Djalma Manoel Soares Filho

Pontifícia Universidade Católica de Minas Gerais

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André Bulcão

Petrobras (Brazil)

Luiz Alberto Santos

Universidade Federal Fluminense

Marco Antônio Cetale Santos

Universidade Federal Fluminense

Felipe Prado Loureiro

Fundação Gorceix

Luiz Landau

Universidade Federal do Rio de Janeiro

Gustavo Catão Alves

Petrobras (Brazil)

Bruno Pereira-Dias

Petrobras (Brazil)

W.J. Mansur

Universidade Federal do Rio de Janeiro

Fernanda F. Farias

Petrobras (Brazil)

Alan A. V. B. Souza

Petrobras (Brazil)

Cooperative Institutions

Petrobras (Brazil)

Universidade Federal do Rio de Janeiro

Universidade Federal Fluminense

Sociedade Brasileira de Geofísica

Brazilian Institute of Geography and Statistics

Universidade Estadual Paulista (Unesp)

Universidade de São Paulo

Universidade do Estado do Rio de Janeiro

State University of Norte Fluminense

Institute of Petroleum Geology and Geophysics

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2D frequency domain finite-difference elastic-wave modeling

Alan A. V. B. Souza André Bulcão Bruno Pereira-Dias Djalma Manoel Soares Filho Fernanda F. Farias

We present a Finite Differences implementation of the 2D elastic wave equation. Our methodology makes use of both a staggered and a rotated grid, combining the stability and low phase dispersion of the two methods. The numerical simulation is done in the frequency domain, which allows us to easily implement an efficient boundary condition (PML) and enables the simulation of many sources simultaneously. We apply a compressed sparse matrix solver (LAPACK) and a vertical/horizontal displacement formulation in order to decrease the matrix demand for the implicit method. Results show the modeled snapshots in the time and frequency domains, which can be used as input for any seismic imaging process such as migration or Full Waveform Inversion.

Finite difference

10.1190/sbgf2013-288

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Offshore data processing by WCDP method

6th International Congress of the Brazilian Geophysical Society (2003)

Roseane M. Misságia Viatcheslav Priimenko Djalma Manoel Soares Filho Andrey Kremlev Sérgio Adriano Moura Oliveira

Practical realization of the Wave Analogue of the Common Depth Point (WCDP) Method is described. It is a seismic processing data based on the strong mathematical solution of inverse scattering problem in linear approximation by multiple overlapping data. The WCDP method is tested on field data from numerous oil reservoirs. The results show high quality of WCDP profiles and stability for a wave velocity choice.

Realization (probability)

Data Processing

10.3997/2214-4609-pdb.168.arq_473

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Cálculo da matriz de tempo de trânsito por rotação de fase em meios Localmente Tranversalmente Isotrópicos (LTI)

6th International Congress of the Brazilian Geophysical Society (2005)

Marco Antônio Cetale Santos Djalma Manoel Soares Filho Paulo Léo Manassi Osório

We propose an algorithm to compute the travel time matrix of the waves with the largest energy for prestack depth migration in an anisotropic medium with polar local symmetry or locally transversally isotropic (LTI). The algorithm is based in the phase shift concept to extrapolate the wave field. The irregularities that normally appear in the travel time matrix, computed by other methods, such as, ray tracing, when the medium has large velocity variations, do not appear with the same intensity in the proposed method. The algorithm is robust and its extension to the 3D case is straightforward.

Prestack

Matrix (chemical analysis)

10.3997/2214-4609-pdb.160.sbgf326

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Phase‐shift anisotropic depth migration using controlled illumination applied to a model of the San Alberto field‐Bolivia

Marco Antônio Cetale Santos Djalma Manoel Soares Filho Paulo Léo Manassi Osório Felipe Prado Loureiro

We introduce a new scheme for depth migration in elastic vertical transverse isotropic media (VTI), using the concept of controlled illumination. In the proposed method the areal shots obtained from multicomponent records are extrapolated using phase‐shift techniques. Through the weighted addition of delayed shots we synthesize appropriate areal shots, which increases the accuracy of the seismic imaging in the area of interest. The computational cost of the present method is much lesser, when compared to the cost of migrating all the records, since only a few areal shots are necessary to image the area selected by the interpreters. The proposed method was tested on a typical numerical 2D model from the San Alberto field in Bolivia. It was possible to correct image an exploration target located underneath a thick highly tectonic deformed anisotropic shale layer, using only 3%of the computational time necessary to migrate all the shot records.

10.1190/1.2148078

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Using WCDP ("Wave Analogue Common Depth Point") to Generate Depth Interval Velocity for Migration

6th International Congress of the Brazilian Geophysical Society (2005)

Amin Murad Djalma Manoel Soares Filho J. E. Lira Danian Steinkirch de Oliveira André Bulcão

A successful prestack depth migration depends on a good depth interval velocity. The WCDP technique provides a reliable geological model after a composition based on interpretation of a series of time sections, which can be generated in a very short execution time when compared with the traditional prestack time migration. It will be discussed how this methodology works in order to obtain the geological model and the depth interval velocity field.

