Seismic processing system and method to determine the edges of seismic data events
US6597994B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 2000 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Dec 22, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A seismic processing system and method calculates a coherency estimate for a volume of seismic data to detect edges of seismic events. The method includes selecting a portion of the seismic data volume for analysis, selecting a spatial and temporal position in the subset seismic data volume, selecting a subset of seismic samples around seismic position, placing subset seismic sample volume in a matrix, or calculating cosine of instantaneous phase of subset of seismic samples and placing those samples in a matrix, and calculating a coherency estimate for that matrix. The coherency estimate is calculated using either eigenvalue, maximum likelihood or maximum entropy analysis. The coherency estimate is then written to a coherence seismic volume and another spatial and temporal seismic sample position is selected and the process is repeated until all coherence samples are computed for the seismic data volume. Finally, the coherence seismic data volume can be examined and analyzed for useful information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.