Modelagem sísmica de alvo exploratório em bacias paleozoicas
Seismic imaging under diabase sills is a challenge for seismic exploration in paleozoic basins, causing a raise in the explorational hazard in this region. Several factors contribute to this problem such as the high reflectivity at the interface between the top of the diabase and sediment package...
| Autor principal: | LOPES, Victor Hugo Rocha |
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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/1216 |
| Resumo: |
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Seismic imaging under diabase sills is a challenge for seismic exploration in paleozoic
basins, causing a raise in the explorational hazard in this region. Several factors contribute
to this problem such as the high reflectivity at the interface between the top of the diabase
and sediment package, short period multiples due heterogeneity in the diabase and the
scattering of energy due roughness in the topography of the diabase. To get a better
understanding about the propagation of seismic waves in this kind of environment, we
build a 3D representative acoustic model of explorational target of a paleozoic basin.
Then we insert physical properties in that model using data from wells, we simmulate 3D
and 2D acquisition using finite differences and present the results for a 2D section in the
region of greater thickness of the diabase. We describe the procedures used to build the
3D model analysing the characteristics of the data obtained by 3D seismic modelling and
the result of seismic imaging in time and in depth from a 2D section. |