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Salt Stratification and Least Square Migration to Improve Pre-Salt Reservoir Images: Santos Basin, Brazilian Offshore ExampleNormal access

Authors: R. Dias, J. Fonseca, A. Bulcão, B. Dias, L. Teixeira, A. Maul and F. Borges
Event name: Second EAGE/PESGB Workshop on Velocities
Session: High Contrast Media
Publication date: 04 April 2019
DOI: 10.3997/2214-4609.201900051
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 558.99Kb )
Price: € 20

Summary:
This paper presents the benefits of combining geological velocity modelling with Least-Squares Migration to generate seismic images for the Brazilian presalt reservoirs. The geological velocity modelling focus on the evaporitic salts section characterization, regarding the stratification features presented on this layer, which were incorporated in the velocity model. Results are compared with seismic images created by the velocity model with tomography – without salt stratification – and Reverse Time Migration. In addition, a quantitative comparison is made with a modelled reference horizon to analyse the depth positioning and the migrated amplitude.


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