Seismic facies/geometries of the pre-salt limestone units and newly-identified exploration trends within the Santos and Campos basins, Brazil

Kattah, Senira; Balabekov, Y.

doi:10.1190/sbgf2015-057

Cited by 3 publications

(1 citation statement)

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“…Seismic facies associated to these reservoirs during the sag and upper rift phases, comprised in the Barra Velha formation, are represented mainly by buildups, aggradational or progradational carbonate platforms, and debris (Wright, 2012;Buckley et al, 2015;Kattah and Balabekov, 2015;Saller et al, 2016;Jesus et al, 2019;Ferreira et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Neural network unsupervised classification as an advanced presalt reservoir characterization technique - a Buzios Field case study

Ferreira¹,

Lupinacci²,

Castro³

et al. 2019

Proceedings of the 16th International Congress of the Brazilian Geophysical Society&Expogef

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Section: Introductionmentioning

confidence: 99%

Neural network unsupervised classification as an advanced presalt reservoir characterization technique - a Buzios Field case study

Ferreira¹,

Lupinacci²,

Castro³

et al. 2019

Proceedings of the 16th International Congress of the Brazilian Geophysical Society&Expogef

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Presalt reservoirs of the Santos Basin: Cyclicity, electrofacies, and tectonic-sedimentary evolution

et al. 2019

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Presalt reservoirs of the Santos Basin accounted for more than 50% of Brazilian hydrocarbon production in the first two months of 2019. Its most important reservoirs are found in the Barra Velha Formation; thus understanding its genesis and geologic history is essential. This formation is composed of carbonates deposited in an alkaline lacustrine environment with a multiplicity of facies from boundstones and grainstones to mudstones. We have performed a sedimentary analysis based on the integration of sidewall core (SWC) samples and well logs from two wells coupled with seismic patterns discrimination to characterize the tectonic and depositional evolution of the Barra Velha Formation in a sector of the Outer High of the Santos Basin in this study. Our method initially consisted of the evaluation of well logs, aiming to identify shallowing and flooding upward cycles of the second and third orders for the paleoenvironmental conceptualization upper rift and sag phases. Then, we defined electrofacies through the integration of SWCs, gamma ray, and acoustic impedance logs using the crossplot approach. Finally, we described seismic patterns throughout the study area and correlated with results from well data analysis. Therefore, the Barra Velha Formation was subdivided into three zones: the lower, intermediate, and upper zones. Well 1 has a facies association characteristic of a proximal and stable environment during deposition, whereas well 2 initially presents in a distal environment sedimentation that evolves to a more proximal setting. This fact evidenced differences with respect to base-level variations indicating compartmentalization within the lacustrine environment of the upper rift and sag phase that corroborated with the detailed seismic pattern interpretation of the study area.

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Unsupervised seismic facies classification applied to a presalt carbonate reservoir, Santos Basin, offshore Brazil

et al. 2019

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Seismic facies/geometries of the pre-salt limestone units and newly-identified exploration trends within the Santos and Campos basins, Brazil

Cited by 3 publications

References 3 publications

Neural network unsupervised classification as an advanced presalt reservoir characterization technique - a Buzios Field case study

Neural network unsupervised classification as an advanced presalt reservoir characterization technique - a Buzios Field case study

Presalt reservoirs of the Santos Basin: Cyclicity, electrofacies, and tectonic-sedimentary evolution

Unsupervised seismic facies classification applied to a presalt carbonate reservoir, Santos Basin, offshore Brazil

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