Method for downhole logging
US6842697B1 · kind B1 · utility
13Cited by
21References
15Claims
0Family size
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Key dates
| Filing date | Mar 15, 2000 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | Mar 15, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/265
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for measuring the properties such as permeability of the rock surrounding a borehole in which a directional seismic or sonic signal is generated downhole and propagated into the surrounding formation to generate an electrokinetic signal and the focus of the seismic signal is moved in three dimensions in the surrounding rock by physically moving the source or by having two seismic sources which generate oscillating seismic signals at different frequencies and the focus of the seismic signal is varied by wave interference or wave interaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.