Made available in DSpace on 2014-12-17T15:26:38Z (GMT). No. of bitstreams: 1 Patricia Borchardt Santos.pdf: 378137 bytes, checksum: e27ccc5c056aa17d7bd2ca2c8b64458f (MD5) Previous issue date: 2009-12-01 / We presented in this work two methods of estimation for accelerated failure time models with random e_ects to process grouped survival data. The _rst method, which is implemented in software SAS, by NLMIXED procedure, uses an adapted Gauss-Hermite quadrature to determine marginalized likelihood. The second method, implemented in the free software R, is based on the method of penalized likelihood to estimate the parameters of the model. In the _rst case we describe the main theoretical aspects and, in the second, we briey presented the approach adopted with a simulation study to investigate the performance of the method. We realized implement the models using actual data on the time of operation of oil wells from the Potiguar Basin (RN / CE). / Apresentamos neste trabalho dois m?todos de estima??o para modelos de tempo de falha acelerado com efeito aleat?rio para tratar de dados de sobreviv?ncia correlacionados. O primeiro m?todo, que est? implementado no software SAS, atrav?s do procedimento NLMIXED, utiliza a quadratura Gauss-Hermite adaptada para obter a verossimilhan?a marginalizada. O segundo m?todo, implementado no software livre R, est? baseado no m?todo da verossimilhan?a penalizada para estimar os par?metros do modelo. No primeiro caso descrevemos os principais aspectos te?ricos e, no segundo, apresentamos brevemente a abordagem adotada juntamente com um estudo de simula??o para investigar a performance do m?todo. Realizamos uma aplica??o dos modelos usando dados reais sobre o tempo de funcionamento de po?os petrol?feros da Bacia Potiguar (RN/CE).

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-01-03T18:22:02Z No. of bitstreams: 1 MailonAguimarDeLima_DISSERT.pdf: 3743613 bytes, checksum: 911a3282aa7d96570ceed7a71f46c803 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-01-04T20:51:24Z (GMT) No. of bitstreams: 1 MailonAguimarDeLima_DISSERT.pdf: 3743613 bytes, checksum: 911a3282aa7d96570ceed7a71f46c803 (MD5) / Made available in DSpace on 2017-01-04T20:51:24Z (GMT). No. of bitstreams: 1 MailonAguimarDeLima_DISSERT.pdf: 3743613 bytes, checksum: 911a3282aa7d96570ceed7a71f46c803 (MD5) Previous issue date: 2016-01-29 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Atualmente, estima-se que a produ??o mundial de algod?o atinja uma marca superior a 26 milh?es de toneladas. Destas, cerca de 8% torna-se res?duo, o qual ? descartado de maneira inapropriada, resultando em problemas ambientais. Neste contexto, estudos visando o reaproveitamento destes res?duos, tornam-se vi?veis tanto no contexto ambiental, quanto no contexto econ?mico. Assim, o objetivo deste trabalho ? de avaliar a influ?ncia da adi??o de diferentes teores e tamanhos de res?duo de fibra de algod?o gerado a partir do processo de lixamento: res?duo cru e funcionalizado, como material de refor?o em matrizes de cimento CPP Classe Especial para po?os de petr?leo. A funcionaliza??o da fibra foi feita com o polieletr?lito poli dialil dimetil am?nio (PDDACl), atrav?s da imer??o desta em solu??o contendo 5% em massa de PDDACl com rela??o a massa do res?duo, a 70?C por 30 minutos. O material foi filtrado e secado em estufa. Foram realizados ensaios de TGA/DSC, FTIR, MEV e DRX para caracterizar a fibra crua e funcionalizada, al?m do emprego da t?cnica de colorimetria para aferir a efetiva funcionaliza??o da fibra. Avaliou-se tamb?m a resist?ncia da fibra ao meio alcalino simulando o pH da pasta de cimento. Testes de resist?ncia ? tra??o por compress?o diametral foram executados com o objetivo de avaliar a intera??o do res?duo com a matriz.Utilizou-se o ensaio de resist?ncia ? tra??o por compress?o diametral (TCD) para avaliar o efeito das fibras no comportamento mec?nico da matriz de cimento. Avaliou-se o tipo da fibra: crua ou funcionalizada; concentra??o: 0,5 e 1,0% e granulometria: grosso (retido em 14 mesh) e fino (passante em 28 mesh) em matrizes de cimento com 7 dias de cura. A caracteriza??o apontou que o res?duo ? constitu?do quase que exclusivamente por celulose, al?m de ser altamente resistente ao meio alcalino. An?lises colorim?tricas, ap?s tingimento e lavagem do res?duo, e Imagens SEM, demonstraram que o PDDACl aderiu-se de fato ? superf?cie do res?duo por adsor??o f?sica. Os resultados dos ensaios de TCD apontam que o ganho de resist?ncia ? proporcional a concentra??o de res?duo celul?sico utilizado. O res?duo de menor tamanho tamb?m apresentou melhores resultados. Para o res?duo funcionalizado, o teor de 0,5% resultou em perda das propriedades