FENSFJORD FM

hide details Export:  PDF

• General information

  General information

  Attribute	Value
  Lithostrat. unit The lithostratigraphic unit's official name.	FENSFJORD FM
  NPDID lithostrat. unit Norwegian Offshore Directorate's unique id for lithostratigraphic units.	40
  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.	VIKING GP

• Level below

  Level below

  Lithostrat. unit

• Description

  Fensfjord Formation
  
  Name

  After a fjord on the west coast of Norway, adjacent to the type area in Quadrant 31.

  Well type section

  Norwegian well 31/2-1 (Shell) from 1594.5 m to 1741.5 m, coord N 60°46 '19.16", E 03°33' 15.87", (Fig 3.21) .

  Well reference section

  None at present.

  Lithology

  The formation consists of sandstones, grey-brown in colour, fine to medium grained, well sorted and moderately friable to consolidated. Calcite cemented sandstones occur in bands containing common bioclastic material. In the type well it is often carbonaceous and occasionally micaceous. Minor shale intercalations occur throughout. The formation has a "serrate" log character, composed of 3-5 m thick units arranged in several cycles.

  Boundaries

  The formation has an overall higher gamma ray intensity and larger FDC-CNL separation than the underlying Krossfjord Formation . The top of the Fensfjord Formation is characterized by a transition in the gamma ray log from a high intensity, serrate log shape to a high intensity but smooth outline in the overlying Heather Formation .

  Distribution

  The formation has only been clearly recognized in the Troll Field area.

  Age

  Callovian.

  Depositional environment

  The formation was deposited in a coastal shallow marine environment.

