Seismic exploration method and apparatus for cancelling non-uniformly distributed noise
US4890264A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1988 |
| Grant date | Dec 26, 1989 |
| Priority date | — |
| Expiry date | Mar 21, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/324
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A seismic exploration method and apparatus in which non-uniformly distributed noise signals generated by wind, machinery, or surface wave propagation and received by the sensing geophones are cancelled by the utilization of adaptive filter processing. A number of horizontally sensitive geophones are disposed along the surface of the earth to detect surface waves induced in the surface of the earth at a plurality of spaced locations throughout an entire area of investigation. Similarly, a number of wind noise and mechanical noise detectors are utilized to detect airwave and noise signals at a plurality of locations throughout the area of investigation. The outputs of the surface wave detectors, the wind noise detectors and the mechanical noise detectors may then be utilized in conjunction with an adaptive filter to effectively cancel the effects of such interferences on reflected seismic wave signals at multiple locations throughout the area of investigation so that non-uniformly distributed noise signals may be accurately eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.