Programa de Pós-Graduação em Geofísica - CPGF/IG

URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/2355

O Programa de Pós-Graduação em Geofísica da UFPA (CPGF) do Instituto de Geociências (IG) da Universidade Federal do Pará (UFPA). Foi o segundo no Brasil a formar recursos humanos em Geofísica em nível de pós-graduação stricto sensu. Criado em 1972, funcionou até 1992 junto com os Cursos de Pós-Graduação em Geoquímica e Geologia.

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Agora exibindo 1 - 2 de 2

Acesso aberto (Open Access)
Aplicação de métodos hidroacústicos para estudo e dragagem na região portuária de Cabedelo - PB, Brasil
(Universidade Federal do Pará, 2014-11-17) LOPES, Victor Hugo Rocha; GOMES, Ellen de Nazaré Souza; http://lattes.cnpq.br/1134403454849660
This paper presents the use of hydroacoustic methods used for mapping and detection of subsurface stratigraphic features to support a project of dredging and demolishing of the left edge of the navigation channel of the Paraíba do Norte's River to expand the port zone of Cabedelo/PB. High-resolution seismic data and bathymetric data are used to map two main objectives: top of the Acoustic Rocky Basement (TARB) and the superimposed sedimentary package. This information is important to support the volume calculation of the material to be dredged and/or demolished along the navigation channel. The data analysis indicates that the expansion of the Cabedelo's Port firstly suggested by the Docas do Paraíba Company to be in the Forte Velho's locality becomes expensive due to the large volume of sedimentary and rocky material to be dredged. Thus, the Lucena region is presented as an alternative to the port expansion since presents lower volume of material to be dredged that reduces substantially the costs and time of execution of the work.
Acesso aberto (Open Access)
Verificação experimental do modelo efetivo de Hudson-Crampin para meios anisotrópicos fissurados cujo o meio de fundo apresenta isotropia transversal
(Universidade Federal do Pará, 2017-03-17) CHIBA, Bruce Fabini Franco; FIGUEIREDO, José Jadsom Sampaio de; http://lattes.cnpq.br/1610827269025210
The physical modeling of cracked media, using scaled laboratory experiments, has been used as an alternative for understanding the effect of anisotropy on the characterization of the cracked hydrocarbon reservoir. The main objective of this work was to verify experimentally the predictions of Hudson-Crampin’s effective model to cracked media. For this purpose, ultrasonic and petrophysical measurements were performed on sixteen synthetic anisotropic samples with different crack densities distributed in four groups with distincts aspect ratios (0.08, 0.20, 0.32 and 0.52). Beside theses, one sample no cracks and weak VTI ansisotropy were used as reference sample. The cracks were simulated by void spaces in the form of discs in an matrix (made with sand and cement). Related to the estimatives of velocity performed by the theoretical models, Hudson-Crampin’s model presents a better adjustment for VP and VS propagating perpendicular to the plane of cracks for the dry and saturated conditions. These estimatives became more evident in the case where the crack density and aspect ratios are low. In addition to the velocity values, our comparison was also performed in terms of Thomsen’s parameters ε, γ and δ.

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Navegando Programa de Pós-Graduação em Geofísica - CPGF/IG por Afiliação "CPRM - Companhia de Pesquisa de Recursos Minerais / Serviço Geológico do Brasil"