ETIVE FM

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General information

General information
Attribute	Value
Lithostrat. unit The lithostratigraphic unit's official name.	ETIVE FM
NPDID lithostrat. unit Norwegian Offshore Directorate's unique id for lithostratigraphic units.	35
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.	BRENT GP

Level below

Level below

Lithostrat. unit
Description
Etive Formation

Name

Named by Deegan and Scull (1977) who gave it "sub-unit" status.

Well type section

UK well 211/29-3 (Shell) from 2772 m to 2783 m, coord N 61°08'06", E 01°43'36.5" (Fig 3.10) .

Well reference sections

Norwegian wells 33/9-1 (Mobil) from 2575 m to 2602 m, coord N 61°15'07.5", E 01°50'25.8" (Fig 3.11) . 30/6-7 (Norsk Hydro) from 2727 m to 2786 m 1), coord N 60°38'39.49", E 02°45'21.74" (Fig 3.16) . and 31/4-4 (Norsk Hydro) from 2721 m to 2758 m, coord N 60°40'01.12", E 03°06'54.12" (Fig 3.17) .

Thickness

11 m in the type well, 27 m in 33/9-1 , 59 m in 30/6-7 and 37 m in 31/4-4 .

Lithology

The formation consists of massive grey-brown to clear, fine to coarse, occasionally pebbly and cross-bedded sandstones. The mica-content is generally low. Calcite cemented stringers are also present, especially on the Horda Platform.

Boundaries

The formation is characterised by low gamma ray readings. This characteristic and the low mica content distinguish it from the underlying Rannoch Formation. The lower boundary may, however, be transitional in places. The formation is often found to cut into and occasionally through the underlying formations, thus giving a “blocky” gamma ray log character either above a truncated Rannoch Formation , or directly above marine shales of the Dunlin Group (ref. well 31/4-4 ). The upper boundary is taken at the first significant shale or coal in the overlying Ness Formation .

Distribution

The distribution of the Etive Formation is essentially the same as that of the Brent Group .

Age

Bajocian.

Depositional environment

The formation has been interpretated as upper shoreface, barrier bar, mouth bar and distributary channel deposits.

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.

Footnotes

1): The lower part of the Etive Formation as defined in reference well 30/6-7 has been defined as the Oseberg Formation in Graue et al. (1987) with Top Oseberg Formation at 2739m.

References

Graue, E., Helland-Hansen, W., Johnsen, J., Lømo, L., Nøttvedt, A., Rønning, K., Ryseth and A., Steel, R. Advance and retreat of Brent Delta system, Norwegian North Sea. 915 - 937 in: Brooks, J. and Glennie, K. (eds.) 1987: Petroleum Geology of North West Europe.