mec?nicas, em contrapartida, o uso de 1% do res?duo funcionalizado apresentou os melhores resultados. / Currently, is estimated that world?s cotton production reaches a top brand up to 26 million tons. Of these, about 8% becomes waste, which is disposed improperly, resulting in environmental problems. In this context, studies aiming the reutilization of this waste, become viable both in the environmental context as in economic context. So the aim of this study is to evaluate the influence of the addition of different contents and sizes of cotton fiber waste generated from the sanding process: raw and functionalized waste, as reinforcement material in cement matrices CPP Special Class for oil wells. The fiber functionalization was made with the polyelectrolyte poly diallyl dimethyl ammonium (PDDACl) by imer??o the waste in a solution containing 5% of PDDACl by mass of fiber, at 70 ?C, for 30 minutes. The material was filtered and dried in an oven. TGA/DSC, FTIR, SEM and DRX analysis were performed to characterize the raw and functionalized fiber. Colorimetry techinique was also employed for measuring the effective functionalization of the fiber. Also, the waste's resistance to alkaline medium was evaluated. The splitting tension test (TCD) was used to evaluate the effect of the fiber on the mechanical behavior of the cement matrix.Fiber type: raw and functionalized; concentration: 0,5 and 1% and particle size: large (retained in 14 mesh sieve) and thin (through 28 mesh sieve) were evaluated in cement matrices with 7 days of setting time. The characterization showed that the residue consists almost exclusively of cellulose, as well as being highly resistant to alkaline environment. Colorimetric analysis after dyeing and washing of the residue, and SEM images showed that the PDDACl indeed adhered to the surface of the residue by physical adsorption. The results of the TCD tests indicate that resistance increases is proportional to the concentration of cellulosic waste used. The smaller residue also showed better results. For the functionalized residue, content of 0.5% resulted in a reduction of the mechanical properties, however, the use of 1% of functionalized residue showed the best results. The functionalized cotton fiber waste originating from the sanding process shows great potential for application in cement pastes for wells cementing, in view of the significant increase in splitting tension strength, even with a low content of the waste.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-01-13T12:25:48Z No. of bitstreams: 1 MarcelAraujoRocha_DISSERT.pdf: 5011334 bytes, checksum: d4996c7516aeda7455db92bc1ebfc1d5 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-01-23T13:23:05Z (GMT) No. of bitstreams: 1 MarcelAraujoRocha_DISSERT.pdf: 5011334 bytes, checksum: d4996c7516aeda7455db92bc1ebfc1d5 (MD5) / Made available in DSpace on 2017-01-23T13:23:05Z (GMT). No. of bitstreams: 1 MarcelAraujoRocha_DISSERT.pdf: 5011334 bytes, checksum: d4996c7516aeda7455db92bc1ebfc1d5 (MD5) Previous issue date: 2016-03-14 / A explora??o de reservas de hidrocarbonetos pesados e extrapesados ? de interesse primordial para muitas companhias de petr?leo, uma vez que, a magnitude desses recursos representa parte da energia mundial. A produ??o de ?leo pesado, a partir de dep?sitos subterr?neos, ? complexa, at? mesmo sob as melhores circunst?ncias, devido principalmente ? elevada viscosidade do ?leo. Para melhor desenvolver o processo de produ??o, tornando-o eficiente, de maneira que os fluidos que n?o seriam produzidos consigam chegar ? superf?cie, foram desenvolvidos m?todos de recupera??o convencionais e especiais, para obten??o de um maior fator de recupera??o e, consequentemente, uma maior lucratividade na opera??o de explota??o dessas jazidas. Para reduzir a alta viscosidade e as elevadas tens?es interfaciais, foram desenvolvidos os m?todos t?rmicos. Nesse trabalho, simulou-se a inje??o continua de vapor, com po?os injetores verticais e horizontais, para desenvolver um reservat?rio com caracter?sticas do Nordeste brasileiro, de ?leo pesado, atrav?s da condu??o dos fluidos produzidos com po?o horizontal. Foram feitas an?lises t?cnicas e econ?micas dos modelos que diferiam quanto ?s suas restri??es e arranjos estruturais do sistema. Na configura??o horizontal se observou a influ?ncia da vaz?o de inje??o, da dist?ncia vertical e da dist?ncia lateral sobre o fator de recupera??o. Na configura??o vertical se analisou a influ?ncia da vaz?o de inje??o, da completa??o dos injetores, da dist?ncia lateral e da quantidade de po?os injetores sobre o fator de recupera??o. Diante dos modelos proposto, analisou-se a produ??o acumulada de ?leo, o