Avaliação da adição de Nanosílica e silicato de sódio em pastas de cimento para poços de petróleo com baixo gradiente de fratura

The oil wells cementing is a critical step during the phase of well drilling, because problems during the operation of slurry pumping and an incomplete filling of the annular space between the metal casing and the formation can cause the slurry loss. Therefore, the slurry adopted in primary cementing an oil well must be properly dosed so that these problems are avoided during its pumping. When you drill a well in a weak rock formation requires even more careful, because should be a limit of hydrostatic pressure exerted during cementation, that does not occur rock collapse. With the objective of performing the cementing of a well whose formation is weak or unconsolidated are employed lighter slurries. Thus, this study used slurries with sodium silicate and nano silica in concentrations of 0,1; 0,4; 0,7 e 1,0 gpc, in which the slurries with nano silica showed the rheological parameters higher concentrations of up to 0.7 gpc and for concentration of 1.0 the slurry with sodium silicate obtained the highest values, remaining above the limits for application in fields, mainly wells with low fracture gradient, because a significant increase in viscosity may result in an increase in pressure pumping in operations of secondary cementations. Furthermore, there was no decrease in strength with increasing concentration of additive. Then, it is possible use of these additives to formulate Lighter slurry

Avaliação de desempenho no Instituto Português de Oncologia, Francisco Gentil de Lisboa

Mestrado em Gestão de Recursos Humanos

A organização do treino e do jogo no futebol de formação : relatório de estágio em futebol realizado na equipa de infantis de 11 do Grupo Desportivo Estoril Praia, Divisão de Honra da AFL, época 2014-2015

O futebol é um jogo deveras complexo e essa complexidade está presente nos processos para se atingirem os objetivos do jogo. Simplificando, estes são apenas um, marcar mais golos que o adversário e sofrer menos. É essencial que o treinador e a sua equipa técnica, construam uma estrutura que lhes permita lidar com esta complexidade, conseguindo maximizar o potencial desportivo e humano dos jogadores, quer individualmente quer coletivamente, de forma a atingirem os objetivos globais da equipa. Este relatório encontra-se dividido em três áreas fundamentais, todas elas com finalidades distintas. Na área 1 (Realização da prática profissional), o principal foco foi descrever como se desenvolveu o planeamento, a condução e a avaliação do processo de treino de uma equipa de futebol, durante a época 2014/2015. Sendo este um escalão em que os atletas se estão a iniciar no futebol de 11, procurou-se entender como se realiza o transfer do que é treinado para a competição, tendo por base o modelo de jogo definido pelo treinador. Na área 2 (Investigação e inovação), é apresentado o projeto realizado no seio do clube, que se baseava na criação de um programa de treinos específicos, com foco no treino percetivo-motor e técnico para os escalões de iniciados e juvenis. Na área 3 (Relação com a comunidade), foi desenvolvido um torneio, organizado e direcionado para os pais dos atletas, que procurava promover nestes, um sentido de solidariedade e de respeito por todos os intervenientes de um jogo de futebol (filhos, adversários, árbitros, treinadores, entre outros). Após a realização do estágio e do relatório, pode-se concluir que é essencial saber conceber e conduzir os exercícios, que tendo como base de criação o modelo de jogo definido inicialmente, permitam aos atletas maximizarem as suas capacidades aquando da competição.

Avaliação do impacto de poluentes estrogénicos em peixes

Dissertação de Mestrado, Biologia Marinha, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2015

Da curiosidade aos saberes: um projecto de (trans)formação contínua: relatório final

Pretendeu-se com este trabalho apresentar o percurso formativo, inserido no Mestrado de Educação Pré-Escolar, realizado durante o ano lectivo 2010/2011. O caminho percorrido para a concretização deste relatório final foi pautado por imensos momentos de análise, reflexão e problematização das práticas que desenvolvemos como profissionais de educação de infância, práticas essas centradas em metodologias participtivas. Reveste-se também de um intenso questionamento sobre a avaliação, cuja preocupação central nos transporta para a incessante procura de uma alternativa para a avliação, promovendo momentos de crescimento, aprendizagem e desenvolvimento pessoal e profissional.

