Technical Paper: Elastic Migration for Improving Salt and Subsalt Imaging and Inversion

Society: SEG
Paper Number: 2012-791
Presentation Date: 2012


In this paper, we investigate the use of elastic migration (reverse-time migration, RTM) to improve the image of highly dipping, subsalt events. We apply acoustic and elastic RTM to two synthetic datasets, where pressure was recorded over elastic models. The elastic migration results clearly show significant improvements including increased continuity and better focusing of highly dipping subsalt events, compared to the acoustic migration results. Furthermore we explain why and how elastic migration can help subsalt imaging. Finally we show several real data examples that come from the Gulf of Mexico (GoM).

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