Volume Poroso Injetado, a forma??o das c?maras de vapor e o Valor Presente L?quido. Tecnicamente, os modelos em que se injetou vapor com po?os verticais obtiveram maior fator de recupera??o de ?leo, j? os modelos horizontais se sobressa?ram economicamente. / The reserves exploration of heavy and extra heavy hydrocarbon is of prime interest to many oil companies, since the magnitude of these resources the magnitude of these resources still stands out on the global and Brazilian energy matrix. The production of heavy oil, from the underground deposits is complex, even on the best of circumstances, mainly due to the high viscosity of the oil. To further develop the process of production, making it efficient, so that the fluids that would not be produced get to reach the surface, complementary recovery methods and advanced were developed to obtain a higher recovery factor and, hence, greater profitability in operation exploitation of these deposits. To combat the high viscosity and high interfacial tensions, thermal methods were developed. In this work, the steam injection continues was simulated in vertical and horizontal injection wells, to develop a reservoir with characteristics of the Brazilian Northeast of heavy oil, by conducting fluid produced with horizontal well. Technical and economic analyzes were made of the models that differ in their structural constraints and system arrangements. In horizontal configuration was observed the influence of the injection flow, of the vertical distance and of the lateral distance over the recovery factor. In vertical configuration was analyzed the influence of the injection flow, of the injection wells completion, of the lateral distance and the amount of injection wells over the recovery factor. Faced the proposed models, was analyzed the cumulative oil production, the Pore Volume Injected, the formation of steam chambers and the Net Present Value. Technically, the models in which steam is injected with vertical wells had higher recovery factor of oil, since the horizontal models stood out economically.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-02-10T16:44:41Z No. of bitstreams: 1 ZildianyIbiapinaMeneses_TESE.pdf: 5538896 bytes, checksum: aeb6e8b7a1071f0fe7d56cd5089c7e65 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-02-10T21:58:03Z (GMT) No. of bitstreams: 1 ZildianyIbiapinaMeneses_TESE.pdf: 5538896 bytes, checksum: aeb6e8b7a1071f0fe7d56cd5089c7e65 (MD5) / Made available in DSpace on 2017-02-10T21:58:03Z (GMT). No. of bitstreams: 1 ZildianyIbiapinaMeneses_TESE.pdf: 5538896 bytes, checksum: aeb6e8b7a1071f0fe7d56cd5089c7e65 (MD5) Previous issue date: 2016-05-23 / As nanoemuls?es s?o sistemas geralmente compostos por tensoativos, fase aquosa e fase oleosa. Podem variar de acordo com a composi??o, tamanho das got?culas dispersas, aspecto, aplica??es, dentre outros. Apresentam got?culas dispersas em escala nanom?trica, estabilidade cin?tica e aspecto transparente a transl?cido. Dentre suas vantagens, destaca-se a maior superf?cie de contato devido ao tamanho das got?culas dispersas, associado ? menor quantidade de mat?ria ativa. Este trabalho prop?e produzir novas nanoemuls?es atrav?s da dilui??o de microemuls?o com sua fase aquosa ou com fase aquosa polim?rica salina, e aplica??o na recupera??o de petr?leo em rochas carbon?ticas. A microemuls?o precursora ? composta por tensoativos ani?nico e n?o i?nico (UNT-L90 e sab?o base), cotensoativo (n-butanol), fase oleosa (querosene) e fase aquosa (solu??o de NaCl a 3,50%). Os sistemas nanoemulsionados foram estudados em rela??o ao percentual de tensoativos (1,00%, 1,25%, 2,00%, 2,50%, 5,00% e 7,00%) e ? presen?a de pol?meros (ani?nico e cati?nico, a 0,08%). Os sistemas propostos neste estudo foram caracterizados usando as seguintes t?cnicas: tamanho de got?cula, turbidez, tens?o superficial, tens?o interfacial, condutividade el?trica, pH, ?ndice de refra??o, densidade, reologia e SAXS. A microemuls?o e as nanoemuls?es, sem pol?mero, foram caracterizadas como fluidos Newtonianos, enquanto as nanoemuls?es polim?ricas como fluidos pseudopl?sticos. A microemuls?o foi termodinamicamente est?vel, transparente e com got?culas monodispersas, com 11,8 nm de di?metro. Os sistemas nanoemulsionados foram metaest?veis, com got?culas variando de 16,80 nm a 61,40 nm. Os sistemas microemulsionado e nanoemulsionados apresentaram micelas diretas do tipo ?miolo-casca? em seu interior. A microemuls?o e algumas nanoemuls?es estudadas foram utilizadas na recupera??o avan?ada de petr?leo, aplicadas a um reservat?rio carbon?tico contendo ?leo leve. Os melhores resultados foram de 99,56% e 75,18% de extra??o do ?leo remanescente, para a microemuls?o