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Comparative Imaging of Liquids in Rocks by NMR and Differential X Ray CT

Published online by Cambridge University Press:  22 February 2011

C. Jeandey
Affiliation:
LETI, division of CEA, CENG -85 X -38041 GRENOBLE
J.M. Casagrande
Affiliation:
INTERCONTROLE, CENG -85 X -38041 GRENOBLE
A. Briguet
Affiliation:
Université Claude Bernard LYON I, 69622 VILLEURBANNE
T. Ntoutoume
Affiliation:
Université Paris Sud, IEF, CNRS URA 22, 91405 ORSAY (FRANCE)
G. Guillot
Affiliation:
Université Paris Sud, IEF, CNRS URA 22, 91405 ORSAY (FRANCE)
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Abstract

We have applied NMR Imaging and X_Ray Computerized Tomography to the study of the structural properties of rocks. Samples from different porous rocks; sandstones, granites, limestones have been successively examined by both techniques. NMR images have been obtained on water saturated samples. The spatial distribution of liquid indicates the effective porosity. By constrast, X_Ray images display the mineral content of rocks. Standard tomographs do not have the required resolution to see pores smaller than 100 μm. We used water as a constrast agent to localize porosities by “differential” CT. Comparative results are shown.

Type
Research Article
Copyright
Copyright © Materials Research Society 1991

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References

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