Deformation and failure of rock samples probed by T1 and T2 relaxation

The objective of the study was to pinpoint the effect of stress induced rock matrix alterations on NMR-wireline-log measurements by means of laboratory T1 and T2 relaxation time measurements. The research activities were subdivided into two major parts: NMR relaxation measurements on a brine saturat...

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Bibliographic Details
Published in:Magnetic resonance imaging 2003-04, Vol.21 (3-4), p.405-407
Main Authors: VAN DER ZWAAG, C. H, VELIYULIN, E, SKJETNE, T, LOTHE, A. E, HOLT, R. M, NES, O. M
Format: Article
Language:English
Subjects:
Anisotropy
Biological and medical sciences
Geologic Sediments - analysis
Magnetic Resonance Spectroscopy - methods
Medical sciences
Stress, Mechanical
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Summary:The objective of the study was to pinpoint the effect of stress induced rock matrix alterations on NMR-wireline-log measurements by means of laboratory T1 and T2 relaxation time measurements. The research activities were subdivided into two major parts: NMR relaxation measurements on a brine saturated outcrop sandstone (Red Wildmoor Sandstone) during uniaxial compressional tests and NMR relaxation measurements on artificial sandstone samples prepared with defined crack patterns. T1-measurements performed on Red Wildmoor samples during compaction showed a decrease in the mean relaxation rate 1/exp
ISSN:0730-725X
1873-5894
DOI:10.1016/S0730-725X(03)00151-6