Música no 1º ciclo na Região Autónoma da Madeira : coceção, implementação e avaliação do ESCOL'Artes

Direção de Serviços de Educação Artística e Multimédia, criada em 1980, a partir de um projeto de implementação da expressão musical e dramática no 1.º ciclo do Ensino Básico, é uma dependência da Secretaria Regional de Educação da Região Autónoma da Madeira, doravante denominada RAM, com 35 anos de trabalho no processo de introdução das artes no ensino geral. Com a sedimentação deste projeto, cedo se percebeu a necessidade de partilhar com o público e com a comunidade escolar as práticas letivas dos alunos finalistas do 1º ciclo, através de um espetáculo que é, hoje, intitulado ESCOL’Artes. O ESCOL’Artes é um espetáculo que congrega cerca de 500 crianças das várias escolas da RAM numa verdadeira simbiose das várias modalidades artísticas, a saber, Expressão Dramática, Canto Coral, Instrumental Orff, Dança e Cordofones Madeirenses. Com este trabalho de investigação-ação, procuramos evidenciar a importância deste projeto na formação artística das crianças do 1º ciclo da RAM, destacando o ESCOL’Artes como o culminar das aprendizagens realizadas ao longo do 1º CEB. Deste modo, o contexto metodológico da investigação-ação centrou-se na implementação da 3ª parte do espetáculo ESCOL’Artes “Nos trilhos da Luz”, desenvolvido com os alunos das escolas EB1/PE da Ponta do Pargo, EB1/PE Vasco da Gama Rodrigues e EB123/PE Professor Francisco Manuel Santana Barreto, no concelho da Calheta. Para fundamentar este projeto, numa primeira parte procedeu-se a uma revisão bibliográfica direcionada de forma a contextualizar / fundamentar o ensino da música a nível histórico, nacional e regional, e numa segunda parte tratou-se da conceção, implementação e avaliação do ESCOL’Artes, numa aplicação prática no funcionamento das aulas curriculares de Expressão Musical e Dramática.

Avaliação da eficácia in vivo da L-arginina na elasticidade da pele

Dissertação (mestrado)—Universidade de Brasília, Faculdade de Ciências da Saúde, Programa de Pós-Graduação em Ciências da Saúde, 2012.

Influência das tensões tectônicas na permeabilidade da formação Açu - Bacia Potiguar

The behavior of the fluid flux in oil fields is influenced by different factors and it has a big impact on the recovery of hydrocarbons. There is a need of evaluating and adapting the actual technology to the worldwide reservoirs reality, not only on the exploration (reservoir discovers) but also on the development of those that were already discovered, however not yet produced. The in situ combustion (ISC) is a suitable technique for these recovery of hydrocarbons, although it remains complex to be implemented. The main objective of this research was to study the application of the ISC as an advanced oil recovery technique through a parametric analysis of the process using vertical wells within a semi synthetic reservoir that had the characteristics from the brazilian northwest, in order to determine which of those parameters could influence the process, verifying the technical and economical viability of the method on the oil industry. For that analysis, a commercial reservoir simulation program for thermal processes was used, called steam thermal and advanced processes reservoir simulator (STARS) from the computer modeling group (CMG). This study aims, through the numerical analysis, find results that help improve mainly the interpretation and comprehension of the main problems related to the ISC method, which are not yet dominated. From the results obtained, it was proved that the mediation promoted by the thermal process ISC over the oil recovery is very important, with rates and cumulated production positively influenced by the method application. It was seen that the application of the method improves the oil mobility as a function of the heating when the combustion front forms inside the reservoir. Among all the analyzed parameters, the activation energy presented the bigger influence, it means, the lower the activation energy the bigger the fraction of recovered oil, as a function of the chemical reactions speed rise. It was also verified that the higher the enthalpy of the reaction, the bigger the fraction of recovered oil, due to a bigger amount of released energy inside the system, helping the ISC. The reservoir parameters: porosity and permeability showed to have lower influence on the ISC. Among the operational parameters that were analyzed, the injection rate was the one that showed a stronger influence on the ISC method, because, the higher the value of the injection rate, the higher was the result obtained, mainly due to maintaining the combustion front. In connection with the oxygen concentration, an increase of the percentage of this parameter translates into a higher fraction of recovered oil, because the quantity of fuel, helping the advance and the maintenance of the combustion front for a longer period of time. About the economic analysis, the ISC method showed to be economically feasible when evaluated through the net present value (NPV), considering the injection rates: the higher the injection rate, the higher the financial incomes of the final project