e nanoemuls?o, respectivamente; com recupera??es totais de ?leo original de 99,73% e 83,28%. O efeito sin?rgico entre o meio salino, micelas e pol?mero favoreceu a recupera??o de ?leo com as nanoemuls?es; cujo melhor resultado foi obtido com a NanoD2, composta por 2,50% de tensoativos, 3,50% de NaCl e 0,08% do pol?mero AN 934 PWG; embora as propriedades da rocha tamb?m tenham influ?ncia. O trabalho mostrou que nanoemuls?es e microemuls?es podem ser alternativas vi?veis para aplica??o em recupera??o avan?ada de petr?leo. / Nanoemulsions are systems generally composed by surfactant, aqueous phase and oil phase. These systems may vary according to their composition, size of dispersed droplets, appearance, applications, among others. They have nano-scale dispersed droplets, kinetic stability and an appearance from transparent to translucent. Among their advantages, it may be highlighted the large contact surface, due to the size of the dispersed droplets, associated with smaller amount of active matter. This research proposes the production of new nanoemulsions, through the dilution of microemulsion, with its aqueous phase or with saline polymeric aqueous phase, and their use to recover oil in carbonate rocks. The precursor microemulsion is composed of nonionic and anionic surfactants (UNT-L90 and soap base), cosurfactant (n-butanol), oil phase (kerosene) and aqueous phase (NaCl solution at 3.50%). The nanoemulsionated systems were studied based on the percentage of surfactants (1.00%, 1.25%, 2.00%, 2.50%, 5.00% and 7.00%) and on the presence of polymers (anionic and cationic, at 0.08%). The proposed systems were characterized by using the following techniques: droplet size, turbidity, surface tension, interfacial tension, electrical conductivity, pH, refractive index, density, rheology, and SAXS. The microemulsion and the nanoemulsions, without polymers, were characterized as Newtonian fluids, while the polymeric nanoemulsions were characterized as pseudoplastic fluids. The microemulsion was thermodynamically stable, transparent and had monodispersed droplets with a diameter of 11.80 nm. The nanoemulsionated systems were metastable, with droplets ranging from 16.80 nm to 61.40 nm. The microemulsionated and nanoemulsionated systems presented direct micelles, with a core-shell inner type. The microemulsion and some studied nanoemulsions were applied as an enhanced oil recovery method, through carbonate rocks containing light oil. The best results extracted 99.56% and 75.18% of the remaining oil, for the microemulsion and nanoemulsion, respectively, with total oil recovery of 99.73% and 83.28%. The synergic effect among saline medium, micelles and polymer favored the oil recovery with nanoemulsions; whose best result was obtained by NanoD2, composed of 2.50% surfactants, 3.50% NaCl and 0.08% of the AN 934 PWG polymer; although the rock properties also influences the process. The work showed that nanoemulsions and microemulsions can be viable alternatives for application in enhanced oil recovery.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-06-13T19:56:34Z No. of bitstreams: 1 LarissaCiciannyLuzFerreiraDeAraujo_TESE.pdf: 3361603 bytes, checksum: 8da0327f1fa708d7b02bec63cf53a5f0 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-06-19T11:40:01Z (GMT) No. of bitstreams: 1 LarissaCiciannyLuzFerreiraDeAraujo_TESE.pdf: 3361603 bytes, checksum: 8da0327f1fa708d7b02bec63cf53a5f0 (MD5) / Made available in DSpace on 2017-06-19T11:40:01Z (GMT). No. of bitstreams: 1 LarissaCiciannyLuzFerreiraDeAraujo_TESE.pdf: 3361603 bytes, checksum: 8da0327f1fa708d7b02bec63cf53a5f0 (MD5) Previous issue date: 2016-08-26 / Os nanomateriais (catalisadores) mesoporosos e microporosos s?o considerados promissores para obten??o de derivados leves a partir de fra??es pesadas do petr?leo e como adsorventes para prote??o ambiental. Este trabalho reportou a sintetize pelo m?todo hidrot?rmico, e caracteriza??o de catalisadores heterog?neos mesoporosos, do tipo SBA-15, com adi??o dos metais c?rio e alum?nio, avaliando sua atividade e seletividade na degrada??o t?rmica de ?leo pesado. As amostras dos materiais nanoestruturados foram caracterizadas por an?lise termogravim?trica (TG/DTG), difra??o de raios X (DRX), microscopia eletr?nica de varredura (MEV), espectroscopia de fluoresc?ncia de raios X (FRX), espectroscopia de absor??o na regi?o do infravermelho com transformada de Fourier (FTIR) e adsor??o de nitrog?nio (BET). A caracteriza??o mostrou que os materiais sintetizados resultaram em um catalisador nanoestruturado, ordenado e com di?metro de poros e ?rea superficial de acordo com a literatura existente. Com o intuito de verificar a atividade catal?tica