Accurate velocity model estimation and imaging in the presence of localized attenuation (Q) anomalies
US11340366B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2019 |
| Grant date | May 24, 2022 |
| Priority date | — |
| Expiry date | Jul 30, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/66
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Iterative methods for inversion of seismic data to update a physical property model are disclosed. Such methods may comprise iteratively updating the model until a first predetermined resolution is achieved, using full wavefield inversion of the seismic data up to a first frequency threshold and assuming the seismic data is free of attenuation effects; extracting geobodies from the updated model; obtaining a Q model using the geobodies; and updating the physical property model using an inversion process, wherein the Q model is incorporated into the inversion process. These steps may be repeated until a second predetermined resolution of the physical property model is achieved, wherein the first frequency threshold is progressively increased in each repetition. The Q model may be updated with seismic data at all available frequencies to obtain a full-band Q model; and the physical property model may be updated using full-band migration and the full-band Q model.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.