T2-cutoff determination using magnetic susceptibility measurements
US9423365B2 · kind B2 · utility
2Cited by
12References
20Claims
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Key dates
| Filing date | Apr 4, 2012 |
| Grant date | Aug 23, 2016 |
| Priority date | — |
| Expiry date | Feb 28, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods for determining T2 cutoff are described. T2 cutoff can be derived from magnetic susceptibility measurements. By providing a depth curve of T2cutoff, improved permeability estimations from NMR can be generated. By combining a magnetic susceptibility tool and an NMR tool, a dynamic T2cutoff can then be provided, together with the standard NMR log, according to some embodiments. According to some embodiments the improved permeability estimations can be provided automatically and in real time at the wellsite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.