Avaliação da biodegradabilidade de petróleo utilizando microrganismos isolados do estuário do Rio Potengi (RN)

The oil activity in the Rio Grande do Norte State (RN) is a permanent threat to coastal ecosystems, particularly mangroves, with the possibility of oil spills. In this context, the objective of this study was to evaluate the potential resistance of the mangrove environment of a possible spill. Were selected and isolated microorganisms degrading oil by the technique of enrichment cultures and formation of a bacterial consortium. The kinetic study of the consortium was held in rotary incubator shaken at 150 rpm and 30° C. Samples were taken at intervals of 4 hours for analysis of cell concentration and surface tension. The biodegradation was monitored using two methods of respirometry: manometric (OxiTop-C ®) and conductivimetry, where the biodegradation of oil was estimated indirectly by oxygen consumption and CO2 production, respectively. Furthermore, it was used a full 2² factorial design with triplicate at central point to the runs that used the conductivimetric methodology.. The technique of enrichment cultures allowed to obtain thirteen bacterial strains. Kinetic study of the consortium, we can showed the absence of the lag phase, reaching a maximum cell concentration of 2.55 g / L at 16 h of cultivation and a reduction on surface tension. When we adopted the methodology of OxiTop-C was detected a band indicating biodegradability (1% oil v/v), however when we used the conductivimetry methodology did not observe any band that would indicate effective biodegradation. By monitoring a process of biodegradation is necessary to observe the methodology will be adopted to evaluate the biodegradation process, since for the same conditions adopted different methodologies can produce different results. The oil-degrading isolates from soils of the mangrove estuary Potengi / RN are largely to be used in bioremediation strategies of these places, in the case of a possible oil spill, or it can be used in the treatment of waste oil generated in saline environments, since they are optimized the conditions of the tests so that the efficiency of biodegradation reach the minimum level suggested by the standarts

Avaliação ecológico-econômica do manguezal de Macau/RN e a importância da aplicação de práticas preservacionistas pela indústria petrolífera local

This work presents the results of a survey in oil-producing region of the Macau City, northern coast of Rio Grande do Norte. All work was performed under the Project for Monitoring Environmental Change and the Influence of Hydrodynamic forcing on Morphology Beach Grass Fields, Serra Potiguar in Macau, with the support of the Laboratory of Geoprocessing, linked to PRH22 - Training Program in Geology Geophysics and Information Technology Oil and Gas - Department of Geology/CCET/UFRN and the Post-Graduation in Science and Engineering Oil/PPGCEP/UFRN. Within the economic-ecological context, this paper assesses the importance of mangrove ecosystem in the region of Macau and its surroundings as well as in the following investigative exploration of potential areas for projects involving reforestation and / or Environmental Restoration. At first it was confirmed the ecological potential of mangrove forests, with primary functions: (i) protection and stabilization of the shoreline, (ii) nursery of marine life, and (iii) source of organic matter to aquatic ecosystems, (iv) refuge of species, among others. In the second phase, using Landsat imagery and techniques of Digital Image Processing (DIP), I came across about 18,000 acres of land that can be worked on environmental projects, being inserted in the rules signed the Kyoto Protocol to the market carbon. The results also revealed a total area of 14,723.75 hectares of activity of shrimp production and salting that can be harnessed for the social, economic and environmental potential of the region, considering that over 60% of this area, ie, 8,800 acres, may be used in the planting of the genus Avicennia considered by the literature that the species best sequesters atmospheric carbon, reaching a mean value of 59.79 tons / ha of mangrove

Avaliação da biodessulfurização de 4-metildibenzotiofeno por Rhodococus rhodochrous (NRRL B-2149)

