Method of building and updating an anisotropic velocity model for depth imaging of seismic data
US6864890B2 · kind B2 · utility
18Cited by
7References
12Claims
0Family size
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Key dates
| Filing date | Aug 27, 2002 |
| Grant date | Mar 8, 2005 |
| Priority date | — |
| Expiry date | Jan 4, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/303
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Conventional migration of short offset seismic data is performed. An interval velocity is obtained using, for example, check shots. An initial model of effective anellipticity parameter as a function of depth is obtained by flattening long offsets within a common image point. From these, interval anellipticity and horizontal velocity are obtained as a function of time. These initial models are used for anisotropic imaging. Any remaining residuals are used to update the interval anellipticity model and the process of migration is repeated until satisfactory results are obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.