Method for determining shear-wave velocity model for depth migration of mode-converted data
US6820010B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2003 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Apr 30, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/303
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides for a method of processing mode converted seismic data. The method comprises acquiring seismic data and determining a P-wave velocity model for the seismic data. An S-wave velocity model is determined from the P-wave velocity model. The mode converted seismic data are depth migrated forming CIP mode converted seismic data gathers. Corrected S-wave velocities are determined from near-offset data of the CIP gathers which corrects the depth migrated mode converted seismic data to the P-wave velocity model depth. A correction factor is provided and the iterating with the method quickly converges to a solution. This invention provides an efficient method of updating the shear wave velocity model for prestack depth migration of mode-converted data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.