Estimativa dos parâmetros anisotrópicos de Thomsen a partir de dados de poço: aplicação em dados do campo de Norne-Noruega
Estimate the elastic properties of anisotropic rocks in the Earth's subsurface is a task with many challenges. The main goal of this work is to estimate the Thomsen anisotropic parameters from the elastic sti ness coe cients using data from ve wells of the Norne eld, located at Norway and compare...
| Autor principal: | CASTRO, Caio Leandro Perdigão |
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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/1854 |
| Resumo: |
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Estimate the elastic properties of anisotropic rocks in the Earth's subsurface is a task with many challenges. The main goal of this work is to estimate the Thomsen anisotropic parameters from the elastic sti ness coe cients using data from ve wells of the Norne eld, located at Norway and compare the results of these parameters using the empirical method of Li with the Backus's average. Further, crack density and aspect ratio of cracks or fractures are calculated from the results of the elastic sti ness coe cients. The medium of investigation is initially considered to be isotropic and subsequently transversely isotropic, where calculations are performed and analyzed for VTI media and using an equivalence relation, converted to HTI media. The results from both methods showed similarities in estimation of anisotropic parameters, elastic sti ness coe cients, aspect ratio and fracture density. The anisotropy of the study area is weak, with some regions with moderate anisotropy. Some patterns of data obtained suggest the possibility of calculating the anisotropic parameters for the adjacent wells and interpolate the values for use in seismic processing. |