Análise de sensibilidade da migração ao modelo de velocidades
Migration algorithms are based on ray theory aproximations or wave equation. Whatever the case, the migration velocity model must be kinematically equivalent to the velocity distribution in the subsurface. The estimation of such a velocity model in depth requires robust algorithm, mainly whe...
| Autor principal: | SILVA, Francisco Josa Coutinho |
|---|---|
| Grau: | Trabalho de Conclusão de Curso - Graduação |
| Publicado em: |
2019
|
| Assuntos: | |
| Acesso em linha: |
http://bdm.ufpa.br/jspui/handle/prefix/1721 |
| Resumo: |
|---|
|
Migration algorithms are based on ray theory aproximations or wave equation. Whatever
the case, the migration velocity model must be kinematically equivalent to the velocity
distribution in the subsurface. The estimation of such a velocity model in depth
requires robust algorithm, mainly when the medium presents strong lateral velocity variations.
In this case, the migration algorithms themselves can be used to validate the
velocity model. This work explores this approach using two migration algorithms. The
Kirchhoff migration and downward continuation migration. The theory of common image
gathers is discussed and applyed to the Marmousi synthetic data set. |