dos mesmos, utilizou-se uma amostra de petr?leo pesado (?API=14), fornecido pela Petrobras, realizando-se atrav?s da termogravimetria o processo de degrada??o t?rmica e catal?tica do ?leo. Mediante as curvas termogravim?tricas obtidas, observou-se uma redu??o na temperatura de in?cio do processo de decomposi??o catal?tica do petr?leo. Atrav?s do modelo cin?tico n?o isot?rmico de Ozawa Flynn Wall (OFW) obtiveram-se alguns par?metros para determina??o da energia de ativa??o aparente das decomposi??es. Os resultados obtidos das difra??es de raio X mostraram atrav?s de picos caracter?sticos que a estrutura hexagonal foi formada, verificando que a melhor raz?o foi Si/Ce = 5 devido a sua intensidade em alto ?ngulo. Os espectros de infravermelho apresentaram absor??es caracter?sticas de materiais da fam?lia SBA-15. Da adsor??o de nitrog?nio, obtendo-se par?metros compat?veis aos encontrados na literatura, que lhes conferem serem promissores na ?rea da degrada??o de petr?leo, devido aos seus mesoporos facilitarem o acesso de grandes mol?culas. O di?metro m?dio dos poros variou significativamente com a incorpora??o do alum?nio e do c?rio. A espessuras de parede (Wt) ficou na faixa de 2,96 a 4,07 nm, observando assim um aumento deste par?metro que deve-se a incorpora??o dos metais na parede, indicando que a incorpora??o do c?rio, n?o bloqueou os mesoporos. O acr?scimo de alum?nio reduziu a area superficial (SBET) de 893 para 763 m2g-1, no entanto com o acr?scimo do c?rio com o alum?nio esta ?rea aumentou para 826 m2g-1. Para o petr?leo a temperatura inicial e final de perda de massa; apresentando apenas dois eventos devido ao teor de enxofre mercapt?dico, o qual influencia no surgimento do terceiro evento, j? que esse teor ? medido pela quantidade de enxofre nos an?is arom?ticos (HC pesados). A mistura do Petr?leo + 12% de Ce5Al50SBA-15 evidenciando a atividade catal?tica deste material. / Nanomaterials (catalysts) are microporous and mesoporous considered promising for obtaining light oil products from heavy oil fractions and adsorbents for environmental protection. This paper reported the synthesizes by hydrothermal method, and characterization of mesoporous heterogeneous catalysts, the SBA-15 type with addition of metals cerium and aluminum, evaluating their activity and selectivity in the thermal degradation of heavy oil. Samples of nanostructured materials were characterized by thermal gravimetric analysis (TG / DTG), X-ray diffraction (XRD), scanning electron microscopy (SEM), ray fluorescence spectroscopy X (XRF) spectroscopy, absorption in the infrared region Fourier transform (FTIR) and nitrogen adsorption (BET). The characterization showed that the synthesized materials resulted in a nanostructured catalyst and ordered pore diameter and surface area according to the literature. In order to check the catalytic activity of the same, we used a heavy oil sample (?API = 14), supplied by Petrobras, is performing through thermogravimetry the process of thermal and catalytic degradation of the oil. Through the thermogravimetric curves, it was observed a reduction in the opening of oil decomposition catalytic process temperature. Through non isothermal kinetic model Ozawa Flynn Wall (OFW) gave some parameters to determine the apparent activation energy of decomposition. Obtaining as results of X-ray diffraction showed through characteristic peaks that the hexagonal structure was formed, noting that the best reason was Si / Ce = 5 because of its intensity at a high angle. The infrared spectra showed absorptions family material characteristics SBA-15. The nitrogen adsorption, obtaining parameters compatible with those found in the literature which confer them to be promising in the field of oil degradation due to their mesopores facilitate access of large molecules. The average pore diameter varied significantly with the incorporation of aluminum and cerium. The wall thickness (Wt) was in the range from 2.96 to 4.07 nm, thus observing an increase in this parameter which is due to incorporation of the metals into the wall, indicating that the incorporation of cerium, did not block the mesopores. The addition of aluminum reduced the surface area (SBET) of 893 to 763 m2 g-1, however with the addition of cerium with aluminum this area increased to 826 m2 g-1. For the oil temperature and the initial end of weight loss; presenting only two events due to mercapt?dico sulfur, which influences the appearance of the third event, since that content is measured by the amount of sulfur in aromatic rings (heavy HC). The mixture of oil + 12% of Ce5Al50SBA-15 showing the catalytic activity of this material.