Propagation based electromagnetic measurement of anisotropy using transverse or tilted magnetic dipoles
US6998844B2 · kind B2 · utility
49Cited by
31References
25Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 11, 2003 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Mar 11, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Transverse or tilted magnetic dipole antenna systems are used for electromagnetic logging measurements to determine the anisotropic resistivity of subsurface formations. Combined measurements between transverse or tilted antennas, as well as axial antennas, are used to compensate for receiver antenna mismatch in the system. Some embodiments use model-based parametric inversion to estimate the anisotropic resistivity in the presence of invasion and shoulder-bed effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.