System and method for investigating sub-surface features and 3D imaging of non-linear property, compressional velocity VP, shear velocity VS and velocity ratio VP/VS of a rock formation
US9046620B2 · kind B2 · utility
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Inventors
Key dates
| Filing date | Nov 9, 2011 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Dec 29, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K15/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and a method for generating a three-dimensional image of a rock formation, compressional velocity VP, shear velocity VS and velocity ratio VP/VS of a rock formation are provided. A first acoustic signal includes a first plurality of pulses. A second acoustic signal from a second source includes a second plurality of pulses. A detected signal returning to the borehole includes a signal generated by a non-linear mixing process from the first and second acoustic signals in a non-linear mixing zone within an intersection volume. The received signal is processed to extract the signal over noise and/or signals resulting from linear interaction and the three dimensional image of is generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.