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| Titel |
Study on the limitations of travel-time inversion applied to sub-basalt imaging |
| VerfasserIn |
I. Flecha, R. Carbonell, R. W. Hobbs |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 4, no. 2 ; Nr. 4, no. 2 (2013-12-23), S.543-554 |
| Datensatznummer |
250084949
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| Publikation (Nr.) |
 copernicus.org/se-4-543-2013.pdf |
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| Zusammenfassung |
| The difficulties of seismic imaging beneath high velocity structures
are widely recognised. In this setting, theoretical analysis of
synthetic wide-angle seismic reflection data indicates that velocity
models are not well constrained. A two-dimensional velocity model was
built to simulate a simplified structural geometry given by a basaltic
wedge placed within a sedimentary sequence. This model reproduces the
geological setting in areas of special interest for the oil industry
as the Faroe-Shetland Basin. A wide-angle synthetic dataset was
calculated on this model using an elastic finite difference scheme.
This dataset provided travel times for tomographic inversions. Results
show that the original model can not be completely resolved without
considering additional information. The resolution of nonlinear
inversions lacks a functional mathematical relationship, therefore,
statistical approaches are required. Stochastic tests based on
Metropolis techniques support the need of additional information to
properly resolve sub-basalt structures. |
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