System and method for investigating sub-surface features of a rock formation with acoustic sources generating coded signals
US8923092B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 9, 2011 |
| Grant date | Dec 30, 2014 |
| Priority date | — |
| Expiry date | Jun 13, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K15/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and a method for investigating rock formations includes generating, by a first acoustic source, a first acoustic signal comprising a first plurality of pulses, each pulse including a first modulated signal at a central frequency; and generating, by a second acoustic source, a second acoustic signal comprising a second plurality of pulses. A receiver arranged within the borehole receives a detected signal including a signal being generated by a non-linear mixing process from the first-and-second acoustic signal in a non-linear mixing zone within the intersection volume. The method also includes-processing the received signal to extract the signal generated by the non-linear mixing process over noise or over signals generated by a linear interaction process, or both.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.