Dual sensor signal processing method for on-bottom cable seismic wave detection
US6314371A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 2000 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Jun 21, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/56
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is disclosed for processing of dual sensor OBC data that corrects for angular incidence angle, corrects for estimated reflectivity, and combines the corrected sensor traces using an optimal diversity scaling technique. In one embodiment, the disclosed method takes seismic traces from a geophone and a hydrophone, corrects the geophone trace for the incidence angle, determines diversity filters for optimally combining the geophone and hydrophone traces, applies the diversity filters, estimates a reflectivity coefficient for the ocean bottom (potentially for different angles of reflection), scales the geophone data according to the reflectivity, and re-applies the diversity filters to obtain a combined trace. The combined trace is expected to have various artifacts eliminated, including ghosting and reverberation, and is expected to have an optimally determined signal-to-noise ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.