Inversion, migration, and imaging related to isotropic wave-mode- independent attenuation
US11360224B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2020 |
| Grant date | Jun 14, 2022 |
| Priority date | — |
| Expiry date | Jul 4, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/679
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for identifying features of a subsurface region, including: obtaining an initial physical property model and survey data for the subsurface region; identifying a current model to be the initial physical property model; and executing one or more iterations of: generating synthetic data and forward wavefields with the current model and the survey data by forward modeling with forward wave equations representing isotropic wave-mode-independent attenuation; generating adjoint wavefields with the synthetic data and the survey data by adjoint modeling with adjoint wave equations representing isotropic wave-mode-independent attenuation; computing an objective function gradient with the forward wavefields and the adjoint wavefields by solving gradient equations with the corresponding wave equations representing isotropic wave-mode-independent attenuation; computing a search direction of the objective function; searching for a possible improved model along the search direction; and updating the current model to be the possible improved model.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.