Method of estimating permeability using NMR diffusion measurements
US11933932B1 · kind B1 · utility
1Cited by
2References
21Claims
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Key dates
| Filing date | Apr 6, 2021 |
| Grant date | Mar 19, 2024 |
| Priority date | — |
| Expiry date | Apr 6, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention is useful for determining the permeability of a geological formation using 1H NMR diffusion measurements acquired in the laboratory and using downhole 1H NMR well logging. The current technology for obtaining formation permeability downhole using NMR is not adequate for low-permeability, unconventional source rock formations with high organic content. This new method uses laboratory 1H NMR diffusion measurements for creating continuous downhole well logs of the mobile-hydrocarbon permeability of the hydrocarbon-filled pore space of downhole geological formations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.