  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]
  30/9-23	21.08.2009	2501	2668
  31/2-1	09.11.1979	1595	1742
  31/2-1 R	09.11.1981	1596	1743
  31/2-2	23.04.1980	1700	1848
  31/2-2 R	06.10.1980	1700	1848
  31/2-3	20.07.1980	1561	1677
  31/2-4 R	06.04.1981	1520	1625
  31/2-4 R2	12.11.1982	1520	1625
  31/2-5	21.12.1980	1693	1789
  31/2-5 R	20.07.1981	1686	1782
  31/2-5 R2	22.04.1984	1686	1782
  31/2-6	17.10.1981	1673	1760
  31/2-8	18.08.1982	2189	2254
  31/2-9	01.10.1982	1708	1770
  31/2-10	31.10.1982	1793	1833
  31/2-11	25.05.1983	1678	1744
  31/2-12	09.09.1983	1541	1615
  31/2-13 S	15.03.1984	1934	2010
  31/2-14	21.06.1984	1685	1725
  31/2-15	15.11.1984	1636	1677
  31/2-17 A	31.01.1992	1895	1924
  31/2-17 S	20.01.1992	2180	2220
  31/2-18	07.10.1992	1688	1711
  31/2-18 A	17.10.1992	1706	1916
  31/2-20 S	08.12.2002	2887	3148
  31/2-21 S	04.06.2014	2562	2932
  31/2-22 S	03.03.2021	2231	2328
  31/3-1	13.10.1983	1516	1668
  31/3-2	30.04.1984	1725	1851
  31/3-3	18.11.1984	1931	2077
  31/3-4	05.01.2014	1850	1996
  31/4-2	15.11.1979	2190	2325
  31/4-3	11.05.1980	2136	2327
  31/4-4	17.02.1981	2482	2527
  31/4-5	29.07.1981	2104	2278
  31/4-6	20.04.1982	2150	2318
  31/4-7	11.09.1984	2026	2102
  31/4-8	11.05.1986	2088	2117
  31/4-9	07.03.1987	2169	2368
  31/4-10	13.12.1995	2168	2218
  31/4-11	12.09.2000	2351	2426
  31/4-12	14.03.2005	2172	2226
  31/4-A-13 C	26.07.2022	5209	5445
  31/5-2	11.11.1983	1674	1826
  31/5-2 R	30.08.1984	1674	1826
  31/5-3	09.06.1984	1718	1848
  31/5-4 S	10.10.1990	1879	1909
  31/5-5	11.02.1993	1725	1855
  31/5-5 R	27.07.2002	1732	1862
  31/5-6	25.07.2000	1955	2056
  31/5-7	06.03.2020	2140	2278
  31/6-1	28.10.1983	1518	1720
  31/6-2	11.12.1983	1642	1875
  31/6-2 R	08.09.1984	1642	1875
  31/6-3	26.12.1983	1669	1756
  31/6-5	21.05.1984	1702	1937
  31/6-6	29.07.1984	1719	1947
  31/6-8	25.05.1985	1705	1927
  31/6-8 R	22.09.1985	1705	1927
  31/7-1	22.06.2016	2230	2373
  31/7-1 A	14.07.2016	2478	2530
  31/7-2 A	27.07.2017	2692	2723
  31/7-2 S	08.07.2017	2292	2377
  31/7-3 A	18.01.2019	2810	2863
  31/7-3 S	16.12.2018	2633	2705
  31/8-1	24.07.2011	2367	2498
  31/11-1 S	28.06.2021	2615	2678
  32/2-1	01.07.2008	1012	1115
  32/4-1	04.12.1996	1366	1595
  32/4-3 S	26.10.2019	1415	1551
  35/9-1	07.05.1989	2037	2099
  35/9-1 R	27.07.1989	2037	2099
  35/9-2	03.04.1991	2188	2481
  35/9-9	18.11.2013	2602	2848
  35/9-12 S	26.12.2014	3097	3156
  35/9-12 S	26.12.2014	3225	3257
  35/11-1	06.08.1984	2113	2180
  35/11-4	29.12.1990	2284	2365
  35/11-4 R	27.01.1992	2294	2375
  35/11-7	29.09.1992	2104	2181
  35/11-10	23.06.1997	2275	2385
  35/11-10 A	14.07.1997	2682	2824
  35/11-17	01.05.2014	2353	2402
  35/11-21 A	17.10.2018	2389	2467
  35/11-21 S	05.09.2018	2318	2361
  35/12-1	24.04.1992	2790	2886
  35/12-2	15.07.2009	2100	2159
  35/12-3 S	16.02.2011	2164	2269
  35/12-3 S	16.02.2011	2340	2594
  35/12-4 S	26.06.2011	2527	2683
  35/12-5 S	19.06.2015	3100	3194
  35/12-6 A	30.06.2018	3157	3218
  35/12-6 S	14.06.2018	2997	3037
  35/12-7	25.07.2018	2209	2283
  36/7-1	07.05.1996	2235	2510
  36/7-2	22.09.1997	947	1363

• Wellbores with cores

  Wellbores with cores

  Wellbore name	Wellbore completion date	Core length [m]
  31/2-1	09.11.1979	67
  31/2-3	20.07.1980	83
  31/2-4 R	06.04.1981	96
  31/3-1	13.10.1983	82
  31/4-2	15.11.1979	17
  31/4-3	11.05.1980	32
  31/4-4	17.02.1981	18
  31/4-5	29.07.1981	86
  31/4-6	20.04.1982	63
  31/4-7	11.09.1984	55
  31/4-9	07.03.1987	53
  31/4-10	13.12.1995	42
  31/4-11	12.09.2000	65
  31/5-5	11.02.1993	32
  31/6-1	28.10.1983	82
  31/6-3	26.12.1983	25
  31/6-5	21.05.1984	19
  31/6-6	29.07.1984	54
  31/7-1	22.06.2016	19
  35/9-1	07.05.1989	31
  35/9-2	03.04.1991	134
  35/11-4	29.12.1990	36
  35/11-10	23.06.1997	40
  35/11-17	01.05.2014	44
  35/11-21 A	17.10.2018	48
  35/12-2	15.07.2009	1
  35/12-4 S	26.06.2011	35
  35/12-6 S	14.06.2018	24
  36/7-1	07.05.1996	179