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-09-04T21:21:48Z No. of bitstreams: 1 ArlindoFigueiroaEscobarTeixeiraDeOliveira_DISSERT.pdf: 1960267 bytes, checksum: 009162412c53715e9bf4d7e0c5c740af (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-09-11T19:50:56Z (GMT) No. of bitstreams: 1 ArlindoFigueiroaEscobarTeixeiraDeOliveira_DISSERT.pdf: 1960267 bytes, checksum: 009162412c53715e9bf4d7e0c5c740af (MD5) / Made available in DSpace on 2017-09-11T19:50:56Z (GMT). No. of bitstreams: 1 ArlindoFigueiroaEscobarTeixeiraDeOliveira_DISSERT.pdf: 1960267 bytes, checksum: 009162412c53715e9bf4d7e0c5c740af (MD5) Previous issue date: 2017-03-31 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / As Redes Cooperativas de Pesquisa, Inova??o e Transfer?ncia de Tecnologia do Setor Petr?leo e G?s Natural nas Regi?es Norte e Nordeste (Redes N/NE) foram criadas ap?s a promulga??o da Lei do Petr?leo, atrav?s do Edital CT-Petro CNPq/Finep 03/2011, com o objetivo de produzir Ci?ncia, Tecnologia e Inova??o (CT&I), al?m formar recursos humanos capacitados na ?rea de Petr?leo e G?s Natural (P&G) atendendo as demandas do setor nas unidades federativas do Norte e Nordeste, direcionando recursos para infraestrutura, bolsas de pesquisa, como tamb?m articulando pesquisadores de diferentes institui??es e empresas inseridos em ambas as regi?es. Das 13 Redes N/NE formadas, tr?s foram lideradas pela Universidade Federal do Rio Grande do Norte (UFRN). Tendo em vista que as tr?s Redes N/NE coordenadas pela UFRN causaram rebatimentos na CT&I das unidades federativas das regi?es Norte e Nordeste, a presente investiga??o tem como quest?o central: quais os rebatimentos das Redes N/NE de P&G coordenadas pela UFRN na CT&I no Rio Grande do Norte? Partindo da hip?tese que essas tr?s Redes N/NE consolidaram compet?ncias de CT&I na ?rea de P&G no estado potiguar. Optamos por analisar os impactos da respectiva pol?tica p?blica de CT&I no Rio Grande do Norte, justamente por se tratar do principal estado produtor de petr?leo do Norte e Nordeste, pelo fato de que ? l? que os ?n?s? das tr?s Redes N/NE est?o situados e, consequentemente, por ser o local em que os impactos foram mais intensos. Visando solucionar a quest?o central proposta, adotamos alguns procedimentos metodol?gicos, nos quais destacamos: o levantamento bibliogr?fico atrav?s de trabalhos acad?micos que abordassem as redes de pesquisa, pol?ticas p?blicas de CT&I, setor de P&G do Rio Grande do Norte e Redes N/NE; as pesquisas de campo na UFRN, campus Natal, em que visitamos as instala??es expandidas e constru?das atrav?s dos recursos provenientes das Redes N/NE e de outras pol?ticas de CT&I na ?rea de P&G, al?m de realizarmos entrevistas com roteiros pr?-estruturados com os l?deres das tr?s Redes N/NE e com outros importantes atores; a utiliza??o do software ArcGIS 10.3, visando demonstrar as configura??es espaciais iniciais das Redes N/NE e as suas sucessivas reconfigura??es; coleta de dados secund?rios atrav?s da Plataforma Lattes e do Instituto Nacional de Propriedade Industrial (INPI), a cerca da produ??o cient?fica, tecnol?gica e inovativa dos participantes das tr?s Redes N/NE inseridos na UFRN, com o intuito de mensurarmos e analisarmos os rebatimentos da pol?tica no Rio Grande do Norte. Em linhas gerais, os resultados demonstraram que as tr?s Redes N/NE produziram CT&I e formaram recursos humanos no estado potiguar ao longo dos dez anos de vig?ncia da pol?tica e que mesmo ap?s o seu fim, os pesquisadores ainda continuam desenvolvendo tais atividades, utilizando os laborat?rios adquiridos e os conhecimentos obtidos. Por fim, destacamos que as tr?s Redes N/NE lideradas pela UFRN consolidaram compet?ncias de CT&I na ?rea de P&G no Rio Grande do Norte, tendo em vista que antes da Lei do Petr?leo, nenhum dos pesquisadores da UFRN que veio a participar das Redes N/NE estudava o setor de P&G, e entre a sua promulga??o e o lan?amento do Edital, a maior parte deles ainda estava iniciando seus trabalhos na ?rea, mas sem laborat?rios adequados, articula??es com pesquisadores de outras institui??es e intera??es com o setor produtivo. / The Cooperative Networks for Research, Innovation and Technology Transfer of the Oil and Natural Gas Sector in the North and Northeast Regions (N/NE Networks) were created after the promulgation of the Petroleum Law, through the CT-Petro CNPq/ Finep 03/2011 , in order to produce Science, Technology and Innovation (ST&I), and to train qualified human resources in the area of Oil and Gas (O&G), meeting the sector's demands in the North and Northeast federative units, directing resources for infrastructure, research grants, also articulating researchers from different institutions and companies in both regions. Of