Clay detection and quantification using downhole low frequency electromagnetic measurements
US11940588B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Jan 31, 2022 |
| Grant date | Mar 26, 2024 |
| Priority date | — |
| Expiry date | Jan 31, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and systems are provided for clay detection, clay typing, and clay volume quantification using downhole electromagnetic measurements conducted by a downhole logging tool on a formation at a low frequency less than 5000 Hz. The downhole electromagnetic measurements are used to determine permittivity data that characterizes permittivity of the formation at the low frequency less than 5000 Hz. The downhole low frequency electromagnetic measurements are nondestructive, and the results indicate it is with high sensitivity to the existence of clays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.