Removing offset from seismic signals
US9618640B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 17, 2014 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Apr 21, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/324
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods, systems, and devices for conducting a seismic survey. The system includes at least one seismic sensor configured to supply a signal responsive to reflections of acoustic energy from an earth surface; and at least one processor configured to: mitigate sensor offset from a sequence of samples representative of the signal by filtering the sequence of samples using a symmetrical-in-time finite impulse response (FIR) filter. The FIR filter may approximate a sinc-in-frequency filter. The at least one processor may be configured to process the sequence of samples using a plurality of filter stages that are rectangular in time. The length of one filter stage of the plurality of filter stages may be different than the length of another filter stage of the plurality of filter stages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.