the 13 N/NE Networks formed, three were led by the Federal University of Rio Grande do Norte (UFRN). Considering that the three N/NE Networks coordinated by UFRN caused refutations in the ST&I of the federative units of the North and Northeast regions, the present research has as central question: which are the refutations of the three N/NE Networks coordinated by UFRN in STI in the Rio Grande do Norte? Based on the hypothesis that these three N/NE Networks consolidated ST&I competences in the O&G area in the state of Rio Grande do Norte. We chose to analyze the impacts of the respective public policy of STI in Rio Grande do Norte, precisely because it is the main oil producing state in the North and Northeast, because it is there that the nodes of the three N/NE Networks are located and, consequently, as the place where the impacts were most intense. In order to solve the proposed central issue, we adopted some methodological procedures, in which we highlight: the bibliographical survey through academic works that approached the research networks, public policies of ST&I, O&G sector of Rio Grande do Norte and Networks N/NE; The field surveys at UFRN, campus Natal, where we visited the facilities expanded and built through resources from the N/NE Networks and other ST &I policies in the O&G area, in addition to conducting interviews with pre-structured scripts with the leaders of the three N/NE Networks and with other important actors; We use of ArcGIS 10.3 software to demonstrate the initial spatial configurations of the N/NE Networks and their successive reconfigurations; Secondary data collection through the Lattes Platform and the National Institute of Industrial Property (INPI), about the scientific, technological and innovative production of the participants of the three N/NE Networks inserted in the UFRN, with the purpose of measuring and analyzing the policy in Rio Grande do Norte. In general terms, the results showed that the three N/NE Networks produced ST&I and formed human resources in the state during the ten years of the policy, and that even after its end, researchers continue to develop such activities using the laboratories acquired and the knowledge obtained. Finally, we highlight that the three N NE Networks led by UFRN consolidated ST&I competencies in the O&G area in Rio Grande do Norte, considering that before to the Petroleum Law, none of the UFRN researchers who participated in the N/NE studied the O&G sector, and between its promulgation and the announcement, most of them were still starting their work in the area, but without adequate laboratories, articulations with researchers from other institutions and interactions with the productive sector.

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2017-07-25T20:36:23Z No. of bitstreams: 1 2015 - ?rika Silva de Andrade Costa.pdf: 1074135 bytes, checksum: 2b5e5cb7661b0835b3bb5271198997a6 (MD5) / Made available in DSpace on 2017-07-25T20:36:23Z (GMT). No. of bitstreams: 1 2015 - ?rika Silva de Andrade Costa.pdf: 1074135 bytes, checksum: 2b5e5cb7661b0835b3bb5271198997a6 (MD5) Previous issue date: 2015-11-18 / This dissertation had the purpose of discussing the evaluation methodology of oil & gas Environmental Education Projects (EEP) as an environmental licensing requirement. Furthermore, it aimed to shine a new perspective on EEP?s evaluation process, seeking alternatives from Social Development Projects (focused on empowerment) and presenting a compilation of suggestions from existing literature. The research showed that the EEP?s evaluation methodology has evolved significantly since 2010, but there?s still some discussion and experimentation regarding it. As such, further research is required to establish quantitative and qualitative indicators that can measure community critical and political participation. With regard to Social Development Projects, in spite the monitoring and evaluation process? limitations and the fact that the field is constantly evolving, greater field experience may bring contributions to the proceeding currently utilized on EEP. Thereby, a few directives may be incorporated by the evaluation practices on this field, such as the logical model, the problem tree and the spider diagram. Concerning the suggestions from existing literature to evaluate EEP, this study highlights the methodology created by Pocho (2011) to evaluate social programs from public policies, which is itself a consistent basis for discussion of an institutional evaluation system. Lastly, it?s important to highlight that the key factor to the success of the evaluation process is the selection and use of indicators. In this sense, the use of experimental