Browsing Institutt for geofag by Author "Jahren, Jens"
Now showing items 1-19 of 19
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Narongsirikul, Sirikarn; Mondol, Nazmul Haque; Jahren, Jens (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)This paper part one is set out to lay primary observations of experimental compaction measurements to form the basis for rock physics modelling in paper part two. P‐ and S‐wave velocities and corresponding petrophysical ...
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Baig, Irfan; Faleide, Jan Inge; Mondol, Nazmul Haque; Jahren, Jens (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)The North Sea area has been subjected to significant erosion and subsequent deposition of sediments in the basin margin and deeper basin areas, respectively, during the late Neogene. A large amount of Cretaceous-early ...
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Hansen, Henrik Nygaard; Løvstad, Kristoffer; Muller, Reidar; Jahren, Jens (Journal article / Tidsskriftartikkel / SubmittedVersion, 2017)The Stø Formation is the most important reservoir interval in the Norwegian Barents Sea, however the reservoir quality can be highly affected by the detrimental effects of quartz cement where there have been extensive post ...
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Fawad, Manzar; Mondol, MD Nazmul Haque; Baig, Irfan; Jahren, Jens (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)Rock physics analyses of data from a wildcat well 7117/9-1 drilled in the Senja Ridge area, located in the Norwegian Barents Sea, reveal changes in stiffness within the fine-grained Paleogene Sotbakken Group sediments, ...
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Line, Lina Hedvig; Müller, Reidar; Klausen, Tore Grane; Jahren, Jens; Hellevang, Helge (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)A general shift towards higher mineralogical and textural maturity changes the reservoir character across the Triassic–Jurassic transition in the southwestern Barents Sea basin (SWBSB), largely affecting the hydrocarbon ...
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Ahmadigoltapeh, Sajjad; Abdolahi, Saeed; Jahren, Jens; Miri, Rohaldin; Hellevang, Helge (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)Low salinity water (LSW) flooding has yielded promising results in improving the enhanced oil recovery (EOR) techniques in sandstone and carbonate reservoirs. Despite various studies and advances, the main mechanism behind ...
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Kalani, Mohsen; Zadeh, Mohammad Koochak; Jahren, Jens; Mondol, Nazmul Haque; Faleide, Jan Inge (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)Pore pressure in fine-grained rocks is important with respect to drilling problems such as kicks, blowouts, borehole instability, stuck pipe and lost circulation. In this study, a succession of overpressured, fine-grained, ...
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Narongsirikul, Sirikarn; Mondol, Nazmul Haque; Jahren, Jens (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)Relationship between different geomechanical and acoustic properties measured from seven laboratory tested unconsolidated natural sands with different mineralogical compositions and textures were presented. The samples ...
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Haile, Beyene Girma; Hansen, Henrik Nygaard; Aagaard, Per; Jahren, Jens (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)Chlorite-coats on quartz surfaces are ubiquitous in various sedimentary environments. Chlorite-coats shield the surface of quartz from quartz cement overgrowths, thus preserving anomalously high porosity in deeply buried ...
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Haile, Beyene Girma; Czarniecka, Urszula; Xi, Kelai; Smyrak-Sikora, Aleksandra; Jahren, Jens; Braathen, Alvar; Hellevang, Helge (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)Sedimentary basins containing igneous intrusions within sedimentary reservoir units represent an important risk in petroleum exploration. The Upper Triassic to Lower Jurassic sediments at Wilhelmøya (Svalbard) contains ...
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Rahman, Md Jamilur; Fawad, Manzar; Jahren, Jens; Mondol, Nazmul Haque (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)Characterization of caprock shale is critical in CO2 storage site evaluation because the caprock shale acts as a barrier for the injected buoyant CO2 plume. The properties of shales are complex and influenced by various ...
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Line, Lina Hedvig; Jahren, Jens; Hellevang, Helge (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)The relationship between diagenetic evolution and reservoir quality in large-scale Middle – Late Triassic aged channel systems (up to 20 km wide) in the southwestern Barents Sea is investigated through core plug data, XRD, ...
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Hansen, Henrik Nygaard; Haile, Beyene Girma; Müller, Reidar; Jahren, Jens (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)Recently, the petroleum industry has focused on deeply buried reservoir discoveries and exploring potential CO2 storage sites close to existing infrastructure to increase the life span of already operating installations ...
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Baig, Irfan; Aagaard, Per; Sassier, Caroline; Faleide, Jan Inge; Jahren, Jens; Gabrielsen, Roy H.; Fawad, Manzar; Nielsen, Lars Henrik; Kristensen, Lars; Bergmo, Per Eirik Strand (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)Regional assessment studies for CO2 storage plays have been carried out in the Norwegian-Danish Basin of the Central North Sea and in the Skagerrak-Kattegat area. The development of the reservoir models is a part of an ...
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Haile, Beyene Girma; Line, Lina Hedvig; Klausen, Tore Grane; Olaussen, Snorre; Eide, Christian Haug; Jahren, Jens; Hellevang, Helge (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)Sedimentary recycling has the potential to obscure source‐to‐sink relationships, provenance interpretations, burial history reconstructions and robust reservoir quality predictions in siliciclastic sedimentary basins. Here, ...
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Hansen, Jørgen André; Mondol, Nazmul Haque; Jahren, Jens; Tsikalas, Filippos (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)Reservoir quality assessment was conducted from petrophysical analysis and rock physics diagnostics on 15 wells penetrating Middle Jurassic sandstone reservoir formations in different regions of the eastern Central North ...
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Müller, Reidar; Klausen, Tore Grane; Line, Lena; Hafeez, A; Planke, Sverre; Eide, Frøydis; Stueland, Erik; Jahren, Jens; Rismyhr, Bjarte; Olaussen, Snorre (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)The most prolific reservoir intervals in the Barents Sea are found in the Upper Triassic to Middle Jurassic Realgrunnen Subgroup, deposited during a major change in the structural evolution of the basin which greatly ...
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Rahman, Md Jamilur; Fawad, Manzar; Jahren, Jens; Mondol, Nazmul Haque (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)Evaluating top seal integrity is crucial for successful subsurface CO2 storage. Caprock shale geomechanical properties are complex and influenced by various parameters and processes. It is challenging to understand the ...
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Koochak Zadeh, Mohammad; Mondol, Nazmul Haque; Jahren, Jens (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)This study investigates the seismic velocity anisotropy of two organic-rich shales from the Norwegian Continental Shelf. The tested organic-rich shale samples were from the Upper Jurassic Draupne and Hekkingen formations ...