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Book Chapter

Porosity and fluid flow characterization of granite by capillary wetting using X-ray computed tomography

By
Y. Géraud
Y. Géraud
Université Louis Pasteur, Ecole et Observatoire des Sciences de la Terre, Centre de Géeochimie de la Surface, UMR 7517, 1 rue Blessig, F-67084 Strasbourg cedex, France (e-mail: ygeraud@illite.u-strasbg.fr
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F. Surma
F. Surma
Université Louis Pasteur, Ecole et Observatoire des Sciences de la Terre, Centre de Géeochimie de la Surface, UMR 7517, 1 rue Blessig, F-67084 Strasbourg cedex, France (e-mail: ygeraud@illite.u-strasbg.fr
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F. Mazerolle
F. Mazerolle
CNRS, Laboratoire de Mécanique et d'Acoustique, Chemin Joseph Aiguier, F-13008 Marseille cedex 20, France
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Published:
January 01, 2003

Abstract

The porosity and transfer properties of a very low porosity material (granite) are measured. A new procedure is defined using a capillary test and X-ray computed tomography (CT) scanning. Injected volumes are very low, i.e. a few cm3 for a sample volume of 1 dm3, using a fluid/rock ratio lower than 0.1%. This technique allows monitoring of the anisotropy of fluid flow during the test. Flow along the injection direction is higher than along the perpendicular direction. Saturation depends on the specific saturation of each mineral zone. Multiscale analysis allows defining the flow conditions as being controlled at both the mineral and the sample scale. Results indicate the specific role for various constituting parts of the material. High speed flow occurs in the crack network of K-feldspar, while the storage function is localized in the reaction zone forms by quartz and muscovite.

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Contents

Geological Society, London, Special Publications

Applications of X-ray Computed Tomography in the Geosciences

F. Mees
F. Mees
Ghent University, Belgium
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R. Swennen
R. Swennen
Physico-chemical Geology, K. U. Leuven, Belgium
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M. Van Geet
M. Van Geet
SCK-CEN, Belgium
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P. Jacobs
P. Jacobs
Ghent University, Belgium
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Geological Society of London
Volume
215
ISBN electronic:
9781862394636
Publication date:
January 01, 2003

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