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Revisiting Pyrenean Foothills Structural Imaging by Seismic Interpretation in the Shot Domain - Case Study from 2D ECORSNormal access

Authors: H. Puntous, F. Adler, C. Strobbia, E. Masini and S. Calassou
Event name: 80th EAGE Conference and Exhibition 2018
Session: Seismic Interpretation II - Interpretation and Processing
Publication date: 11 June 2018
DOI: 10.3997/2214-4609.201800994
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 786.85Kb )
Price: € 20

Summary:
The successful exploration initiated in the 1940’s in the Aquitaine basin resulted in numerous seismic acquisitions, with often limited spread, to build a good overall understanding of this thrust and fold belt. Exploration wells sometimes encountered unexpected geological structures when drilling in the Pyrenean complex foothills. This occured for the Bellevue well drilled in 1991, covered by the long offset ECORS dataset. Since interpretation of the seismic section produced by conventional processing is difficult, we propose an interpretative procedure for constructing clearer structural images from land seismic data in foothills environment by picking events directly in the shot domain. This allows us to extract on the most relevant shots, for each structure, a noise free signal to feed the migration algorithm. The final image after migration enables us to revisit the geological concept of the Bellevue well area.


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