Method for full-bandwidth source deghosting of marine seismic streamer data
US9025413B2 · kind B2 · utility
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26Claims
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Key dates
| Filing date | Dec 7, 2009 |
| Grant date | May 5, 2015 |
| Priority date | — |
| Expiry date | Feb 20, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/56
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Seismic data recorded in a marine streamer are obtained, sorted as a common receiver gather. A complex Laplace frequency parameter is used to transform the seismic data from a space-time domain to a spectral domain. An iterative conjugate gradient scheme, using a physically-based preconditioner, is applied to the transformed seismic data, to provide a least squares solution to a normal set of equations for a source deghosting system of equations. The solution is inverse-transformed back to a space-time domain to provide source deghosted seismic data, which is useful for imaging the earth's subsurface.
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