Signal energy enhancement for seismic exploration
US5901112A · kind A · utility
Inventor
Key dates
| Filing date | Apr 11, 1994 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | Apr 11, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/375
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Harmonics, which appear with seismic reflection signals and are responsive to actual vibrations of a land-vibrator for petroleum exploration, are effectively utilized in pulse compression techniques by applying a correlation operator (CO) signal representative of the actual vibrations injected into the earth. In the invention, the CO signal may be acquired by detecting the motion of the baseplate of the land vibrator. Signal correlation procedures are then used to define an inverse filter whose output is pulse-like in response to the CO signal, and the reflected signal is applied to the inverse filter to yield a pulse compressed signal including harmonic energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.