Characterization of sedimentary rocks with a single-sided NMR instrument

Single-sided nuclear magnetic resonance (NMR) instruments are now becoming very popular due to their interesting capability of ex situ measurements and useful applications in material testing. Measurements performed on such devices, however, are very critical due to the presence of inhomogeneous rad...

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Bibliographic Details
Published in:Applied magnetic resonance 2005-12, Vol.29 (4), p.549-559
Main Authors: Maddinelli, G., Peron, E.
Format: Article
Language:English
Subjects:
Distribution functions
Editing
Magnetic fields
Magnetic properties
Material properties
Materials testing
NMR
Nuclear magnetic resonance
Porous media
Sedimentary rocks
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Summary:Single-sided nuclear magnetic resonance (NMR) instruments are now becoming very popular due to their interesting capability of ex situ measurements and useful applications in material testing. Measurements performed on such devices, however, are very critical due to the presence of inhomogeneous radio-frequency and magnetic fields. The presence of a very large static magnetic field gradient near the magnet surface could be usefully applied to exploit diffusion properties of materials. These features were investigated by combining the measurements with application of diffusion editing sequences. A significant improvement was obtained, allowing more information on the contribution of the separate fluids and possible considerations on petrophysical properties of the porous media investigated. In fact, the diffusion-relaxation distribution functions obtained allowed complete separation of the terms related to the fluids investigated. The experimental data demonstrate the feasible application of methods based on diffusion editing sequences, even in the presence of a very large magnetic field gradient, typically associated with a single-sided NMR device.
ISSN:0937-9347
1613-7507
DOI:10.1007/BF03166331