Time variant filter for range dependent tuning
US4628491A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1984 |
| Grant date | Dec 9, 1986 |
| Priority date | — |
| Expiry date | Mar 30, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/21
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for enhancing the resolution of true variations of a seismic signal amplitude as a function of range. A time-variant bandpass filter is impressed upon the seismic data having a bandpass frequency dependent upon the range between the seismic sources and the seismic receivers of a common depth point array of seismic sources and seismic receivers. A maximum bandpass frequency is derived from the maximum range between the seismic sources and the seismic receivers of a common depth point array of seismic sources and seismic receivers. The maximum bandpass frequency is adapted to accommodate time varying ranges as well as time varying stacking velocities so as to produce a seismic signal having enhanced resolution of amplitude variations of the seismic signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.