Blar i UiS Brage på forfatter "Zimmermann, Udo"
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An Analytical TOOLBOX for the Characterization of Chalks and Other Fine-Grained Rock Types within Enhanced Oil Recovery Research and Its Application—A Guideline
Zimmermann, Udo; Minde, Mona Wetrhus; Madland, Merete Vadla; Bredal, Tine Vigdel (Peer reviewed; Journal article, 2022-06)Analyses of fine-grained rocks like shales, cherts, and specifically chalk are challenging with regards to spatial resolution. We propose a “toolbox” to understand mineralogical alteration in chalk, especially those induced ... -
Enhancing regional scientific knowledge for the Ritland Impact Crater: Meteorite classification, mineralogical and impact shock characteristics
Olsen, Linda Cathrin (Masteroppgave/UIS-TN-IER/2020;, Master thesis, 2020-08-14)Impactites from the Cambrian aged 2,7 km diameter Ritland impact crater in southwestern Norway were studied in detail using methods such as SEM (Scanning Electron Microscope), ICP-MS geochemistry, PGE (Platinum Group ... -
Evaluation of the compositional changes during flooding of reactive fluids using scanning electron microscopy, nano-secondary ion mass spectrometry, x-ray diffraction, and whole-rock geochemistry
Zimmermann, Udo; Madland, Merete Vadla; Nermoen, Anders; Hildebrand-Habel, Tania; Bertolino, Silvana A.R.; Hiort, Aksel; Korsnes, Reidar; Audinot, Jean-Nicolas; Grysan, Patrick (Journal article; Peer reviewed, 2015-05)Outcrop chalk of late Campanian age (Gulpen Formation) from Liège (Belgium) was flooded with MgCl2 in a triaxial cell for 516 days under reservoir conditions to understand how the non-equilibrium nature of the fluids altered ... -
First age constraints of the Marmora Terrane: the missing link for Neoproterozoic geology between South America and southern Africa
Ruud, Caroline (Master thesis, 2021)The Gariep Belt stretches from the southwest of Namibia into the northwest of South America, crossing the international boarder at the Orange River. The mountain belt originates from a continent-continent collision related ... -
Hafnium isotope geochemistry on detrital zircons in Mesozoic succession of the Barents Sea to enhance the provenance knowledge of potential Hydrocarbon reservoir succession.
Støle, Lena Ivarna Lindland (Masteroppgave/UIS-TN-IPT/2017;, Master thesis, 2017-02-13)Technological advances have led to the development of various methods that allows us to more accurately pinpoint the timing of geological events using geochronology. One of the most established and acknowledged techniques ... -
High resolution heavy mineral studies from Silurian to Triassic successions exposed in the Altiplano of Bolivia (Central Andes)
Hystad, Hanna Elisabeth Laland (Masteroppgave/UIS-TN-IER/2020;, Master thesis, 2020)Heavy mineral studies play an important role in the understanding of a clastic sediment or sedimentary rock. The mineral composition of a clastic rock may reflect the provenance and sedimentological processes such as sorting ... -
High-resolution heavy mineral stratigraphy of selected Precambrian successions underlying the Nama Group in Namibia
Myhre, Alexandra Elisabeth (Masteroppgave/UIS-TN-IPT/2017;, Master thesis, 2017-07-13)This project research the provenance of Precambrian formations: Kuibis Formation, Holgat Formation, Numees Formation, Blaubeker Formation, Matchless Amphibolite, Aubures Formation, and Klein Aub Formation from Namibia. The ... -
High-resolution heavy mineral studies on “black sands” from the Nama Group (Fish River Subgroup) in Namibia – Part I
Øxnevad, Sigrid (Masteroppgave/UIS-TN-IPT/2017;, Master thesis, 2017-07)A detailed high-resolution study is applied on selected samples to decipher the provenance for these deposits. The samples analysed in the project are placer deposits (“black sands”) from the Nama Group (Fish River Subgroup) ... -
High-resolution heavy mineral studies on “black sands” from the Nama Group (Fish River Subgroup) in Namibia – Part II.
