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Abstract

Summary

This study reveals the importance of reprocessing vintage seismic data, originally focused on deep targets, in order to retrieve near-surface velocity model and structure. This information can be verified and complemented using cost-effective geophysical methods (passive seismic and audio-magnetotelluric -AMT data technique). This methodology has been applied to the Empordà Neogene basin (NE of Spain) where oil reflection datasets are available. 41 H/V stations were deployed along one seismic reflection profile to detect seismic impedance contrast between Quaternary/Neogene sediments and basement (Palaeozoic and Mesozoic). In order to calculate this contrast depth, shear-wave velocity profile has been obtained using seismic noise array technique. The final model obtained from the different seismic datasets show a basin shape with a gentle dip at the SW end of profile and an abrupt dip at the NE side interpreted as the Roses Fault. Bedrock depth reaches 660 m at the center of the profile according to H/V results. Finally, an AMT survey was undertaken at 10 sites to report a detailed 2D geoelectrical image across the Roses fault. The electrical resistivity model allows to characterize both structure and fluid properties associated with fractures network within the fault.

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/content/papers/10.3997/2214-4609.20141977
2014-09-08
2024-04-19

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References

  1. Bard, P.Y. and SESAME-Team
    , 2004. Guidelines for the implementation of the H/V spectral ratio technique on ambient vibrations-measurements, processing and interpretations, SESAME European research project EVG1-CT-2000-00026, deliverable D23.12, avalaible at http://sesame-fp5.obs.ujf-grenoble.fr
  2. Caldwell, T.G., BibbyH.M. and BrownC.
    (2004). The magnetotelluric phase tensor. Geophysics Journal International158, 457–469.
     [Google Scholar]
  3. Gabàs, A., Macau, A., Benjumea, B., Bellmunt, F., Figueras, S., and Vilà, M.
    (2013). Combination of Geophysical Methods to Support Urban Geological Mapping. Surveys in Geophysics, 1–20.
     [Google Scholar]
  4. Macau, A., Gabàs, A., Benjumea, B., Ledo, J., Queralt, P., & Figueras, S.
    (2013). Magnetotelluric and Seismic Noise Techniques Combination for the Cerdanya Basin Characterization (Eastern Pyrenees). In Near Surface Geoscience Bochum 2013.
     [Google Scholar]
  5. Rivero, L., Vilas, M., Pinto, V., and Casas, A.
    (2001) Modelización gravimétrica 2D de la fosa de l’Empordà (NE de la Península Ibérica). Acta Geológica Hispánica36 (1–2), 97–113.
     [Google Scholar]
  6. Rodi, W. and Mackie, R.
    (2001). Nonlinear conjugate gradients algorithm for 2-D magnetotelluric inversion. Geophysics66,174–187.
     [Google Scholar]
  7. Saula, E., Picart, J., Mató, E., Llenas, M., Losantos, M., Berástegui, X., Agustí, J.
    , 1996. Evolución geodinámica de la fosa del Empordà y las Sierras Transversales. Acta Geol. Hispánica29, 55–75.
     [Google Scholar]
  8. Wathelet., M.
    , (2005). Array recordings of ambient vibrations: surface-wave inversion. PhD thesis, Université de Liège, Belgium.
     [Google Scholar]
  9. Zarroca, M., Bach, J., Linares, R., & Pellicer, X. M.
    (2011). Electrical methods (VES and ERT) for identifying, mapping and monitoring different saline domains in a coastal plain region (Alt Empordà, Northern Spain). Journal of Hydrology, 409(1), 407–422.
     [Google Scholar]
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Improving Near Surface Characterization by Combining Reprocessed Vintage Seismic and Geophysical Passive Datasets
Conference Proceedings 2014, 1 (2014); https://doi.org/10.3997/2214-4609.20141977
/content/papers/10.3997/2214-4609.20141977
/content/papers/10.3997/2214-4609.20141977
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