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Seismic Subsalt Imaging with Prestack Data Enhancement Methods

Master Thesis

Description

The Levantine basin is a world class site to study the onsets of salt tectonics. A commercial data set will be processed in a conventional processing flow, as well as, several prestack data enhancement methods. These methods include (partial) Common Reflection Surface processing, Partial Time Migration and the application of a Differential Evolution CRS global search.

The dataset is masked by noise and multiples, which will be attenuated. The Kirchhoff migration from the conventional processing flow shows the best results and is compared to the commercial TGS time migration. Prestack data enhancement improves the Partial Time Migration in the presence of multiples. The shallow subsalt has been imaged. The deeper sections did not provide enough seismic energy to gain any improvement from prestack data enhancement.

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Jesper Dramsch

Geophysicist

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