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| Titel |
3-D reflection seismic imaging of the Hontomín structure in the Basque–Cantabrian Basin (Spain) |
| VerfasserIn |
J. Alcalde, D. Marti, C. Juhlin, A. Malehmir, D. Sopher, E. Saura, I. Marzán, P. Ayarza, A. Calahorrano, A. Perez-Estaun, R. Carbonell |
| 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 (2013-12-09), S.481-496 |
| Datensatznummer |
250084946
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| Publikation (Nr.) |
 copernicus.org/se-4-481-2013.pdf |
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| Zusammenfassung |
| The Basque–Cantabrian Basin of the northern Iberia Peninsula constitutes a
unique example of a major deformation system, featuring a dome structure
developed by extensional tectonics followed by compressional reactivation.
The occurrence of natural resources in the area and the possibility of
establishing a geological storage site for carbon dioxide motivated the
acquisition of a 3-D seismic reflection survey in 2010, centered on the
Jurassic Hontomín dome. The objectives of this survey were to obtain a
geological model of the overall structure and to establish a baseline model
for a possible geological CO2 storage site. The 36 km2 survey
included approximately 5000 mixed (Vibroseis and explosives) source points
recorded with a 25 m inline source and receiver spacing. The target
reservoir is a saline aquifer, at approximately 1450 m depth, encased and
sealed by carbonate formations. Acquisition and processing parameters were
influenced by the rough topography and relatively complex geology. A strong
near-surface velocity inversion is evident in the data, affecting the
quality of the data. The resulting 3-D image provides constraints on the key
features of the geologic model. The Hontomín structure is interpreted
to consist of an approximately 107 m2 large elongated dome with
two major (W–E and NW–SE) striking faults bounding it. Preliminary capacity
estimates indicate that about 1.2 Gt of CO2 can be stored in the target
reservoir. |
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