Abstract
The Merluza Graben and Abimael Ridge are first-order basement structures that influence not only the thickness, geometry, and shape of the salt layers, but also the distribution and geomorphology of post-salt sequences in the southern Santos Basin.The basement highs, associated with the implantation of the Abimael Ridge, interpose as a physical barrier to the salt flow, as the plastic, mobile evaporite sequences tend to occupy areas with less overburden pressure. Given that most pre-salt targets rely on evaporite layers as a sealing element, these basement structures can either favor or hamper the risk analysis of hydrocarbon prospects recognized in the area.This study focuses on the Esmeralda exploration block, offered by the Brazilian Agência Nacional de Petróleo (ANP) in 2022. It examines the impact of alternate geological interpretations on the economic evaluation of pre-salt exploratory plays in the southern Santos Basin.
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