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of 34
pro vyhledávání: '"Lukas M. Keller"'
Autor:
Lukas M. Keller
Publikováno v:
Frontiers in Earth Science, Vol 11 (2023)
In Switzerland, the Opalinus Clay unit was chosen as host rock for a repository for nuclear waste and has recently been investigated in a deep drilling campaign at possible repository construction sites. X-ray images of drill cores were compiled into
Externí odkaz:
https://doaj.org/article/474fa8c84a014757a516fe0d32329b9f
Autor:
Lukas M. Keller
Publikováno v:
Frontiers in Earth Science, Vol 10 (2022)
The role of surface roughness of fractures in Opalinus Clay and in rocks in general is relevant in understanding the hydromechanical behavior of fractures. Two different fracture surfaces of shear fractures in the Opalinus Clay were investigated. The
Externí odkaz:
https://doaj.org/article/998d858a215a4f03871b6d700ac33ca9
Autor:
Lukas M. Keller
Publikováno v:
Oil & Gas Science and Technology-Revue d'IFP Energies nouvelles
Oil & Gas Science and Technology-Revue d'IFP Energies nouvelles, Institut Français du Pétrole, 2021, 76, pp.44. ⟨10.2516/ogst/2021027⟩
Oil & Gas Science and Technology, Vol 76, p 44 (2021)
Oil & Gas Science and Technology-Revue d'IFP Energies nouvelles, Institut Français du Pétrole, 2021, 76, pp.44. ⟨10.2516/ogst/2021027⟩
Oil & Gas Science and Technology, Vol 76, p 44 (2021)
International audience; The 3D reconstruction of the pore space in Opalinus Clay is faced with the difficulty that high-resolution imaging methods reach their limits at the nanometer-sized pores in this material. Until now it has not been possible to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b39e5fb611d81c78038692d2e6164d3b
Publikováno v:
Journal of Geophysical Research: Solid Earth. 122:5945-5955
From microstructural observations and experimental work it is known that shales consist of a mechanically weak porous fine-grained clay matrix with embedded and mechanically strong silt/sand grains. Thereby, the respective contents of weak and strong
The main aim of the present work is to estimate the effective elastic stiffnesses of a two-phase diamond/β-SiC composite thin film that is fabricated by chemical vapor deposition (CVD). The microstructure-property relation via elastic homogenization
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5412370581004aeacbc745aefaebf23
https://hdl.handle.net/11475/19425
https://hdl.handle.net/11475/19425
Autor:
Silvio B. Giger, Lukas M. Keller
Erworben im Rahmen der Schweizer Nationallizenzen (http://www.nationallizenzen.ch)
The determination of petrophysical properties such as density, porosity and mineralogical composition of the rock are key objectives in cored sections of drilling
The determination of petrophysical properties such as density, porosity and mineralogical composition of the rock are key objectives in cored sections of drilling
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06ba85e17c383c04e8390dff03c7b6a6
https://hdl.handle.net/11475/15260
https://hdl.handle.net/11475/15260
Autor:
Lukas M. Keller
Publikováno v:
GEOPHYSICS. 81:D543-D551
Regarding the storage of nuclear waste within clay rock formations requires fundamental understanding of elastic properties of this rock type with regard to the risk evaluation process. The influence of the pore geometry on elastic properties of Opal
Publikováno v:
Applied Clay Science. :134-142
The mesostructure (micro to millimeter scale) of clay rocks was considered as a two-component mixture consisting of impermeable non-clayey sand grains embedded in a permeable clay matrix. Provided that representative diffusion properties can be defin
Publikováno v:
Journal of Geophysical Research: Solid Earth. 118:2799-2812
[1] Local porosity theory in combination with percolation theory was applied to shale microstructures that were reconstructed on the basis of focused ion beam nanotomography and scanning transmission electron microscopy. This allowed characterizing p
Autor:
Andreas Züttel, Roger Wepf, Lukas M. Keller, Laura Suarez, Fabio La Mantia, Daniel Wiedenmann, Beat Münch, Benjamin Fumey, Peter Modregger, Michal Gorbar, Harald Hagendorfer, Ulrich Vogt, Bernard Grobéty, Jelena Stojadinović, Rolf Brönnimann, Lorenz Holzer
Publikováno v:
AIChE Journal. 59:1446-1457
The ion conductivity of two series of porous ceramic diaphragms impregnated with caustic potash was investigated by electrochemical impedance spectroscopy. To understand the impact of the pore structure on ion conductivity, the three-dimensional (3-D