Marco Cetale

Universidade Federal Fluminense

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Roger Matsumoto Moreira

Universidade Federal Fluminense

Sérgio Luiz E. F. da Silva

Universidade Federal do Rio Grande do Norte

Jorge López

Shell (Netherlands)

Felipe Capuzzo

Universidade Federal Fluminense

Felipe T. Costa

Universidade Federal Fluminense

Ammir Karsou

Universidade Federal Fluminense

A. Karsou

Polytechnic University of Turin

S.L. Da Silva

Universidade Federal Fluminense

Alexandre Maul

Petrobras (Brazil)

Djalma Manoel Soares Filho

Pontifícia Universidade Católica de Minas Gerais

Cooperative Institutions

Universidade Federal Fluminense

Petrobras (Brazil)

Universidade do Vale do Rio dos Sinos

Institute of Seismology

Alexion Pharma (Switzerland)

Reservoir Labs (United States)

Sociedade Brasileira de Geofísica

Polytechnic University of Turin

Brazilian Institute of Geography and Statistics

Shell (Netherlands)

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Weighted stacking of up-and down-going RTM images using peak signal-to-noise ratio analysis

Sérgio Luiz E. F. da Silva Ammir Karsou P. Alves Roger Matsumoto Moreira Jorge López

SIGNAL (programming language)

10.1190/image2024-4100191.1

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Seismic Imaging Using a Circular Shot OBN Geometry: Experiences and Lessons Learned

Sérgio Luiz E. F. da Silva Fábio Soares da Costa A. Karsou Felipe Capuzzo Roger Matsumoto Moreira

One shot

10.3997/2214-4609.202482024

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Data selection for velocity model estimation using a circular shot OBN survey

Felipe T. Costa Sérgio Luiz E. F. da Silva Ammir Karsou Felipe Capuzzo Roger Matsumoto Moreira

10.1190/image2023-3910079.1

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Citations (4)

Integrated Chronostratigraphic Study of the Punta del Este and Pelotas Basins

M. Cruz Hélder Oliveira H. Serratt M. Rizzi Tiago Jonatan Girelli

Summary The Punta del Este and Pelotas sedimentary basins along the South Atlantic margin of South America have gained significant attention following recent hydrocarbon discoveries in Namibia's Orange Basin. This study integrates the Punta del Este and Pelotas basins segment through a comprehensive chronostratigraphic analysis using 2D seismic data, well data, and biostratigraphic and isotopic dating. By mapping key seismic horizons, the study enables the identification of main structures and basin correlations. A large set of 2D seismic data was used in conjunction with wells and biostratigraphic data. The seismic-well tie process was carried out, making it possible to position the age markers in the seismic sections. A velocity model was created to migrate the interpreted surfaces from the time domain to depth. From surface mapping, it was possible to identify the main existing structures in the segment, understand the structure that limits the basins and identify the regions with important sedimentation of the Cretaceous interval. In summary, this study highlights the importance of integrated studies in regions such as the Punta del Este Basin - Pelotas Basin, emphasizing the need for multidisciplinary approaches to understand the geological evolution and potentiality of petroleum systems.

10.3997/2214-4609.202381023

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Suppressing 4D-noise induced by coordinate inaccuracies using a receiver-extension FWI strategy

S.L. Da Silva Roger Matsumoto Moreira Brenno Hochwart Marco Cetale

Summary This work investigates the portability of a receiver-extension full-waveform inversion (FWI) strategy to alleviate 4D noises caused by receiver coordinate inaccuracies. The receiver-extension scheme contemplates a new degree of freedom associated with the receiver positioning in the FWI procedure to decrease kinematic mismatches between modelled and observed data. We consider a realistic deepwater Brazilian pre-salt setting using a conventional ocean bottom node (OBN) acquisition by employing three different time-lapse approaches: sequential bootstrap 4D FWI (inverting the monitor data starting from the retrieved baseline model), parallel 4D FWI (conducting independent FWIs using baseline and monitor data from the same initial model), and central-difference 4D FWI (performing two sequential bootstraps FWIs). The results revealed that combining the central-difference time-lapse scheme with the receiver-extension FWI strategy provides much cleaner time-lapse estimates, mitigating non-repeatability (NR) issues associated with receiver-positing inaccuracies.

