Methods for determining formation and borehole parameters using fresnel volume tomography
US7027927B2 · kind B2 · utility
29Cited by
2References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2002 |
| Grant date | Apr 11, 2006 |
| Priority date | — |
| Expiry date | Feb 19, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/48
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for determining formation slowness around a borehole are provided. The Fresnel volume concept is applied for traveltime tomography. The Fresnel volume represents a sonic wave propagation path about the borehole. The application of Fresnel volume to sonic data provides for a stable inversion and makes practical 3-D tomography. Inversion is accomplished by an iterative back-projection method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.