Fine-scale gas distribution in marine sediments assessed from deep-towed seismic data - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue Geophysical Journal International Année : 2014

Fine-scale gas distribution in marine sediments assessed from deep-towed seismic data

Résumé

In the context of seismic imaging of gas/gas-hydrate systems, the fine-scale structure of subseabed gas-related reflections is assessed by taking advantage of the source signature of the deep-towed high-resolution SYSIF seismic device. We demonstrate the value of an original wavelet-based method and associated multiscale seismic attributes, applied to seismic data recently acquired on the western margin of the Arctic archipelago of Svalbard. From analysis in the wavelet domain, we recognize two types of gas-related reflections associated with submetre-scale distribution of gas. We identify a thin gas-charged layer associated with an apparent normal polarity reflection, and we detect gas patches associated with a reversepolarity bright spot with frequency-dependent elastic properties at small seismic wavelengths. The results provide valuable information on the scale of features through which gas migrates and resolve ambiguities in the interpretation of the seismic data.
Fichier principal
Vignette du fichier
PL03266.pdf (800.97 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

insu-00953102 , version 1 (28-02-2014)

Identifiants

Citer

Stephan Ker, Yves Le Gonidec, Bruno Marsset, G.K. Westbrook, Dominique Gibert, et al.. Fine-scale gas distribution in marine sediments assessed from deep-towed seismic data. Geophysical Journal International, 2014, 196 (3), pp.1466-1470. ⟨10.1093/gji/ggt497⟩. ⟨insu-00953102⟩
135 Consultations
232 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More