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<datestamp>2018-01-11</datestamp>
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<title lang=en>Multi-scale X-ray tomography analysis of carbonate porosity</title>
<creator>Hebert, Vanessa</creator>
<creator>GARING, Charlotte</creator>
<creator>Luquot, Linda</creator>
<creator>Pezard, Philippe</creator>
<creator>Gouze, Philippe</creator>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Transferts en milieux poreux ; Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS) - Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>Geological Society Special Publication</source>
<identifier>hal-01174157</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01174157</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01174157</source>
<source>Geological Society Special Publication, 406, pp.61-79, 2015, Fundamental Controls on Fluid Flow in Carbonates: Current Workflows to Emerging Technologies, 〈10.1144/SP406.12〉</source>
<identifier>DOI : 10.1144/SP406.12</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1144/SP406.12</relation>
<language>en</language>
<subject>[SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
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<description lang=en>The porosity (from values of <1% up to more than 50%, with a mean value of 36.5%) and permeability (from very low values to 20.4 D, with a mean value around 800 mD) of 38 plugs, with a diameter 40 mm, have been measured. These plugs were taken approximately every 1.5 m along a 100 m-long core, sampling a series of reefal carbonate platform lithofacies. A non-unique relationship between porosity and permeability is obtained. In addition, the porosity was measured from processing X-ray micro-tomography images with resolutions ranging from 0.42 to 190.0 µm and sampling volumes ranging from less than 1 µm3 to few cm3. Depending on the structure of the pore network, the computed porosity is, in some cases, controlled by the X-ray image resolution and the sampled volume. While high resolution is required to image micro-porous material, large samples with lower resolution images are necessary for identifying distributed vugs and millimetre-scale structures. This study shows that multi-resolution X-ray micro-tomography is an effective tool for characterizing the multi-scale pore structure of carbonate rocks and understanding how it may control key petrophysical parameters such as porosity and permeability.</description>
<date>2015</date>
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