New instrumental platform for the exploitation of the field-dependence of T 1 in rock core analysis and petroleum fluids
We propose using the latest wide bore fast field cycling NMR relaxometers for measuring the nuclear magnetic relaxation dispersion (NMRD) profiles of the logarithmic average proton-water <1/T1> in carbonate rock cores samples of 1 inch diameter and in different crude oil/brine mixings. The o...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Universitätsbibliothek Leipzig
2015
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| Subjects: | |
| Online Access: | http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-178616 http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-178616 http://www.qucosa.de/fileadmin/data/qucosa/documents/17861/diff_fund_22%282014%295.pdf |
| Summary: | We propose using the latest wide bore fast field cycling NMR relaxometers for measuring the nuclear magnetic relaxation dispersion (NMRD) profiles of the logarithmic average proton-water <1/T1> in carbonate rock cores samples of 1 inch diameter and in different crude oil/brine mixings. The observed bilogarithmic frequency behaviours of the NMRD have been interpreted with a proposed theoretical model yielding a measurement of the water local wettability at the pore surface. We have also proposed a NMR platform that uses a variable wide-bore cryogen-free superconducting magnet to acquire 2D T1-T2 correlation spectrum of a mixing of bulk water and crude oil pools. Such a T1-T2 plot allows quantitative separation of mixed bulk water and crude oil. The 2D plot does not reveal any exchange between the different and independent pools. |
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