Gain compensated directional propagation measurements
US9448324B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 2014 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Jul 8, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/104
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for obtaining gain compensated electromagnetic logging while drilling propagation measurements includes rotating an electromagnetic logging while drilling tool having first and second transverse transmitter antennas whose moments are orthogonal to one another and first and second transverse receiver antennas whose moments are orthogonal to one another in a subterranean wellbore. Electromagnetic voltage measurements are acquired from the first and second transverse receiver antennas while rotating. The acquired voltage measurements are processed to compute harmonic voltage coefficients. Ratios of selected ones of the harmonic voltage coefficients are in turn processed to compute a gain compensated quantity including a transverse term.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.