Method for temporal dispersion correction for seismic simulation, RTM and FWI
US10185046B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2015 |
| Grant date | Jan 22, 2019 |
| Priority date | — |
| Expiry date | Oct 1, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/679
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method for correcting seismic simulations, RTM, and FWI for temporal dispersion due to temporal finite difference methods in which time derivatives are approximated to a specified order of approximation. Computer-simulated seismic data (51) are transformed from time domain to frequency domain (52), and then resampled using a mapping relationship that maps, in the frequency domain, to a frequency at which the time derivative exhibits no temporal dispersion (53), or to a frequency at which the time derivative exhibits a specified different order of temporal dispersion. Alternatively, measured seismic data from a field survey (61) may have temporal dispersion of a given order introduced, by a similar technique, to match the order of approximation used to generate simulated data which are to be compared to the measured data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.