Shales
Mostrando 1-12 de 33 artigos, teses e dissertações.
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1. Influence of reactivity and mineralogical composition on instability due to the disintegration of shales from Paraíba and Ceará States, Brazil
Resumo Este trabalho teve como objetivo correlacionar a reatividade e composição mineralógica de folhelhos à sua desintegração. Para tanto, foram caracterizadas cinco amostras de folhelho das Bacias do Rio do Peixe e Araripe, localizadas nos estados brasileiros da Paraíba e Ceará e, para fins de comparação, foi utilizada uma amostra de argila bento
Cerâmica. Publicado em: 15/08/2019
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2. Evaluación reológica de fluidos de perforación base agua con nanosílice
ABSTRACT Generally, drilling fluids may be defined as fluids with a composition that can assist the generation and removal of cuttings from the borehole to the surface. They are classified according to their base as water based mud (WBM), oil based mud (OBM) or gas. Polymers, densifiers, brines, surfactants, among others are the primary components of drillin
Matéria (Rio J.). Publicado em: 19/07/2018
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3. Stratigraphic Relations of the Ipubi Formation: Siliciclastic-Evaporitic Succession of the Araripe Basin
ABSTRACT The Ipubi Formation represents the Aptian-Albian siliciclastic-evaporitic succession of Araripe Basin, NE Brazil. This succession comprises siliciclastic rocks (bituminous shales and claystones) and evaporites (gypsum and secondary anhydrite) and represents part of the lacustrine-shallow marine post-rift phase I. This study used sequence stratigraph
An. Acad. Bras. Ciênc.. Publicado em: 25/06/2018
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4. Reassessment and Relationships of †Scutatuspinosus itapagipensis (Teleostei, Clupeomorpha, †Ellimmichthyiformes) from the Neocomian of Recôncavo Basin, Northeastern Brazil
ABSTRACT Clupeomorphs are found in many assemblages of the northeastern Brazil, whose ages range from the Neocomian to Paleogene. Ten species were described. Among them †Scutatuspinosus itapagipensis, a torpedo-like fish found in shales of the Marfim Formation from Bahia, remains poorly known. At first it was positioned within †Scutatuspinosinae and indi
An. Acad. Bras. Ciênc.. Publicado em: 06/02/2017
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5. Geoquímica orgânica aplicada à formação Irati, área de Herval, Rio Grande do Sul (RS), bacia do Paraná / Organic geochemistry applied to Irati formation, Herval area of Rio Grande do Sul, Paraná basin
The current research had the main focus on the geochemical study of a borehole in the Parana Basin at Herval city (RS), aiming to fill some gaps in the organic geochemistry of the Irati Formation. Ten chemical-stratigraphic units were defined from analytical data of Total Organic Carbon (TOC), total sulfur, insoluble residue, gamma-rays, isotopes of organic
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/05/2011
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6. EXPERIMENTAL EVALUATION OF TRANSPORT PARAMETERS IN SHALES / AVALIAÇÃO EXPERIMENTAL DOS PARÂMETROS DE TRANSPORTE EM FOLHELHOS
The majority of the problems related to wellbore stability occur when argillaceous rocks, such as shales, are drilled. Such problems are believed, in general, to be caused by the physical-chemical interaction between drilling fluids and the referred rocks. This dissertation focuses on the experimental study of the behavior of shales exposed to different sali
Publicado em: 2010
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7. Análise da deformação pós-Rifte na Bacia do Araripe, Nordeste do Brasil
The Araripe Basin is located over Precambrian terrains of the Borborema Province, being part of Northeast Brazil inner basins. Its origin is related to the fragmentation of the Gondwana supercontinent and consequently opening of South Atlantic during early Cretaceous. The basin has a sedimentary infill encompassing four distinct evolution stages, comprising
Publicado em: 2010
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8. Avaliação das condições química e física dos sedimentos do estuário Jundiaí-Potengi
The aim of this study was to quantify the presence of major and minor elements in the sediments of the Jundiaí-Potengi estuary, bordering the municipalities of Macaíba, Natal and São Gonçalo do Amarante in the state of Rio Grande do Norte, Brazil, considering the evidence of anthropic activity along this estuary, resulting in pollution by treated and unt
Publicado em: 2009
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9. Distribuição de radionuclídeos em um afloramento de sedimentos permianos da formação Iratí na Bacia do Paraná
The objective of this work is to study natural radionuclides in sedimentary rocks. The concentration of them reflects the origin of the sediments, the deposicional environment as well as some mineralogical characteristics of the rock matrix, and also more recent events as weathering and erosion. Using gama ray high resolution spectrometry, the profile of act
Publicado em: 2008
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10. Fatores condicionantes na gênese dos argilominerais dos folhelhos negros e pelitos associados da formação Irati no norte da bacia do Paraná
The Permian Irati Formation has an extensive distribution in the Paraná basin, and is frequently intruded by diabase sills. The heterogeneous geometry of the basin in the depositional time propitiated the development of different sedimentary facies in this unit and favored the deposition of terrigenous rocks in the south portion of the basin and carbonate a
Publicado em: 2008
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11. EVOLUÇÃO TECTONOSSEDIMENTAR DA BACIA DOS PARECIS AMAZÔNIA
The Parecis basin is located in central-western Brazil, on the southwestern part of the Amazon craton, between the Rondônia and Guaporé fold belts. From west to east, the Parecis basin can be divided into three tectono-sedimentary domains: a tectonic low to the west, a central compartment characterized by a negative gravimetric anomaly, and a interior sag
Publicado em: 2007
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12. High resolution stratigraphy and organic geochemistry of the Tremembé formation, tertiary of the Taubaté Basin, in the region of Taubaté-Tremembé-SP. / Estratigrafia de alta resolução e geoquímica orgânica da formação Tremembé, terciário da bacia de Taubaté, na região de Taubaté-Tremembé-SP.
This work is about the study of the high-resolution stratigraphy and organic geochemistry of the Tremembé Formation, in the Taubaté Sedimentary Basin-SP, of Cenozoic age. This work is based on the Total Organic Carbon contents (TOC), total sulphur contents and Insoluble Residue contents (IR), Rock-Eval pyrolysis data as well as the results of gamma rays sp
Publicado em: 2007