Method and apparatus for LWD shear velocity measurement
US6930616B2 · kind B2 · utility
54Cited by
23References
33Claims
0Family size
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Key dates
| Filing date | Jan 8, 2004 |
| Grant date | Aug 16, 2005 |
| Priority date | — |
| Expiry date | Jan 19, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Array quadrupole data obtained in a LWD environment are processed to determine the shear velocity of an earth formation taking into account dispersion effects caused by the logging tool. When this processing is done in an azimuthally anisotropic formation, the shear velocity that is obtained is the slow shear velocity. When 4C (cross-dipole) data are also obtained, then both the fast and slow shear velocities of an azimuthally anisotropic formation can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.