Solvang, André (Masteroppgave/UIS-TN-IPT/2017;, Master thesis, 2017-07)“Black sands” from a presumed heavy mineral placer of the Nama Group in Namibia will be studied in detail. The samples for this thesis are collected from various outcrops belonging to the Fish River Subgroup in the Nababis ... -
High-Resolution Topographic and Chemical Surface Imaging of Chalk for Oil Recovery Improvement Applications
Bredal, Tine Vigdel; Zimmermann, Udo; Madland, Merete Vadla; Minde, Mona Wetrhus; Ost, Alexander D.; Wirtz, Tom; Audinot, Jean-Nicolas; Korsnes, Reidar Inge (Peer reviewed; Journal article, 2022-03)Chalk is a very fine-grained carbonate and can accommodate high porosity which is a key characteristic for high-quality hydrocarbon reservoirs. A standard procedure within Improved Oil Recovery (IOR) is seawater-injection ... -
Micro- and nano-analyses of fracture-filling after flooding on-shore chalk with different IOR fluids
Bredal, Tine, Vigdel (Masteroppgave/UIS-TN-IER/2018;, Master thesis, 2018-06-22)Water injection into the Ekofisk-reservoir was introduced in 1987 to enhance oil recovery (EOR) dissolution and precipitation by exposing chalk to various brines at reservoir conditions, which further increased deformation ... -
Mineral replacement in long-term flooded porous carbonate rocks
Minde, Mona Wetrhus; Zimmermann, Udo; Madland, Merete Vadla; Korsnes, Reidar Inge; Schultz, Bernhard; Gilbricht, Sabine (Peer reviewed; Journal article, 2019-09)This study reports mineralogical and physical property changes linked to geo-chemical alterations processes during three ultra-long-term tri-axial tests on outcrop-chalk from Liège (Belgium). The test core plugs were flooded ... -
Mineralogical alterations in calcite powder flooded with MgCl2 to study Enhanced Oil Recovery (EOR) mechanisms at pore scale
Minde, Mona Wetrhus; Madland, Merete Vadla; Zimmermann, Udo; Egeland, Nina; Korsnes, Reidar Inge; Nakamura, Eizo; Kobayashi, Katsura; Ota, Tsutomu (Peer reviewed; Journal article, 2019)Seawater injection into chalk-reservoirs on the Norwegian Continental Shelf has increased the oil recovery and reduced seabed subsidence, but not eliminated it. Therefore, understanding rock–fluid interactions is paramount ... -
Mineralogy and geochemistry of reservoir and non-reservoir chalk from the Norwegian continental shelf
Kallesten, Emanuela Iedidia; Zimmermann, Udo; Madland, Merete Vadla; Bertolino, Silvana R.A.; Omdal, Edvard; Andersen, Pål Østebø (Peer reviewed; Journal article, 2021-05)A first and detailed study of the geochemistry and mineralogy characterizing the North Sea reservoir and non-reservoir chalk is provided in this work. The study is based on 185 cores from exploration and development wells ... -
The missing link of Rodinia break up in western South America: A petrographical, geochemical, and zircon Pb-Hf isotope study of the volcanosedimentary Chilla beds (Altiplano, Bolivia)
Bahlburg, Heinrich; Zimmermann, Udo; Matos, Ramiro; Berndt, Jasper; Jimenez, Nestor; Gerdes, Axel (Peer reviewed; Journal article, 2020)The assembly of Rodinia involved the collision of eastern Laurentia with southwestern Amazonia at ca. 1 Ga. The tectonostratigraphic record of the central Andes records a gap of ∼300 m.y. between 1000 Ma and 700 Ma, i.e., ... -
Permeability evolution in chalk linked to stress and thermochemical aspects of North Sea reservoir conditions
Kallesten, Emanuela I. (PhD thesis UiS;564, Doctoral thesis, 2020-12)The project was initiated by The National IOR Centre of Norway within the University of Stavanger and it aligns with the overall goal of the centre to improve oil recovery on the Norwegian Continental Shelf. It contributes ... -
Permeability evolution of shear failing chalk cores under thermochemical influence
Kallesten, Emanuela Iedidia; Andersen, Pål Østebø; Madland, Merete Vadla; Korsnes, Reidar Inge; Omdal, Edvard; Zimmermann, Udo (Peer reviewed; Journal article, 2020-04)Development of petroleum reservoirs, including primary depletion of the pore pressure and repressurization during water injection naturally, leads to changes in effective stresses of the formations. These changes impose ... -
Provenance of Lower Cambrian rocks in Northern Spain – U-Pb isotope ages on detrital zircons in different lithofacies
Kristjansdottir, Kolbrun Mari (Bachelor thesis, 2021)The Herrería Formation with a Lower Cambrian depositional age exposed in the Cantabrian Mountains of northern Spain is the focus of this study. The motivation of this study is related to recognized significant provenance ... -
Systematic atomic force microscopy and constraints for the determination of wettability and EOR research
Nerhus, Irene (Masteroppgave/UIS-TN-IER/2020;, Master thesis, 2020-07)A highly attractive strategy within the hydrocarbon industry is improving the percentage of recovery from the reservoirs, called Improved Oil Recovery/Enhanced Oil Recovery (IOR/EOR). The Atomic Force Microscope (AFM) is ... -
Systematic Specific Surface Area Analyses on Rocks to Implement as a Necessary, Quick, and Informative Method to Understand Geo-Mechanical Parameter in IOR Experiments
Shi Thu, Su Wen (Masteroppgave/UIS-TN-IER/2018;, Master thesis, 2018-07-11)Specific surface area (SSA) of a particle can make a major impact in understanding reservoir rock characteristics where it may indicate the possibility of fluid content. The purpose of this study is to measure and understand ...