Method and system for calibrating a downhole imaging tool
US9921337B2 · kind B2 · utility
1Cited by
4References
10Claims
0Family size
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Key dates
| Filing date | Jan 10, 2014 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Nov 13, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
System and methods of generating calibrated downhole images of a subterranean formation (110) surrounding a wellbore (105). The method involves placing a pad at a distance from a highly conductive surface and measuring a current between return electrodes of the pad and the highly conductive surface. The current may be used to determine a theoretic impedance of the current path, and impedance amplitude and impedance phase may be calibrated using theoretical impedance phase and theoretical impedance amplitude. Multiple standoff calibrations and temperature variation calibrations may also be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.