FRIGG FM

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• General information

  General information

  Attribute	Value
  Lithostrat. unit The lithostratigraphic unit's official name.	FRIGG FM
  NPDID lithostrat. unit Norwegian Offshore Directorate's unique id for lithostratigraphic units.	45
  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.	HORDALAND GP

• Level below

  Level below

  Lithostrat. unit

• Description

  Frigg Formation
  
  Name

  Named by Deegan & Scull (1977) after a Norse goddess, the wife of Odin.

  Well type section

  Norwegian well 25/1-1 from 2115 m to 1836 m, coordinates N 59°53'17.40", E 02°04'42.70" (Fig 5.62) . 42 m of cores (1868-1910 m).

  Well reference section

  Norwegian well 30/7-6 from 1923 m to 1783 m, coordinates N 60°29'29.82", E 02°03'26.14" (Fig 5.63) . No cores.

  Thickness

  The formation has a thickness of 279 m in the type well and 140 m in the reference well. A depocentre with a maximum thickness of approximately 300 m lies in Norwegian block 25/1.

  Lithology

  The formation consists of sandstones with some lenses and streaks of silty claystone. The sandstones are poorly consolidated, light brown to buff, micaceous and carbonaceous, and very fine to medium, occasionally coarse grained. Some layers have a calcareous cement. Traces of glauconite are present. The silty claystones are green to grey and carbonaceous.

  Basal stratotype

  The lower boundary normally shows a decrease in gamma-ray intensity and an increase in velocity from the Balder Formation into the Frigg Formation (Fig 5.62) .

  Characteristics of the upper boundary

  The top of the formation is placed where the sandstones give way to light grey to brown, occasionally green claystone of the Hordaland Group . The boundary is seen on logs as an increase in gamma-ray response and a decrease in velocity (Fig 5.62) .

  Distribution

  The Frigg Formation is found in the southwestern part of quadrant 30, the northwestern part of quadrant 25, and in adjacent areas in the UK sector. The Frigg sands of the Beryl and Brace Fields just extend into the Norwegian sector at about 59°30'N.

  Age

  Early Eocene.

  Depositional environment

  The Frigg Formation was deposited as submarine fans, by gravity flows. The mode of deposition led to the formation varying in thickness over short distances. The source was the East Shetland Platform to the west.

