Combining borehole and surface seismic data for velocity field estimation through slope tomography

Abstract : A joint traveltime and slope (or slowness) tomography method of marine surface reflections and walk-away transmitted arrivals is investigated. Based on our previous developments of 2-D isotropic slope tomography dedicated to reflection data, the transmitted arrivals are added into the inversion scheme. The results of the transmitted arrival tomography are compared to those of the joint (transmitted and reflected arrivals) tomography on synthetic data. Moreover, a quality control (QC) procedure is proposed. Finally, walk-away transmitted arrivals, surface reflected arrivals and joint tomography of both arrivals are applied on real data sets from Oseberg, North Sea. These data include 2-D surface and walk-away lines along the same direction. The resulting velocity fields are used for pre-stack depth migration, allowing us to conclude that joint inversion leads to significantly improved images both in terms of focusing and event location. A key point is that improvements are not restricted in the area covered by transmitted arrivals. As the number of available borehole receivers is small, this case study demonstrates the strong impact direct arrivals that may have on depth imaging.
Type de document :
Article dans une revue
Geophysical Journal International, Oxford University Press (OUP), 2009, 176 (3), pp.897-908. 〈10.1111/j.1365-246X.2008.04022.x〉
Liste complète des métadonnées

Littérature citée [28 références]  Voir  Masquer  Télécharger

https://hal-mines-paristech.archives-ouvertes.fr/hal-00438176
Contributeur : Véronique Lachasse <>
Soumis le : vendredi 16 juin 2017 - 15:27:03
Dernière modification le : lundi 12 novembre 2018 - 11:04:39
Document(s) archivé(s) le : mercredi 13 décembre 2017 - 13:48:37

Fichier

176-3-897.pdf
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Collections

Citation

Adam Gosselet, Soazig Le Bégat. Combining borehole and surface seismic data for velocity field estimation through slope tomography. Geophysical Journal International, Oxford University Press (OUP), 2009, 176 (3), pp.897-908. 〈10.1111/j.1365-246X.2008.04022.x〉. 〈hal-00438176〉

Partager

Métriques

Consultations de la notice

309

Téléchargements de fichiers

84