Seismic Velocities Model
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Razão de Poisson da crosta superior da região de Porangatu, Goiás, Província Tocantins: um estudo por refração sísmica
This work presents a refined seismic model of compressional waves (Vp) showing the distribution of Poisson ratio along the upper crust of central Tocantins Province, central Brazil, based on two dimensional modelling of the Porangatu seismic refraction data. The Porangatu seismic line begins in the Araguaia Belt (FXA) and continues through the western portio
Publicado em: 2006
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2. "Crustal structure of central sector of Tocantins Province by using P and S waves as well as reflected phases with deep seismic refraction data" / "Estrutura crustal do setor central da província Tocantins utilizando ondas p, s e fases refletidas com dados de refração sísmica profunda"
Esta pesquisa está baseada na execução de duas linhas de refração sísmica profunda de 300 km de extensão (L1-Porangatu e L2-Cavalcante) atravessando de oeste para leste o setor central da Província Tocantins, utilizando em cada linha 120 sismógrafos digitais e explosões com tempo controlado e cargas entre 500 e 1000 kg de explosivos a cada 50 km; f
Publicado em: 2006
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3. Velocities model attainment by CRS method / Obtenção de modelo de velocidades pelo metodo CRS
The Common Reflection Surface (CRS) method, introduced by Peter Hubral in 1997, is an alternative technique to the conventional CMP stacking. The CRS stack is able to provide not only improved simulated zero-offset sections, but also a set of parameters that convey more information of the propagating medium than the single NMO-velocity parameter of the class
Publicado em: 2005
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4. ANISOTROPY INFLUENCE ON NORMAL MOVEOUT CORRECTION IN VTI SEISMIC DATA AND VELOCITY ANALYSIS USINGGRADIENT DESCENDENT / INFLUÊNCIA DA ANISOTROPIA VTI NA CORREÇÃO DE SOBRETEMPO NORMAL EM DADOS SÍSMICOS E ANÁLISE DE VELOCIDADE POR GRADIENTE DESCENDENTE
This work quantifies the error created during seismic processing when isotropic approach is used to normal moveout correction and velocity analysis and the seismic data is anisotropic. This quantification is made by performing velocity analysis in several synthetic seismograms built from a simple (but realistic) geological model with some horizontal layers,
Publicado em: 2005
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5. PROBABILISTIC PORE PRESSURE PREDICTION IN RESERVOIR ROCKS THROUGH COMPRESSIONAL AND SHEAR VELOCITIES / PREVISÃO PROBABILÍSTICA DE PRESSÃO DE POROS EM ROCHAS RESERVATÓRIO ATRAVÉS DE VELOCIDADES COMPRESSIONAIS E CISALHANTES
This work proposes a method for pore pressure prediction in reservoir rocks through compressional- and shear-velocity data (seismic attributes). In the method, the attributes are considered observations of a physic system, which behavior depends on a several not-observable parameters, where the pore pressure is only one of these parameters. To estimate the p
Publicado em: 2005
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6. Refração Sísmica Profunda no Setor Sudeste da Província Tocantins / Deep Seismic Refraction on Southestearn Sector of the Tocantins Province
This work to fulfil the degree of Master of Sciences is inserted among the deep seismic refraction studies of the Thematic Project Geophysical Studies and Tectonic Model of the Tocantins Province Central and Southeast Sectors, Central Brazil . Three refraction lines, of around 300 km long each, were deployed, two of them in the Central sector and the other i
Publicado em: 2000