Prestack

10.3997/2214-4609-pdb.160.sbgf371

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A workflow for seismic imaging with quantified uncertainty

Computers & Geosciences (2020)

Carlos H. S. Barbosa Liliane Kunstmann Rômulo Montalvão Silva Charlan Dellon da Silva Alves Bruno Santana da Silva

10.1016/j.cageo.2020.104615

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An adaptive meshless parameterization for full waveform inversion

Engineering Analysis with Boundary Elements (2017)

Franciane Conceição Peters E.F. Fontes W.J. Mansur Djalma Manoel Soares Filho Cid da Silva Garcia Monteiro

Classification of discontinuities

Regularized meshless method

Regularization

Interpolation

10.1016/j.enganabound.2017.07.006

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Wavenumbers illuminated by time-domain acoustic FWI using the L1 and L2 norms

Journal of Applied Geophysics (2020)

Felipe T. Costa Marco Antônio Cetale Santos Djalma Manoel Soares Filho

Wavenumber

Broyden–Fletcher–Goldfarb–Shanno algorithm

10.1016/j.jappgeo.2019.103935

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Numerical Experiments of Full Waveform Inversion on a Typical Pre-salt Model - Part 2 - Elastic Effects

Proceedings (2014)

Bruno Pereira-Dias Alan A. V. B. Souza André Bulcão Djalma Manoel Soares Filho Fernanda F. Farias

Summary We consider the elastic effects on an acoustic full waveform inversion generated by a synthetic pre-salt model of Santos basin, Brazil. We used P/S-velocity and density models to generate shot-gathers with acoustic, elastic (isotropic), constant and variable density modelling. The comparison of the amplitudes of the shot-gathers already provides a clue to the challenges acoustic FWI may face, as acoustic modelling is not able to provide the correct amplitude for the elastic data. This test is complemented with a constant-density acoustic FWI inversion, for all the different datasets, but with the same algorithm and parameterization. FWI with acoustic data was able to retrieve the correct information of high velocity sediments in the post/pre-salt environment and the stratification of the evaporitic sequence. On the other hand, the inversion of elastic data could not properly invert anything underneath the top of salt. The comparison of the inversion results indicates a direction in which algorithm and simplifications can be done to pursue an adequate property inversion.

10.3997/2214-4609.20141219

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Modelagem Sísmica Elástica 3D: Estudo de Caso na Bacia do Amazonas

André Bulcão Djalma Manoel Soares Filho A. L. O. Gomes Johannes Schmidt N. P. Queiroz

PreviousNext No Access9th International Congress of the Brazilian Geophysical Society & EXPOGEF, Salvador, Bahia, Brazil, 11-14 September 2005Modelagem Sísmica Elástica 3D: Estudo de Caso na Bacia do AmazonasAuthors: A. BulcãoD. M. Soares FilhoA. L. O. GomesJ. SchmidtN. P. QueirozJ. C. Rosa FilhoA. BulcãoCOPPETEC/UFRJ, D. M. Soares FilhoCENPES/PETROBRAS, A. L. O. GomesPETROBRAS, J. SchmidtPETROBRAS, N. P. QueirozPETROBRAS, and J. C. Rosa FilhoPETROBRAShttps://doi.org/10.1190/sbgf2005-337 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract This paper is in Portuguese. The main focus of this work is concentrated on the Seismic Modeling schemes for 3D problems, using the Elastic Wave Equation. The computer program elaborated in this work use parallel processing resources and runs on microcomputer clusters, in order to reach the necessary computational power to operate the three-dimensional simulations concerned to the petroleum industry. Synthetic results for a velocity model with real proportions for the Amazonian basin are presented and compared with real seismic data. Keywords: seismic, elastic, modeling, 3DPermalink: https://doi.org/10.1190/sbgf2005-337FiguresReferencesRelatedDetails 9th International Congress of the Brazilian Geophysical Society & EXPOGEF, Salvador, Bahia, Brazil, 11-14 September 2005ISSN (online):2159-6832Copyright: 2005 Pages: 2274 publication data© 2005 Published in electronic format with permission by the Brazilian Geophysical SocietyPublisher:Society of Exploration Geophysicists HistoryPublished: 14 Sep 2005 CITATION INFORMATION A. Bulcão, D. M. Soares Filho, A. L. O. Gomes, J. Schmidt, N. P. Queiroz, and J. C. Rosa Filho, (2005), "Modelagem Sísmica Elástica 3D: Estudo de Caso na Bacia do Amazonas," SEG Global Meeting Abstracts : 1687-1691. https://doi.org/10.1190/sbgf2005-337 Plain-Language Summary Keywordsseismicelasticmodeling3DPDF DownloadLoading ...

10.1190/sbgf2005-337

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