| Autor: |
Claudette Moreaux, Jean-Marie Dereppe, Roger Demeure, Isabelle Mottet |
| Rok vydání: |
1994 |
| Předmět: |
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| Zdroj: |
Magma: Magnetic Resonance Materials in Physics, Biology, and Medicine. 2:21-28 |
| ISSN: |
1352-8661 |
| Popis: |
The study of fluid displacements in porous media is of considerable interest for the oil industry as it provides a better understanding of the oil-recovery process. Consequently, fast MR imaging techniques for routine applications of sequencial analysis of large samples would be valuable. The performances of a variant of the Fast Low Angle Shot (FLASH) imaging technique called SNAP with a very short acquisition time of 144 ms per slice were evaluated on water and/or oil-filled core samples such as chalk and limestone whose linewidths were smaller than 800 Hz. The SNAP signal intensity was theoretically reviewed and inversion-recovery preweighted SNAP was used for fastT1 measurements in porous media. The images so acquired were processed using a pixel clusterization technique to segment images and roughly estimate oil and water content. This imaging method opens a new field of investigation such as the study of rapid fluid ingress or displacements. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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