Improvements of Travel-time Tomography Models from Joint Inversion of Multi-channel and Wide-angle Seismic Data.

Begovic, Slaven, Ranero, César R., Sallares, Valenti, Melendez, Adria and Grevemeyer, Ingo (2016) Improvements of Travel-time Tomography Models from Joint Inversion of Multi-channel and Wide-angle Seismic Data. Open Access [Poster] In: EGU General Assembly 2016. , 17.-22.04.2016, Vienna, Austria .

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Abstract

Commonly multichannel seismic reflection (MCS) and wide-angle seismic (WAS) data are modeled and interpreted with different approaches. Conventional travel-time tomography models using solely WAS data lack the resolution to define the model properties and, particularly, the geometry of geologic boundaries (reflectors) with the required accuracy, specially in the shallow complex upper geological layers. We plan to mitigate this issue by combining these two different data sets, specifically taking advantage of the high redundancy of multichannel seismic (MCS) data, integrated with wide-angle seismic (WAS) data into a common inversion scheme to obtain higher-resolution velocity models (Vp), decrease Vp uncertainty and improve the geometry of reflectors.
To do so, we have adapted the tomo2d and tomo3d joint refraction and reflection travel time tomography codes (Korenaga et al, 2000; Meléndez et al, 2015) to deal with streamer data and MCS acquisition geometries. The scheme results in a joint travel-time tomographic inversion based on integrated travel-time information from refracted and reflected phases from WAS data and reflected identified in the MCS common depth point (CDP) or shot gathers.

Document Type: Conference or Workshop Item (Poster)
Research affiliation: OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
Date Deposited: 03 May 2016 13:26
Last Modified: 03 May 2016 13:27
URI: http://oceanrep.geomar.de/id/eprint/32348

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