Determination of formation water salinity using downhole low frequency electromagnetic measurements and permittivity dispersions based thereon
US11796710B2 · kind B2 · utility
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Key dates
| Filing date | Jul 28, 2020 |
| Grant date | Oct 24, 2023 |
| Priority date | — |
| Expiry date | Mar 15, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A90/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and systems are provided for characterizing formation water salinity of subsurface formation using multifrequency permittivity data over a range of frequencies below 1 MHz. The multifrequency permittivity data is processed to determine salinity of formation water contained in the subsurface formation. Other useful formation properties (such as formation water saturation) can be determined based on the formation water salinity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.