Identification of stress in formations using angles of fast and slow dipole waves in borehole acoustic logging
US8004932B2 · kind B2 · utility
5Cited by
5References
19Claims
0Family size
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Key dates
| Filing date | Jan 13, 2009 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | Oct 29, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/626
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Cross-dipole measurements are obtained in a borehole. By estimating a direction of polarization of the fast shear mode at low and high frequencies and comparing the estimated distances, a cause of anisotropy is established. Formation stresses and directions may be estimated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.