In this chapter, we present a case study focused on the reprocessing of marine seismic line MS-29, acquired in 1971 in the Otranto Channel, in the South Adriatic Sea (Italy). This line crosses the channel between South Italy and Albania, a key location for understanding the geodynamics of the North Adria Plate. The work is divided into two steps. The first step consists of a modern broadband processing sequence in the time domain that allows us to overcome low fold problems inherent in vintage data and to obtain a prestack time migration seismic section. The second step focuses on velocity model building and prestack depth migration to obtain an accurate image of the subsurface. We followed a specific workflow that uses the coherence inversion technique and both layer-based and grid tomography to achieve a reliable velocity model. The reprocessing enhances the imaging of the vintage data, allowing new insight into the geological interpretation of the Otranto Channel.

Time to Depth Seismic Reprocessing of Vintage Data: a Case Study in the Otranto Channel (South Adriatic Sea)

Brancatelli, G.
;
Forlin, E.;Geletti, R.
2022

Abstract

In this chapter, we present a case study focused on the reprocessing of marine seismic line MS-29, acquired in 1971 in the Otranto Channel, in the South Adriatic Sea (Italy). This line crosses the channel between South Italy and Albania, a key location for understanding the geodynamics of the North Adria Plate. The work is divided into two steps. The first step consists of a modern broadband processing sequence in the time domain that allows us to overcome low fold problems inherent in vintage data and to obtain a prestack time migration seismic section. The second step focuses on velocity model building and prestack depth migration to obtain an accurate image of the subsurface. We followed a specific workflow that uses the coherence inversion technique and both layer-based and grid tomography to achieve a reliable velocity model. The reprocessing enhances the imaging of the vintage data, allowing new insight into the geological interpretation of the Otranto Channel.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.14083/3714
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