Migração em tempo: influência dos pesos para compensação de amplitude
Automatic methods for velocity model building using pre-stack migration perform better if the amplitude of events in common image gathers are equalized. For velocity analysis in time, the choice of the weight function in the Kirchhoff migration operator controls the amplitude of the migrated even...
| Autor principal: | FERREIRA, Adriano Silva |
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| Grau: | Trabalho de Conclusão de Curso - Graduação |
| Publicado em: |
2019
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| Assuntos: | |
| Acesso em linha: |
http://bdm.ufpa.br/jspui/handle/prefix/1758 |
| Resumo: |
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Automatic methods for velocity model building using pre-stack migration perform better
if the amplitude of events in common image gathers are equalized. For velocity analysis
in time, the choice of the weight function in the Kirchhoff migration operator controls the
amplitude of the migrated events. Numerical experiments evaluating five different weight
functions indicate that good amplitude equalization can be achieved using approximations
to weight functions derived from true amplitude Kirchhoff migration. Effective equalization
of amplitudes in CIGs can also be achieved through a simpler and computionally cheaper
weight function, which compensates for the obliquity factor only. |