Search Results - "Urai, J.L."

Argon broad ion beam tomography in a cryogenic scanning electron microscope: a novel tool for the investigation of representative microstructures in sedimentary rocks containing pore fluid by DESBOIS, G., URAI, J.L., PÉREZ‐WILLARD, F., RADI, Z., OFFERN, S., BURKART, I., KUKLA, P.A., WOLLENBERG, U.

“…Summary The contribution describes the implementation of a broad ion beam (BIB) polisher into a scanning electron microscope (SEM) functioning at cryogenic…”
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Development of crystal morphology during unitaxial growth in a progressively widening vein: II. Numerical simulations of the evolution of antitaxial fibrous veins by Hilgers, C, Koehn, D, Bons, P.D, Urai, J.L

“…The development of fibrous morphology and capability of fibres for tracking the opening trajectory were investigated using numerical simulations of a natural…”
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Effect of water on the strength and microstructure of Carrara marble axially compressed at high temperature by De Bresser, J.H.P., Urai, J.L., Olgaard, D.L.

“…In this study, we aimed to (i) answer the question if water affects the strength of marble deforming at high temperature and (ii) establish criteria that allow…”
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Variations in the morphology of porosity in the Boom Clay Formation: insights from 2D high resolution BIB-SEM imaging and Mercury injection Porosimetry by Hemes, S., Desbois, G., Urai, J.L., De Craen, M., Honty, M.

“…Boom Clay is considered as one of the potential host rocks for the disposal of high level and/or long lived radioactive waste in a geological formation in…”
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Typology, morphology and connectivity of pore space in claystones from reference site for research using BIB, FIB and cryo-SEM methods by Brémand, Fabrice, Desbois, G., Urai, J.L., Houben, M.E., Sholokhova, Y.

“…Detailed investigation of the morphology of the pore space in clay is a key factor in understanding the sealing capacity, coupled flows, capillary processes…”
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Imaging pore space in tight gas sandstone reservoir: insights from broad ion beam cross-sectioning by Brémand, Fabrice, Desbois, G., Enzmann, F., Urai, J.L., Baerle, C., Kukla, P.A., Konstanty, J.

“…Monetization of tight gas reservoirs, which contain significant gas reserves world-wide, represents a challenge for the entire oil and gas industry. The…”
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Pore morphology and distribution in the Shaly facies of Opalinus Clay (Mont Terri, Switzerland): Insights from representative 2D BIB–SEM investigations on mm to nm scale by Houben, M.E., Desbois, G., Urai, J.L.

“…We used Broad-Ion-Beam polishing in combination with Scanning Electron Microscopy to study the microstructure and porosity in the Shaly facies of Opalinus Clay…”
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A comparative study of representative 2D microstructures in Shaly and Sandy facies of Opalinus Clay (Mont Terri, Switzerland) inferred form BIB-SEM and MIP methods by Houben, M.E., Desbois, G., Urai, J.L.

“…A combination of Broad-Ion-Beam (BIB) polishing and Scanning Electron Microscopy (SEM) has been used to study qualitatively and quantitatively the…”
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Application of BIB–SEM technology to characterize macropore morphology in coal by Giffin, S., Littke, R., Klaver, J., Urai, J.L.

“…We use broad ion beam (BIB) milling to prepare low-relief polished surfaces of coal samples for high-resolution SEM imaging, in a study of the morphology and…”
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The formation of open fractures in cohesive materials, results of scaled analogue and numerical modelling on fault zone porosity development by Brémand, Fabrice, van Gent, H, Abe, S., Urai, J.L., Holland, M.

“…We compare analogue and numerical models of dilatational fractures at low confining stress. These structures form an effective conduit for fluid flow in the…”
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Large-scale natural fracture network patterns: Insights from automated mapping in the Lilstock (Bristol Channel) limestone outcrops by Prabhakaran, Rahul, Urai, J.L., Bertotti, G., Weismüller, C., Smeulders, D.M.J.

“…The Lilstock outcrop in the southern Bristol Channel provides exceptional exposures of several limestone beds displaying stratabound fracture networks,…”
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Solid bitumen in shales: Petrographic characteristics and implications for reservoir characterization by Misch, D., Gross, D., Hawranek, G., Horsfield, B., Klaver, J., Mendez-Martin, F., Urai, J.L., Vranjes-Wessely, S., Sachsenhofer, R.F., Schmatz, J., Li, J., Zou, C.

“…The presence of solid bitumen strongly affects hydrocarbon storage and expulsion from a source rock as it might either cause blockage of pore throats leading…”
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Hydrocarbon generation and migration under a large overthrust: The carbonate platform under the Semail Ophiolite, Jebel Akhdar, Oman by Grobe, A., Urai, J.L., Littke, R., Lünsdorf, N.K.

“…The Natih B source rock of the Jebel Akhdar dome in the Oman Mountains hosts at least three different generations of solid bitumen. This study presents…”
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Solid bitumen in calcite veins from the Natih Formation in the Oman Mountains: Multiple phases of petroleum migration in a changing stress field by Fink, R., Virgo, S., Arndt, M., Visser, W., Littke, R., Urai, J.L.

“…Solid bitumen in calcite veins in Natih limestone on the southern flank of the Jebel Akhdar Anticline provide evidence for at least two previously unrecognized…”
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Clay smear in normal fault zones – The effect of multilayers and clay cementation in water-saturated model experiments by Schmatz, J., Vrolijk, P.J., Urai, J.L.

“…We studied the evolution of fault zones in water-saturated model experiments consisting of sand and clay layers above a normal fault dipping 70° in a stiff…”
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Shear localisation and strain distribution during tectonic faulting—new insights from granular-flow experiments and high-resolution optical image correlation techniques by Adam, J., Urai, J.L., Wieneke, B., Oncken, O., Pfeiffer, K., Kukowski, N., Lohrmann, J., Hoth, S., van der Zee, W., Schmatz, J.

“…Brittle faults reflect a complex strain history that emerges from contrasting modes of distributed and localised deformation, and their interaction on various…”
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Impact of solid second phases on deformation mechanisms of naturally deformed salt rocks (Kuh-e-Namak, Dashti, Iran) and rheological stratification of the Hormuz Salt Formation by Závada, P., Desbois, G., Urai, J.L., Schulmann, K., Rahmati, M., Lexa, O., Wollenberg, U.

“…Viscosity contrasts displayed in flow structures of a mountain namakier (Kuh-e-Namak - Dashti), between ‘weak’ second phase bearing rock salt and ‘strong’ pure…”
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Clay-smear continuity and normal fault zone geometry – First results from excavated sandbox models by Noorsalehi-Garakani, S., Kleine Vennekate, G.J., Vrolijk, P., Urai, J.L.

“…The continuity of clay-rich fault gouge has a large effect on fluid transmissibility of faults in sand–clay sequences, but clay gouge continuity and…”
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Investigation of the morphology of pore space in mudstones—first results by Hildenbrand, A, Urai, J.L

“…A suite of selected Tertiary mudstones was studied to improve the knowledge about microstructure and related transport processes in mudstones. Samples were…”
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The development of bone-shaped structures in initially segmented layers during layer-parallel extension: numerical modelling and parameter sensitivity analysis by Kenis, I., Urai, J.L., Sintubin, M.

“…In orogenic zones the geometric occurrence of specific tectonic structures can often be related to contrasting rheological properties of rock materials. One of…”
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