BRYNE FM
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General information
General information Attribute Value Lithostrat. unit The lithostratigraphic unit's official name.BRYNE FMNPDID lithostrat. unit Norwegian Offshore Directorate's unique id for lithostratigraphic units.19Level Indicates the lithostratigraphic unit's level. Legal values: GROUP, FORMATION, MEMBER.FORMATIONLithostrat. unit, parent The parent lithostratigraphic unit's official name. See also level. Will be empty if Level = GROUP. -
Level below
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Description
Bryne Formation
NameFrom a town in the south-western part of Norway. This new formation represents the lower part of the Haldager Formation as described by Deegan and Scull (1977).Well type sectionNorwegian well 9/4-3 (Conoco) from 2507.5 m to 2613 m, coord N 57°36'54.5", E 04°18'57.7" (Fig 3.29) .Well reference sectionNorwegian well 8/12-1 (Conoco) from 2710.5 m to 2813 m, coord N 57°13'18.6", E 03°46'45.13" (Fig 3.30) .ThicknessThe formation is 105.5 m thick in the type well and 102.5 m in the reference well. It shows local variations in thickness which probably reflect both Middle Jurassic syndepositional structuring and later erosion.LithologyThe Bryne Formation comprises interbedded sandstones, siltstones, shales and coals. The sandstones are white to grey, very fine to coarse grained, poorly sorted, friable to hard and occasionally kaolinitic. The shales are generally grey to brown, micaceous, occasionally silty, non-calcareous and often carbonaceous.BoundariesThe base of the Bryne Formation is unconformable and represents the contact with the partly eroded shales of the Fjerritslev Formation or with arenaceous Triassic rocks. The boundary with the Fjerritslev Formation is usually clearly defined on both gamma ray and sonic logs, whereas the boundary with the Lower Jurassic/ Triassic sandy sequences ( Gassum and Skagerrak formations) often gives no appreciable log breaks. However, on most logs the appearance of these sediments is marked by an overall sonic log shift to higher interval velocities. Where the formation is overlain by the shales of the Boknfjord or Tyne groups, clear breaks can be observed both on gamma ray and sonic logs. However, where the formation is overlain by the Sandnes or Ula formations the boundary is not so easily defined due to internal facies changes within these two formations (see description of the Sandnes and Ula formations).DistributionThe Bryne Formation is present in the Norwegian-Danish Basin and in the Central Graben. Two main Middle Jurassic depocentres are recognized; one in the Danish Sub-Basin and another in the Fiskebank Sub-Basin (Hamar et al., 1982). The Bryne Formation is equivalent to the Haldager Sand Member of the Haldager Formation as described in Denmark (Larsen, 1966; Michelsen, 1978).AgeMainly Bajocian to Bathonian, but may locally be older in the Norwegian-Danish Basin.Depositional environmentThe Bryne Formation represents deposition in a fluvial/deltaic environment.RemarksThe Bryne Formation as described above is ap proximately equivalent in age and lithofacies to the Sleipner Formation of the Southern Viking Graben. So far it is not possible to demonstrate a connection between the two deposits, and this constitutes the reason for use of separate nomenclature. The Bryne Formation represents the lower part of the Haldager Formation, extended into the Norwegian sector from the Danish sector by Deegan and Scull (1977). Having defined exten-sive marine sands worthy of formation status ( Ula , Sandnes formations) comprising the upper part of Deegan and Scull's Haldager Forma tion, workers on this project saw the need for a separate formation, defining the lower non-marine sands. The term "Haldager Formation" could not be used since it essentially equates to the Haldager Sand Member, the lower part of the Haldager Formation in the Danish sector (Michelsen, 1978). (The upper part of the Danish Haldager Formation is the Flyvberg Member, a marine sandstone/siltstone unit approximately time-equivalent to the Sandnes Formation of the Norwegian-Danish Basin). When a previously established formation is sub divided into new units which are formally given formation status, the original formation with its original name should be either raised to group rank or abandoned; the old name should not be retained for any of the divisions of the original unit (Hedberg, 1976). It was therefore thought expedient to abandon the name "Haldager Formation" in the Norwegian sector. It is recognised, however, that there is probably complete lithological continuity between the new Bryne Formation of the Norwegian sector and the Haldager Sand Member of the Danish Haldager Formation.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.
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Wellbores penetrating
Wellbores penetrating 24.03.19834542462016.09.20165911594226.02.19783347338429.03.19803991410103.08.19824261434605.04.19834199445412.08.19844566458706.03.19854061410523.11.19854063408106.07.19914257428907.05.19974506461710.02.19993548355007.03.20094241436228.02.20096036611105.09.20133450352303.07.19823752382027.08.19822917299507.06.19883902396924.07.19843215333204.11.19914877499615.07.19924877497329.02.19924389448614.03.20085225542622.02.20154622474321.01.20094525457630.05.19693233325625.05.19804560472325.02.19833545363802.06.19903542360602.02.19814810484014.03.19904807483709.06.19994634466827.04.19895191522514.12.19894543460020.08.19783345357523.01.19903474368807.02.19923436360903.03.20133949414828.04.20133563368014.09.20153430346727.05.20193554361108.05.20083122317505.02.19693230327529.05.19712495252423.09.19763532355406.09.19773827392912.12.19773529362307.02.19722666268004.12.19822375241725.07.19772397251310.02.19762168224723.07.19712711281321.11.20112411248428.04.19873309360121.09.19873230347508.02.19903373342411.04.19944295441721.07.19953263335515.10.19964940520510.06.19973994409902.02.19985955602317.09.19994365436729.03.20102761286114.10.20193123315513.08.19964768484504.09.19861843195509.12.20052778306819.05.19682319232929.08.19702540263319.08.19722508261320.08.19772814284501.08.20062783283619.08.19712040208206.05.19692050210712.07.20152311234826.06.19761490152430.07.19921632183627.11.20123016303420.08.19952410244007.02.20112647272623.10.20212443245521.06.19722306241009.10.19732179224303.02.19802396261710.07.20092298239815.08.20092667333826.08.20092595325301.01.19802421250631.03.197419642060 -
Wellbores with cores
Wellbores with cores 07.03.20092727.08.1982725.02.1983814.12.1989923.01.19908703.03.20139112.12.19772804.12.19821323.07.19712421.09.19871719.08.19711820.08.1995810.07.20095201.01.198048