Crude oil has between 0.04 up to 5% of sulphur, the higher the oil the higher the sulphur levels. Sulphur usually gives problems such as corrosion in refinery, and once burnt produces SO2 that goes to atmosphere. This work aim to investigate the capacity of Rhodococcus rhodochrous (NRRL B-2149) to metabolize the model compound 4-methyldibenzotiophene (4-MDBT), to remove the sulphur and transform it in 2-hydroxybiphenyl (2-HBF) and sulphite using the 4S pathway. Kynetic runs were carried out in shaker at 120 rpm and 32°C. Samples were taken every 12h to assay substrate consume as well as cells production using HPLC. Results showed that R. rhodochrous NRRL B-2149 can use the 4S pathway in order to remove sulphur without change the carbon chain of the molecule as well as that cells and 4-MDBT affects the product formation. The production of 2-hydroxybiphenyl has interest for industry once it is a potent biocide. However, evaluation is necessary in order to obtain better results compatible with industry needs

Avaliação histopatológica do fígado de bovinos mantidos em pastagens de Brachiaria spp. provenientes de abatedouros no Brasil

Dissertação (mestrado)—Universidade de Brasília, Faculdade de Agronomia e Medicina Veterinária, Programa de Pós-Graduação em Saúde Animal, 2016.

Avaliação da ecotoxicidade de percolados em áreas de disposição de resíduos na região metropolitana de Natal/RN

Leachates are effluent produced by decomposition of solid waste, they have complex composition and can be highly toxic. Therefore such percolated liquid should be collected and treated properly to avoid environmental contamination of soil and of water bodies. The objective of this study was to evaluate the toxicity through ecotoxicological tests with Ceriodaphnia dubia (Cladocera - Crustacea) of percolated liquids generated in two different systems of municipal solid waste (MSW) disposal in the city of Natal/ RN: A Sanitary Landfill in the Metropolitan Region of Natal/ RN, and in a dump off area. Furthermore, it was evaluated the possible contamination of the underground water of the dump off area. Two monthly samples were taken at four points between the months of May/2009 and January/2010. The Point "A" corresponds to the end of the pond leachate treatment in ASRMN; The Point "B" corresponds to a containment pond at the dump. The Point "C" is an area near one of the cells of the dump off area where the leachate outcrops; The Point "D" stands for an underground water well at the area. The last point, called "E" was sampled only once and corresponds to the slurry produced by temporary accumulation of solid waste in the open area of the dump. The ecotoxicological tests, acute and chronic, followed the ABNT 13373/2005 rules, with some modifications. The samples were characterized by measuring the pH number, the dissolved oxygen (DO), the salinity, BOD5, COD, Cd, Cu, Pb, Cr, Fe, Mg, Ni, and Zn. At Point A, the average number of EC50-48h ranged between 1.0% and 2.77% (v/v), showing a high toxicity of the leachate to C.dubia in all months. To this point, positive correlations were found between the EC50- 48 with precipitation. Negative correlations were found between the EC50- 48h with salinity. At point B there was no response of the acute exposure of organisms to the test samples. At point C the EC50-48h ranged from 17.68% to 35.36% in just two months of the five ones analyzed, not correlated meaning. Point D, the EC50-48h level ranged between 12.31% and 71.27%, showed a negative correlation with, only, precipitation. Although it was observed toxicity of underground water in the Landfill Area, there was no evidence of water contamination by leachate, however, due to the toxic character of this water, additional tests should be conducted to confirm the quality of water that is used for human supply. At point E there was no acute toxicity. These results support the dangers of inappropriate disposal of MSW to water bodies due to the high toxicity of the leachate produced highlighting the necessity of places of safe confinement and a treatment system more effective to it

A política de inclusão e o percurso de formação profissional do estudante com deficiência no Instituto Federal de Educação : um estudo de caso do Campus Planaltina

Dissertação apresentada para obtenção do grau de mestre no âmbito do Mestrado em Educação Social e Intervenção Comunitária da Escola Superior de Educação do Instituto Politécnico de Santarém.

A política de inclusão e o percurso de formação profissional do estudante com deficiência no Instituto Federal de Educação : um estudo de caso do Campus Planaltina

Dissertação apresentada para obtenção do grau de mestre no âmbito do Mestrado em Educação Social e Intervenção Comunitária da Escola Superior de Educação do Instituto Politécnico de Santarém.