Robustness

Baseline (sea)

Repeatability

10.3997/2214-4609.2023101497

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Citations (2)

Curvelet Denoising for Preconditioning of 2D Poststack Seismic Data Inversion: Application to Data from the Marimbá Oil Field, Offshore Brazil

Pure and Applied Geophysics (2023)

Victor Martins Gomes Marco Cetale Henrique B. Santos Jörg Schleicher Amélia Novais

Curvelet

Synthetic data

10.1007/s00024-023-03278-y

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Multi-window spectrum analysis of Búzios oil field PSDM seismic data applied to frequency attenuation study

Journal of Applied Geophysics (2023)

David Fraga Freitas Marco Cetale Alberto G. Figueiredo Luiz Alberto Santos Djalma Manoel Soares Filho

Frequency band

SIGNAL (programming language)

10.1016/j.jappgeo.2023.105015

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An assessment of viscoelastic finite-difference models applied to the Brazilian pre-salt

Research Square (Research Square) (2023)

Fabrício O. A. Augusto Roger Matsumoto Moreira Marco Cetale Danielle M. Tostes Djalma Manoel Soares Filho

Abstract Viscoelastic waves are modeled using a 3D time-domain finite-difference scheme with three classical rheological models – Maxwell (M), Kelvin-Voigt (KV), Standard Linear Solid (SLS) – each of them with a single relaxation mechanism. Attenuation and dispersion effects are introduced in terms of the quality factor \textit{Q} for a certain angular frequency $\omega$. Initially, seismic attenuation of the 2D poststack seismic data from Brazilian pre-salt is evaluated through a frequency analysis. After that, numerical results are validated with analytical solutions based on a homogeneous model with constant seismic properties. The behavior of each rheological model are discussed based on phase, wave amplitude and spectrum. A simplified multilayered geological model is proposed considering regions of the poststack seismic data from the Brazilian pre-salt, Búzios field. Synthetic data are then generated for each rheological model considering two approaches in terms of \textit{Q} distribution: a constant \textit{Q} and a varying \textit{Q} per layer. Both waveform and spectra are extracted from seismograms and compared with selected regions of Búzios poststack data. The amplitude spectra confirmed that the shallowest post-salt package is more dissipative than deeper regions. Moreover, based on the analysis of synthetic data, KV and SLS models proved to be effective to mimic seismic wave propagation at Búzios field. Synthetic results also show that a \textit{Q} distribution per layer can yield a seismic attenuation behavior similar to the one observed within the data.

Seismogram

10.21203/rs.3.rs-2544314/v1

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Búzios oil field PSDM seismic spectrum analysis applied to frequency attenuation study: preliminary results

Proceeding of the 17th International Congress of the Brazilian Geophysical (2021)

David Fraga Freitas Marco Cetale Alberto Luíz Alberto De Figueiredo

Pre-salt reservoirs of Búzios oil field are overlaid by a thick and complex sedimentary packcage (3500-4000m) which causes important scattering and severe attenuation of seismic signal.The present work performs a spectral analysis of a 3D Kirchhoff Pre-Stack Depth Migration (PSDM) seismic data from Búzios field, investigating the frequency content variation vertically and horizontally, to better understand the frequency attenuation process as the seismic wave travels through the sediments from the sea bottom down to the reservoir base in this area.To perform the spectral analysis in frequency domain, the PSDM volume was converted to time domain using the same interval velocity volume used to depth-migrate the data.The variation of frequency band as the signal propagates through the sediment package was analyzed dividing a crossline section in 12 layers of 200 ms each, from sea bottom down to the base of pre-salt reservoir formations (2700 to 5000 ms).Preliminary results suggest that most part of higher frequency loss has been occurred in post-salt package, specifically from 3600 to 3800 ms.This fact may be an indication of strong viscoelastic behavior of this interval.After that, higher frequency content is lost slowly from 3800ms down to the last layer located inside pre-salt formation.Very slight frequency spectrum variation between 4200 ms to 5000 ms indicates elastic behavior of the salt formation and underling pre-salt formation in this interval.

10.22564/17cisbgf2021.072

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Seismic first arrival tomography for top salt velocity update: A case study in the Santos Basin, Brazil

P. Alves Marco Cetale Roger Matsumoto Moreira Sérgio Luiz E. F. da Silva Jorge López

Seismic Tomography

10.1190/image2024-4101257.1

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Citations (1)