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Abstract

Summary

Structural framework that controls the aptian sedimentation in the distal-central region of Uruguay’s offshore basins is identified and mapped in this work. In addition, its relevance from a petroleum perspective is studied. The Aptian sequence is a world-class source rock that generated 29% of the world’s hydrocarbon reserves, as well as the recent discoveries in Cretaceous reservoirs in Namibia’s Orange Basin. As a result, determining the presence and characteristics of the aptian sequence has become critical for any assessment of the petroleum potential in the passive-margin basins of the South Atlantic. Several paleo-restorations show that the Orange Basin and Uruguay offshore basins are conjugated margins generated during the Atlantic breakup (Upper Jurassic-Lower Cretaceous). Additional analogies have been developed throughout these basins, resulting in regional aptian sequence deposition on both margins. Although multiple researchers recognize the seismic facies of the Aptian sequence on Uruguay’s offshore basins, their characteristics are likely different from those deposited in the Orange Basin. This is due to the specific structural controls that allowed the development of a depocenter during Barremian-Aptian times, which contributed to marine restrictions and larger thicknesses of Aptian, both of which have important implications for the generation and accumulation of hydrocarbons offshore Uruguay.

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/content/papers/10.3997/2214-4609.202381015
2023-09-20
2025-07-19

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References

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/content/papers/10.3997/2214-4609.202381015
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Structural Controls for Marine Aptian Deposition Offshore Uruguay and Their Implications for Hydrocarbon Prospectivity
Conference Proceedings 2023, 1 (2023); https://doi.org/10.3997/2214-4609.202381015
/content/papers/10.3997/2214-4609.202381015
/content/papers/10.3997/2214-4609.202381015
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