Processes and systems to enhance illumination and resolution of seismic images using multiple reflected wavefields
US11092708B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2018 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Oct 24, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/51
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This disclosure describes processes and systems for generating a seismic image of a subterranean formation from recorded seismic data gathers obtained in a marine seismic survey of the subterranean formation. The seismic data comprises recorded pressure and vertical velocity wavefields that are used to separate the recorded pressure wavefield into upgoing and downgoing pressure wavefields. A seismic image is computed from the subterranean formation based on a product of the downgoing pressure wavefield and a migration operator applied to the upgoing pressure wavefield. The downgoing pressure wavefield is a boundary source wavefield and the upgoing pressure wavefield is boundary receiver wavefield of the migration operator. The seismic image is iteratively updated by computing a residual seismic image based on the upgoing pressure wavefield and adding the residual seismic image to the seismic image. The final seismic image displays increased illumination and reduced crosstalk artifacts compared to conventional seismic imaging techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.