Wellbores penetrating

Wellbores penetrating
Wellbore name	Wellbore completion date	Top depth [m]	Bottom depth [m]
29/3-1	15.09.1986	3852	3862
29/6-1	09.05.1982	4458	4474
29/9-1	24.02.1984	4394	4406
30/2-1	12.10.1982	3720	3778
30/2-2	04.05.1985	4070	4075
30/2-3	05.10.1992	3934	3944
30/3-1 R	26.04.1982	3826	3852
30/3-2 R	16.02.1981	2879	2882
30/3-3	30.05.1983	3034	3116
30/3-4	12.06.1985	2873	2949
30/3-4 R	18.11.2001	2875	2951
30/3-5 S	19.06.1992	4127	4142
30/3-6 S	06.03.1994	5442	5481
30/3-7 A	29.01.1998	6504	6517
30/3-7 B	04.08.1998	5202	5229
30/3-7 B	04.08.1998	5674	5693
30/3-7 BR	17.11.2001	5202	5229
30/3-7 BR	17.11.2001	5674	5693
30/3-7 S	12.12.1995	4897	4910
30/3-7 S	12.12.1995	5056	5063
30/3-8 A	23.05.2000	4225	4250
30/3-8 A	23.05.2000	4801	4821
30/3-8 A	23.05.2000	4858	6208
30/3-8 S	04.05.2000	4218	4243
30/3-8 S	04.05.2000	4780	4791
30/3-11 S	09.09.2022	4528	4535
30/4-1	14.05.1979	5320	5340
30/4-2	16.05.1980	4024	4036
30/4-3 S	09.10.2016	4549	4556
30/6-1	22.09.1979	2320	2345
30/6-2	11.12.1979	2211	2237
30/6-4	11.05.1981	2630	2686
30/6-5	15.08.1981	2865	2958
30/6-6	24.03.1982	2931	2965
30/6-7	24.08.1982	2727	2737
30/6-8	06.08.1982	3135	3171
30/6-9	16.12.1982	2554	2620
30/6-9 R	12.05.1990	2552	2618
30/6-10	02.12.1982	2541	2575
30/6-10 A	03.03.1983	2572	2608
30/6-11	30.03.1983	3459	3561
30/6-13	14.05.1983	2628	2671
30/6-13 R	11.09.1986	2628	2671
30/6-14	08.02.1984	2560	2589
30/6-15	05.09.1984	2884	2902
30/6-16	21.01.1985	2856	2868
30/6-19	21.06.1986	2905	2915
30/6-19 R	25.05.1994	2904	2914
30/6-22	13.07.1988	2916	2938
30/6-22 R	02.06.1994	2915	2937
30/6-23	01.07.1990	2828	2836
30/6-25 S	06.01.1999	2699	2704
30/6-25 S	06.01.1999	2889	2904
30/6-30	18.11.2018	3336	3350
30/7-6 R	03.06.1978	4001	4035
30/7-8 R	29.01.1982	4250	4283
30/9-1	29.01.1983	2735	2783
30/9-2	12.07.1983	2698	2767
30/9-2 R	07.07.1986	2698	2767
30/9-3	26.02.1984	2971	3045
30/9-3 A	20.05.1984	3059	3133
30/9-7	23.12.1988	3093	3110
30/9-8 R	25.09.1989	3120	3135
30/9-9	06.11.1989	2390	2408
30/9-16	08.08.1994	2977	2989
30/9-19	22.10.1998	3485	3490
30/9-19 A	21.12.1998	3712	3715
30/9-23	21.08.2009	2806	2812
30/9-28 S	26.02.2016	3281	3301
30/9-B-18	25.09.1992	3818	3825
30/9-B-18 A	23.10.1992	3686	3694
30/9-B-18 A	23.10.1992	4769	4787
30/11-7	03.02.2009	4002	4017
30/11-8 A	03.07.2011	4412	4425
30/11-8 S	20.05.2011	3976	3993
30/11-10	26.12.2014	3992	3997
30/11-14	06.07.2016	3401	3405
30/11-14 B	23.07.2016	4123	4129
31/1-1	15.02.2008	2514	2564
31/1-2 A	29.01.2021	3682	3694
31/1-2 S	12.01.2021	3293	3301
31/2-21 S	04.06.2014	2998	3013
31/3-2	30.04.1984	1966	2006
31/3-4	05.01.2014	2114	2122
31/4-4	17.02.1981	2721	2798
31/4-6	20.04.1982	2356	2380
31/4-A-13 C	26.07.2022	7062	7068
31/5-7	06.03.2020	2487	2510
31/7-1	22.06.2016	2415	2425
32/4-1	04.12.1996	1655	1680
32/4-3 S	26.10.2019	1645	1669
33/9-1	04.06.1974	2567	2596
33/9-3	14.11.1974	2508	2540
33/9-5	01.01.1976	2718	2774
33/9-6	31.08.1976	3086	3103
33/9-12	03.08.1987	2504	2517
33/9-14	09.04.1988	2792	2836
33/9-15	08.06.1992	3003	3007
33/9-19 A	09.08.1996	2840	2939
33/9-19 S	23.07.1996	2689	2742
33/9-20 S	09.09.2006	5477	5502
33/9-21 S	19.03.2009	5927	6051
33/12-6	21.06.1976	3216	3250
33/12-7	27.04.1989	3235	3248
33/12-8 A	16.05.2002	5041	5075
33/12-8 S	26.04.2002	3075	3098
33/12-9 S	08.01.2012	3706	3727
34/6-1 S	28.08.2002	3512	3583
34/7-5	16.03.1985	2531	2564
34/7-12	17.12.1987	2252	2269
34/7-13	13.04.1988	2493	2523
34/7-14	02.12.1989	2305	2343
34/7-15 S	03.09.1990	4460	4513
34/7-16	13.08.1990	2390	2434
34/7-16 R	15.10.1990	2391	2435
34/7-16 R2	05.07.1994	2390	2434
34/7-17	07.04.1991	2559	2631
34/7-17 A	04.05.1991	2572	2650
34/7-18	17.09.1991	2298	2328
34/7-19	27.12.1991	2528	2582
34/7-19 R	12.07.1994	2535	2589
