Finnmark Platform Composite Tectono-Sedimentary Element, Barents Sea

Henriksen, E.; Ktenas, Dimitrios; Nielsen, Jens Kvist

doi:10.1144/m57-2020-20

Cited by 3 publications

(2 citation statements)

References 90 publications

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“…Sediment deposition took place in a complex of rapidly subsiding basins between more stable platforms. Following the initial rift in the Visean, more intense rifting and subsidence continued during the Middle Carboniferous until the Bashkirian (Ehrenberg et al 1998(Ehrenberg et al , 2000Henriksen et al 2021). This led to fault-controlled subsidence, and the formation of depocentres along the rift axis, filled with thick Paleozoic sediments (Figs 3,6 and 7).…”

Section: Tectonic Setting Boundaries and Main Tectonic/ Erosional/dep...mentioning

confidence: 98%

Hammerfest Basin Composite Tectono-Sedimentary Element, Barents Sea

Henriksen

Kvamme²,

Rydningen

2021

Memoirs

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The Hammerfest Basin is an E -W trending graben located between the Loppa High and the Finnmark Platform in the southern part of the Norwegian Barents Sea. Mainly siliciclastic strata of Carboniferous to Cenozoic age cover the Caledonian basement and have a total estimated thickness of 5-8 km. The basin evolved through several tectonic phases: the Carboniferous rifting, Late Jurassic rifting, the opening of the Atlantic Ocean, Oligocene reorganisation of plate movements and postglacial isostatic rebound. An E-W trending dome in the centre of the basin developed during the main extensional tectonic event in Late Jurassic. Horst structures represent the main hydrocarbon traps. Erosional channels on the flanks of the basin represent entry points for Lower Cretaceous sands. For the rest of the Cretaceous and Cenozoic intervals no significant reservoir sands are expected.The first exploration well in the Barents Sea in 1980 was located in the Hammerfest basin, and by 2019 a total of 45 wells had been drilled in the basin where 34 are classified as exploration wells. The result is 18 oil and gas discoveries, which gives a discovery rate of 53%. Two fields are now in production: the Snøhvit gas-condensate fields and the Goliat oil field.A total of 340 Msm3 (2140 Mbbl) recoverable oil equivalents have been discovered. For the middle Jurassic Play, the yet-to-find potential may be around 50 Msm3, distributed in several small structures in the basin. Following the oil discovery in the Middle Triassic interval in the Goliat structure, and because several of the previously drilled structures only penetrated the Jurassic and the uppermost Triassic section, considerable exploration potential may exist in the deeper Triassic interval in structures with the best reservoir facies. Stratigraphic traps of Cretaceous age may have a moderate petroleum potential, with excellent reservoirs encountered along the flank of the basin. Exploration potential may also exist in Upper Permian sandstones along the southern and eastern flanks of the basin. However, in large parts of the basin, the remaining potential is in the deep structures and hence is gas prone.

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Section: Tectonic Setting Boundaries and Main Tectonic/ Erosional/dep...mentioning

confidence: 98%

Hammerfest Basin Composite Tectono-Sedimentary Element, Barents Sea

Henriksen

Kvamme²,

Rydningen

2021

Memoirs

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“…The Eastern Barents Sea shelf is located on a thinned continental crust and is characterised by a heterogeneous basement (Faleide et al., 2008; Gernigon et al., 2014; Henriksen, Ryseth, et al., 2011; Henriksen et al., 2024; Klitzke et al., 2019; Nikishin et al., 2019; Stoupakova, 2011; Verba et al., 2001). The age of the basement of the Eastern Barents Sea is debatable and considered to be Baikalian (Daragan‐Suschova et al., 2013; Doré et al., 2024) or Grenvillian (Korago et al., 2022; Korago & Timofeeva, 2005).…”

Section: Geological Settingsmentioning

confidence: 99%

Sequence stratigraphy and palaeogeography of the Upper Jurassic and Lower Cretaceous in the Eastern Barents Sea

Mordasova,

Stoupakova,

Suslova

et al. 2024

Basin Research

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The Upper Jurassic–Lower Cretaceous sedimentary rocks in the Eastern Barents Sea Basin are up to 2 km thick and represent one of the least studied Arctic intervals. Here, for the first time, we present a detailed analysis of 43,000 km of 2D seismic profiles, as well as well‐log and core data from 24 offshore wells with the aim to create a comprehensive sequence stratigraphic framework that can be integrated with the rest of the basin. Results show that (1) seven third‐order sequences and five types of clinoforms can be identified based on integrated seismic and well data. The age of each sequence was established based on published biostratigraphic investigations along with new dinocyst interpretations included in this study; (2) the deep marine basin was gradually filled with sediments coming from north, east and south as a response to HALIP, Canada Basin opening and Cimmerian uplift of Novaya Zemlya, and was preserved only in the south‐western part of the Barents Sea Basin at the end of Early Cretaceous and (3) both Eastern Barents Sea and West Siberia Basin share similarities in sedimentary environments and tectonic setting, though the spatial distribution of clastic reservoirs in Upper Jurassic and Lower Cretaceous mega‐sequence heavily depends on the source areas that require more provenance focused research. The results presented here can be used in further regional exploration in the area and to better understand the geodynamic evolution of the Greater Barents Sea Basin.

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Finnmark Platform Composite Tectono-Sedimentary Element, Barents Sea

Henriksen

Ktenas

Nielsen³

2021

Memoirs

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The Finnmark Platform Composite Tectono-Sedimentary Element (CTSE), located in the southern Barents Sea, is a northward-dipping monoclinal structural unit. It covers most of the southern Norwegian Barents Sea where it borders the Norwegian Mainland. Except for the different age of basement, the CTSE extends eastwards into the Kola Monocline on the Russian part of the Barents Sea.The general water depth varies between 200-350 m, and the sea bottom is influenced by Plio-Pleistocene glaciations. A high frequency of scour marks and deposition of moraine materials exists on the platform areas. Successively older strata sub-crop below the Upper Regional Unconformity (URU, which was) formed by several glacial periods.Basement rocks of Neoproterozoic age are heavily affected by the Caledonian Orogeny, and previously by the Timanide tectonic compression in the easternmost part of the Finnmark Platform CTSE.Depth to crystalline basement varies considerably and is estimated to be from 4-5 to 10 km. Following the Caledonian orogenesis, the Finnmark Platform was affected by Lower to Middle Carboniferous rifting, sediment input from the Uralian Orogen in the east, the Upper Jurassic / Lower Cretaceous rift phase and the Late Plio-Pleistocene isostatic uplift.A total of 8 exploration wells drilled different targets on the platform. Two minor discoveries have been made proving presence of both oil and gas and potential sandstone reservoirs of good quality identified in the Visean, Induan, Anisian and Carnian intervals. In addition, thick sequences of Perm-Carboniferous carbonates and spiculitic chert are proven in the eastern Platform area. The deep reservoirs are believed to be charged from Paleozoic sources. A western extension of the Domanik source rocks well documented in the Timan-Pechora Basin may exist towards the eastern part of the Finnmark Platform. In the westernmost part, charge from juxtaposed down-faulted basins may be possible.

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Finnmark Platform Composite Tectono-Sedimentary Element, Barents Sea

Cited by 3 publications

References 90 publications

Hammerfest Basin Composite Tectono-Sedimentary Element, Barents Sea

Hammerfest Basin Composite Tectono-Sedimentary Element, Barents Sea

Sequence stratigraphy and palaeogeography of the Upper Jurassic and Lower Cretaceous in the Eastern Barents Sea

Finnmark Platform Composite Tectono-Sedimentary Element, Barents Sea

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