  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]
  15/5-1	08.04.1978	1706	2057
  15/5-2	16.12.1978	1608	2128
  15/5-4	03.07.1991	1586	2072
  15/9-3	03.04.1979	1810	2133
  15/9-4	14.06.1979	2172	2307
  15/9-5	11.04.1980	1913	2290
  15/9-6	07.09.1980	1807	2228
  15/9-7	29.04.1981	1937	2305
  15/9-8	25.05.1981	2156	2174
  15/9-12	27.02.1982	1823	2220
  15/9-15	01.08.1982	2027	2208
  15/9-23	03.01.2010	2092	2110
  15/9-23	03.01.2010	2137	2161
  24/9-3	15.04.1981	1739	1831
  24/9-4	17.06.1991	1766	1906
  25/1-1	22.07.1971	1836	2115
  25/1-2	25.08.1971	1948	2049
  25/1-3	27.01.1972	1952	2244
  25/1-4	30.05.1974	1968	2058
  25/1-5	12.09.1975	1907	2182
  25/1-6	18.03.1978	2107	2150
  25/1-7	26.05.1985	1919	2180
  25/1-7 R	14.02.1987	1919	2180
  25/1-7 R2	10.05.1988	1916	2177
  25/1-7 R3	16.04.1989	1916	2177
  25/1-7 R4	05.04.1990	1916	2177
  25/1-8 S	25.07.1985	1930	2232
  25/1-8 SR4	14.04.1991	1927	2229
  25/1-8 SR3	06.04.1989	1927	2229
  25/1-8 SR2	15.05.1988	1927	2229
  25/1-8 SR	18.02.1987	1930	2232
  25/1-9	12.10.1986	2035	2237
  25/1-10	14.09.1988	1926	2171
  25/1-11 A	14.05.2010	2234	2290
  25/1-11 R	26.04.2010	2118	2205
  25/1-13	11.03.2019	2063	2119
  25/2-1	21.09.1973	1915	2003
  25/2-2	11.07.1974	1949	2196
  25/2-3	09.10.1974	2073	2211
  25/2-4	20.10.1975	2012	2061
  25/2-7	12.07.1982	2023	2149
  25/2-8	01.08.1984	1918	2201
  25/2-9	24.07.1985	1935	2223
  25/2-10 S	19.03.1986	2230	2501
  25/2-10 SR	22.09.1987	2234	2505
  25/2-11	10.05.1987	1950	2075
  25/2-12	12.11.1988	2042	2169
  25/2-12 A	06.04.1989	2042	2169
  25/2-17	11.10.2009	1949	2112
  25/2-18 S	11.09.2016	2118	2128
  25/2-19 A	08.10.2017	2132	2260
  25/2-19 S	11.09.2017	2100	2176
  25/2-23 A	23.01.2022	1980	2133
  25/2-23 S	01.04.2022	2120	2338
  25/3-1	05.09.1989	2127	2159
  25/4-11	23.08.2017	2214	2234
  25/5-9	25.02.2014	2036	2083
  29/6-1	09.05.1982	1827	1881
  29/9-1	24.02.1984	1782	1981
  30/4-2	16.05.1980	1820	1959
  30/4-3 S	09.10.2016	1829	1997
  30/4-4	25.12.2023	1918	1942
  30/7-2	09.11.1975	1748	1909
  30/7-6	31.07.1977	1783	1965
  30/7-6 R	03.06.1978	1784	1965
  30/7-8	04.04.1981	1782	1927
  30/7-8 R	29.01.1982	1782	1927
  30/10-1	18.07.1973	1960	2076
  30/10-2	28.03.1974	1997	2067
  30/10-3	31.08.1974	2030	2073
  30/10-5	01.05.1975	1965	2075
  30/11-1	14.03.1975	1953	2155
  30/11-2	16.04.1975	2052	2138
  30/11-3	14.03.1983	2027	2172
  30/11-4	24.07.1984	1989	2160
  30/11-7	03.02.2009	2119	2152
  30/11-7 A	25.05.2009	2119	2152
  30/11-9 A	08.01.2014	2195	2299
  30/11-9 S	13.11.2013	2116	2193
  30/11-11 A	07.04.2016	2373	2460
  30/11-11 S	19.03.2016	2093	2157
  30/11-12 A	20.05.2016	2202	2419
  30/11-12 S	04.05.2016	2035	2173
  30/12-1	07.03.1994	2136	2156
  35/8-5 S	20.07.2003	1100	1347
  35/8-6 A	14.05.2016	1442	1712
  35/9-6 S	07.12.2010	989	1229
  35/9-7	14.04.2012	1108	1247
  35/9-8	11.04.2013	1108	1190
  35/9-10 A	16.01.2014	1181	1248
  35/9-10 S	26.11.2013	1181	1255
  35/9-11 A	21.05.2014	1018	1222
  35/9-11 S	15.04.2014	1018	1222
  35/11-20 A	07.08.2016	1527	1625
  35/11-20 B	15.09.2016	1527	1625
  35/11-20 S	19.06.2016	1527	1625
  35/12-6 S	14.06.2018	895	950

• Wellbores with cores

  Wellbores with cores

  Wellbore name	Wellbore completion date	Core length [m]
  24/9-3	15.04.1981	16
  24/9-4	17.06.1991	11
  25/1-1	22.07.1971	20
  25/1-3	27.01.1972	41
  25/1-4	30.05.1974	43
  25/1-5	12.09.1975	13
  25/1-6	18.03.1978	9
  25/1-7	26.05.1985	204
  25/1-8 S	25.07.1985	140
  25/1-9	12.10.1986	60
  25/2-1	21.09.1973	23
  25/2-2	11.07.1974	21
  25/2-8	01.08.1984	49
  25/2-9	24.07.1985	139
  25/2-10 S	19.03.1986	30
  25/2-11	10.05.1987	21
  25/2-17	11.10.2009	58
  25/2-23 A	23.01.2022	72
  30/7-2	09.11.1975	63
  30/10-1	18.07.1973	25
  30/10-2	28.03.1974	3
  30/10-3	31.08.1974	35
  30/11-1	14.03.1975	13