	4888
  16/1-33 S	05.08.2020	2850	3006
  16/2-7	01.09.2011	1965	1985
  16/2-7 A	29.09.2011	2024	2039
  16/2-8	19.08.2011	1945	1949
  16/2-10	28.10.2011	1962	1968
  16/4-10	07.03.2016	2471	2583
  16/10-1	14.07.1986	3038	3053
  24/6-1	25.08.1985	4716	4789
  24/12-6 S	20.12.2010	5120	5207
  25/2-4	20.10.1975	3752	3876
  25/2-5	04.08.1976	3407	3489
  25/2-6	15.11.1977	3257	3317
  25/2-7	12.07.1982	3418	3628
  25/2-12	12.11.1988	3713	3800
  25/2-13	25.01.1990	3409	3491
  25/2-14	30.03.1991	3156	3322
  25/2-15 R2	11.04.1993	3611	3916
  25/2-16 S	13.09.2001	3921	3970
  25/2-18 A	19.10.2016	3826	4049
  25/2-18 B	30.10.2016	4100	4335
  25/2-18 C	17.11.2016	4029	4301
  25/2-18 S	11.09.2016	3557	3783
  25/2-19 A	08.10.2017	3919	4210
  25/3-1	05.09.1989	3120	3334
  25/4-1	09.12.1972	3190	3292
  25/4-5	26.03.1981	3730	3820
  25/4-6 S	24.08.1991	3874	3940
  25/4-6 SR	14.09.2003	3883	3949
  25/5-1	01.08.1987	2996	3060
  25/5-1 A	16.09.1987	3329	3403
  25/5-2	04.07.1989	3194	3231
  25/5-3	26.03.1990	2431	2453
  25/5-4	07.03.1991	2920	2941
  25/6-1	03.02.1986	2290	2297
  25/6-4 S	15.02.2012	2841	2899
  25/6-6 S	22.04.2019	2657	2678
  25/7-2	18.07.1990	4613	4850
  25/7-8 S	09.01.2020	2847	2872
  25/8-2	01.10.1975	2288	2330
  25/8-5 S	22.09.1994	2878	2922
  25/8-5 SR	03.08.1997	2878	2922
  25/8-7	12.08.1995	2329	2340
  25/8-9	28.01.1997	2477	2515
  25/9-4	27.02.2014	2391	2419
  25/10-6 S	22.03.1996	4489	4706
  25/10-17 S	10.02.2023	3751	3903
  26/4-1	17.07.1987	2820	2872
  30/11-4	24.07.1984	3668	4010

• Wellbores with cores

  Wellbores with cores

  Wellbore name	Wellbore completion date	Core length [m]
  15/3-3	09.08.1979	33
  15/3-11	09.08.2018	9
  15/3-12 S	20.01.2020	11
  15/5-1	08.04.1978	5
  15/5-2	16.12.1978	15
  15/5-7	07.09.2008	21
  15/6-2 R	01.08.1974	3
  15/6-5	29.11.1977	2
  15/6-6	09.06.1982	23
  15/6-9 S	27.05.2007	17
  15/6-13	15.05.2015	15
  15/9-1	30.05.1977	60
  15/9-2	17.06.1978	29
  15/9-4	14.06.1979	27
  15/9-6	07.09.1980	2
  15/9-8	25.05.1981	0
  15/9-10	07.11.1981	33
  15/9-14	27.06.1982	19
  15/12-1	06.09.1975	27
  15/12-6 S	04.11.1990	15
  15/12-9 S	08.10.1992	19
  15/12-10 S	04.11.1996	2
  15/12-11 S	19.05.1997	0
  15/12-20 S	01.07.2008	57
  15/12-21	21.05.2009	38
  15/12-23	29.05.2010	5
  15/12-23 A	18.07.2010	108
  16/1-9	22.04.2008	9
  16/1-11	26.04.2010	15
  16/1-21 A	20.04.2015	7
  16/2-7	01.09.2011	8
  16/2-7 A	29.09.2011	15
  16/2-8	19.08.2011	4
  16/2-10	28.10.2011	0
  25/2-4	20.10.1975	38
  25/2-5	04.08.1976	9
  25/2-6	15.11.1977	15
  25/2-7	12.07.1982	19
  25/2-12	12.11.1988	2
  25/2-13	25.01.1990	64
  25/2-14	30.03.1991	12
  25/3-1	05.09.1989	10
  25/4-1	09.12.1972	49
  25/4-5	26.03.1981	1
  25/4-6 S	24.08.1991	28
  25/5-1	01.08.1987	63
  25/5-2	04.07.1989	33
  25/5-4	07.03.1991	21
  25/6-1	03.02.1986	7
  25/8-7	12.08.1995	10
  25/8-9	28.01.1997	13