Paper submitted to IMAGE 2026, by Eric Camarda, Cesar Ricardez, Fernando Nunes, David Cavalin, Richard Huang, Alex Cruz, Khaled Abdelaziz, Junyong Chang, Sangwon Ham (TGS) Christina Tapia, Maddie Bishop, Nigel Hicks (Arena Energy).
Abstract
Removing both short-period and long-period multiples from complex seismic data acquired in very shallow water requires the pragmatic application of a suite of demultiple tools. In this paper we show an example of water bottom demultiple, which was performed on a shallow water OBS survey with an average receiver depth of 20m. A dual model approach was utilized for multiple subtraction, using both a modelled water-layer and wave equation multiple model. Importantly, separated wavefield imaging technology is used to create a shallow section image which is the key to obtaining a good result in the wave-equation demultiple model creation. Special care is taken to preserve low frequency energy in the subtraction process.
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