34/7-20	27.08.1992	2649	2695
34/7-21	11.12.1992	2865	2903
34/7-22	01.10.1993	2356	2375
34/7-25 S	14.09.1996	3086	3101
34/7-27	07.10.1998	2837	2887
34/7-32	27.10.2001	2535	2557
34/7-33	15.10.2008	2470	2499
34/8-1	08.03.1986	2851	2900
34/8-3	14.09.1988	2867	2897
34/8-3 A	31.10.1988	3101	3131
34/8-5	01.04.1991	2970	2983
34/8-6	03.11.1991	3724	3757
34/8-7	16.07.1992	4699	4714
34/8-7 R	10.02.1993	4699	4714
34/8-8	24.08.1992	2967	3008
34/8-8 R	09.03.1993	2967	3007
34/8-9 S	28.12.1992	2956	2963
34/8-10 S	09.12.1993	2888	2897
34/8-11	08.02.1994	2908	2949
34/8-13 S	26.06.2009	3945	3953
34/8-14 A	01.12.2008	3572	3617
34/8-14 B	25.01.2009	3678	3809
34/8-14 C	08.12.2008	3684	3722
34/8-14 D	10.02.2009	3705	3752
34/8-14 S	21.10.2008	3301	3337
34/8-15 S	19.02.2013	3507	3546
34/10-1	08.09.1978	1833	1871
34/10-2	08.12.1978	3070	3083
34/10-3	07.06.1979	1978	2002
34/10-3 R	10.10.1987	1975	1999
34/10-5	02.01.1980	2035	2070
34/10-6	22.01.1980	2165	2197
34/10-8	25.05.1980	1975	2005
34/10-9	09.05.1980	1836	1867
34/10-9 R	03.07.1980	1836	1867
34/10-12	12.09.1981	2176	2198
34/10-14	19.03.1982	1976	2003
34/10-16	11.04.1983	3399	3412
34/10-16 R	27.09.1983	3396	3409
34/10-17	08.07.1983	2934	2937
34/10-18	30.08.1983	2495	2524
34/10-21	22.10.1984	3497	3503
34/10-23	13.10.1985	4243	4287
34/10-33	15.12.1988	3365	3374
34/10-33 A	03.02.1989	3747	3758
34/10-33 C	01.08.1989	3601	3617
34/10-33 CR	27.04.1990	3601	3617
34/10-34	31.05.1991	2171	2188
34/10-36	13.07.1992	3511	3524
34/10-37	22.02.1995	2730	2750
34/10-39 S	20.06.1995	2712	2727
34/10-40 S	13.10.1995	5677	5712
34/10-41 S	28.08.1997	2785	2792
34/10-42 S	19.09.1999	4355	4369
34/10-43 S	11.04.2001	3303	3326
34/10-47 S	02.11.2002	3285	3355
34/10-48 S	22.12.2004	5456	5500
34/10-48 S	22.12.2004	5843	5856
34/10-49 B	21.05.2006	2530	2557
34/10-49 S	08.05.2006	2530	2557
34/10-52 A	06.08.2011	3442	3445
34/10-52 B	22.08.2011	3845	3874
34/10-53 A	01.06.2011	4753	4760
34/10-53 S	24.03.2011	3875	3890
34/10-54 A	18.04.2014	4182	4191
34/10-54 S	11.02.2014	4068	4076
34/11-1	25.10.1994	4164	4177
34/11-2 S	17.05.1996	4241	4261
34/11-3	16.01.1997	4140	4155
34/11-4	14.04.1999	4277	4292
34/11-5 S	03.07.2006	7291	7307
34/11-6 S	26.01.2017	7033	7057
34/12-1	30.04.2008	4447	4457
35/7-1 S	15.08.2011	4409	4454
35/8-1	24.01.1981	3628	3680
35/8-2	21.05.1982	3786	3814
35/8-3	15.10.1988	3880	3896
35/8-5 S	20.07.2003	3926	3975
35/9-2	03.04.1991	2640	2646
35/9-6 S	07.12.2010	3505	3515
35/9-7	14.04.2012	2953	2974
35/9-8	11.04.2013	3205	3215
35/9-9	18.11.2013	3065	3092
35/9-10 A	16.01.2014	3153	3172
35/9-10 S	26.11.2013	3570	3580
35/9-11 A	21.05.2014	3492	3523
35/9-11 S	15.04.2014	3503	3522
35/9-12 S	26.12.2014	3526	3537
35/10-1	16.01.1992	3449	3460
35/10-2	22.08.1996	4245	4280
35/10-4 S	10.10.2018	3742	3761
35/10-7 A	27.12.2021	3431	3468
35/10-7 S	11.12.2021	3343	3374
35/11-1	06.08.1984	2534	2557
35/11-2	04.12.1987	3475	3487
35/11-3 S	09.09.1989	3528	3538
35/11-4	29.12.1990	2656	2686
35/11-4 R	27.01.1992	2666	2696
35/11-5	03.11.1991	3293	3312
35/11-6	20.04.1992	3605	3635
35/11-7	29.09.1992	2454	2511
35/11-8 S	11.05.1996	3459	3480
35/11-10	23.06.1997	2718	2728
35/11-10 A	14.07.1997	3143	3190
35/11-11	22.05.1998	3077	3085
35/11-17	01.05.2014	2712	2744
35/11-18	27.09.2015	3600	3617
35/11-18 A	16.12.2015	3657	3665
35/11-20 B	15.09.2016	4706	4725
35/11-21 A	17.10.2018	2792	2809
35/11-21 S	05.09.2018	2665	2686
35/11-22 S	02.02.2019	3335	3353
35/11-23	06.11.2019	2759	2816
35/11-25 A	04.06.2021	3614	3692
35/12-2	15.07.2009	2510	2541
35/12-3 S	16.02.2011	2748	2807
35/12-4 A	17.07.2011	3351	3373
35/12-4 S	26.06.2011	3177	3205
35/12-5 S	19.06.2015	3519	3535
35/12-7	25.07.2018	2663	2683
36/1-4 S	30.01.2022	3150	3182
36/7-1	07.05.1996	2700	2727

