Aplicações da modelagem sísmica direta na calibração de decomposições espectrais e na caracterização de reservatórios em zonas de acunhamento, estudo de caso: Campo de Peregrino, Bacia de Campos-RJ

• Ano de defesa: 2017
• Autor(a) principal: Reis, Téo Paiva dos
• Outros Autores: [e-mail]
• Orientador(a): Pereira, Egberto
• Banca de defesa: Bergamaschi, Sergio , Loures, Luiz Geraldo do Carmo Lucchesi
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade do Estado do Rio de Janeiro
• Programa de Pós-Graduação: Programa de Pós-Graduação em Análise de Bacias e Faixas Móveis
• Departamento: Centro de Tecnologia e Ciências::Faculdade de Geologia
• País: Brasil
• Palavras-chave em Português: Bacia de Campos; Decomposição espectral sísmica; Interpretação de acunhamentos; Formação Carapebus; Geologia estrutural – Campos, Bacia de (RJ); Tectônica de placas – Campos, Bacia de (RJ); Geofísica – Campos, Bacia de (RJ); Método sísmico de reflexão – Campos, Bacia de (RJ); Reservatório – Campos, Bacia de (RJ)
• Palavras-chave em Inglês: Campos Basin; Seismic spectral decompostion; Pinchout interpretation; Carapebus Formation
• Área do conhecimento CNPq: CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::GEOFISICA::GEOFISICA APLICADA
• Link de acesso: http://www.bdtd.uerj.br/handle/1/16966

Seismic or geological events, when in a thinning zone and gradually reducing their thicknesses in relation to their (seismic wavelet) wave-length, tend to suffer seismic interference. This interference harms their vertical resolution capacity, as they get thinner and thinner. The seismic spectral decomposition method, rises as an additional method to go beyond the limitations of the standard seismic resolution, especially if being applied as RGB color blends. From the calibration of the spectral decomposition method through forward models (controlled models) populated with inputs (primary velocities and densities) from an applied Bayesian probabilistic seismic inversion, resulting in a synthetic seismic dataset where the method was tested. From correlations between the synthetic/controlled/calibrated seismic data results, the workflow was then applied to the real dataset of a limited area on Peregrino Field, Campos Basin, RJ. Through the proposed workflow just above, this study aims to increase the confidence level of pinch-out interpretations of this portion on the Peregrino turbiditic reservoir, and aims for an improvement on the vertical resolution limits of the seismic data of the analyzed area. As this synthetic model describes the same pinch-out thinning behavior as observed in the real seismic, it was run into a spectral decomposition workflow having its results correlated / compared to the same workflow run proposed for the real seismic and looking for the resolution increase, depositional/ erosional patterns, as well as helping the allocation of future targets in these previously non-resolsoved areas