Wellbores with cores

Wellbores with cores
Wellbore name	Wellbore completion date	Core length [m]
29/9-1	24.02.1984	12
30/2-1	12.10.1982	57
30/3-2 R	16.02.1981	3
30/3-4	12.06.1985	73
30/3-5 S	19.06.1992	15
30/3-6 S	06.03.1994	28
30/3-11 S	09.09.2022	7
30/6-1	22.09.1979	11
30/6-2	11.12.1979	26
30/6-4	11.05.1981	35
30/6-5	15.08.1981	78
30/6-6	24.03.1982	21
30/6-7	24.08.1982	10
30/6-8	06.08.1982	13
30/6-9	16.12.1982	66
30/6-10	02.12.1982	32
30/6-10 A	03.03.1983	19
30/6-11	30.03.1983	45
30/6-13	14.05.1983	31
30/6-14	08.02.1984	2
30/6-16	21.01.1985	12
30/6-19	21.06.1986	10
30/6-22	13.07.1988	22
30/6-23	01.07.1990	8
30/6-30	18.11.2018	14
30/9-1	29.01.1983	46
30/9-2	12.07.1983	63
30/9-3	26.02.1984	35
30/9-3 A	20.05.1984	19
30/9-9	06.11.1989	15
31/1-2 S	12.01.2021	0
33/9-3	14.11.1974	24
33/9-12	03.08.1987	13
33/9-14	09.04.1988	44
33/9-19 S	23.07.1996	18
34/7-5	16.03.1985	32
34/7-12	17.12.1987	17
34/7-13	13.04.1988	27
34/7-14	02.12.1989	38
34/7-16	13.08.1990	42
34/7-17	07.04.1991	26
34/7-18	17.09.1991	9
34/7-19	27.12.1991	53
34/8-1	08.03.1986	46
34/8-3	14.09.1988	30
34/8-3 A	31.10.1988	29
34/8-5	01.04.1991	14
34/8-8	24.08.1992	40
34/8-10 S	09.12.1993	9
34/8-11	08.02.1994	31
34/8-13 S	26.06.2009	7
34/10-1	08.09.1978	35
34/10-3	07.06.1979	21
34/10-8	25.05.1980	1
34/10-9	09.05.1980	14
34/10-14	19.03.1982	26
34/10-16	11.04.1983	13
34/10-17	08.07.1983	3
34/10-23	13.10.1985	44
34/10-33	15.12.1988	9
34/10-34	31.05.1991	17
34/10-54 S	11.02.2014	8
34/11-1	25.10.1994	9
34/11-2 S	17.05.1996	20
34/11-3	16.01.1997	13
35/8-1	24.01.1981	52
35/9-2	03.04.1991	7
35/9-11 A	21.05.2014	26
35/10-1	16.01.1992	11
35/10-7 S	11.12.2021	31
35/11-1	06.08.1984	4
35/11-2	04.12.1987	12
35/11-5	03.11.1991	14
35/11-6	20.04.1992	30
35/11-7	29.09.1992	56
35/11-10	23.06.1997	10
35/11-11	22.05.1998	0
35/11-17	01.05.2014	26
35/11-21 A	17.10.2018	18
35/11-21 S	05.09.2018	21
35/11-25 A	04.06.2021	72

ETIVE FM

General information

Level below

Description

Wellbores penetrating

Wellbores with cores