indicators, open questions and tools such as ?life stories? or ?timelines and chronologies? is of great importance. The study concludes that, if evaluation methods are to evolve, it?s essential to experiment, seek and discuss methods and indicators currently used as well as possible contributions that other knowledge from other fields may provide. To do so, CGPEG has a fundamental stimulatory and leadership role on this process. / A disserta??o teve como objetivo discutir a metodologia de avalia??o dos Projetos de Educa??o Ambiental (PEA), no ?mbito do licenciamento da ind?stria offshore de petr?leo e g?s. Al?m disso, visou trazer uma nova perspectiva ao processo avaliativo destes, levantando alternativas oriundas dos Projetos de Desenvolvimento Social (com foco no empoderamento) e apresentando uma compila??o de sugest?es j? descritas na literatura. A partir da pesquisa observou-se que a metodologia de avalia??o dos PEA evoluiu significativamente a partir de 2010, mas ainda est? em fase de discuss?o, experimenta??o e amadurecimento. Com isso, destaca-se a necessidade de intensificar as pesquisas sobre indicadores quantitativos e qualitativos que possam mensurar a participa??o cr?tica e pol?tica da comunidade. No que diz respeito aos Projetos de Desenvolvimento Social, apesar de o pr?prio processo de monitoramento e avalia??o possuir limita??es e estar em constante processo de aperfei?oamento, a maior experi?ncia no campo pode trazer contribui??es para os procedimentos utilizados atualmente nos PEA. Com isso, destacam-se diretrizes que podem ser incorporadas ?s pr?ticas de avalia??o nesse campo, como o modelo l?gico, ?rvore de problemas e diagrama da aranha. No que diz respeito a sugest?es j? descritas na literatura para avalia??o dos PEA, destaca-se a metodologia para a avalia??o de programas sociais no ?mbito das pol?ticas p?blicas, elaborada por Pocho (2011), que j? ? uma base consistente para discuss?o e amadurecimento de um sistema avaliativo institucional. Por fim, destaca-se que o ponto-chave para o sucesso do processo avaliativo ? a escolha e uso de indicadores. Nesse sentido, destaca-se o uso de indicadores mais experimentais, perguntas abertas, assim como o uso de ferramentas como ?hist?rias de vida? ou ?linhas do tempo e cronologias?. Acredita-se que para a evolu??o dos m?todos avaliativos ? essencial manter o levantamento, experimenta??o e discuss?o conjunta dos m?todos e indicadores atualmente utilizados e das poss?veis contribui??es que outras ?reas de conhecimento podem fornecer. Nesse sentido, destaca-se o papel fundamental da CGPEG como estimulador e l?der na evolu??o desse processo.

Made available in DSpace on 2015-12-03T18:33:12Z (GMT). No. of bitstreams: 1 Douglas_Schiavoni_Froemming.pdf: 909162 bytes, checksum: f58083bdabbc536634558bada9dca381 (MD5) Previous issue date: 2015-02-10 / The federal decentralization promoted by the Constitution of 1988 raised the Brazilian municipalities to the important role in the dissemination of public policies. Once they are closest to the population, the decisions made at the municipal level are readily perceived by users and citizens. On the other hand, the social demands and the management of the administrative structure need efficient financial management and a constant search for resources. Additionally, the 9.478/97 Act, which amended the mode of distribution of oil revenues, brought to some municipalities, a new frontier of resources available by the distribution of oil royalties. Given this new frontier of resources, one wonders whether there is not relaxation in fiscal effort and an increasing inefficiency in the management of the administrative machinery by the benefited municipalities. The aim of this work is verify if petroleum revenues cause distortions in the way municipalities run their fiscal effort, that is, if the oil royalties contribute to increase inefficiencies in the municipalities involved in their search for the own revenues and their expense management. For this work, we selected 56 municipalities of the State of S??o Paulo which have been received the distribution of oil revenues during the period between the years 2005 to 2012. The efficiency of municipalities was obtained from a non-parametric production frontier model, the Data Envelopment Analysis - DEA, creating a ranking of the S??o Paulo municipalities which received oil royalties. Given the distribution rules of oil royalties imposed by the regulatory framework, the results showed the values distributed to S??o Paulo municipalities have great variability and has been showed relevant only in a few municipalities. There was no significant difference in the tax effort of the municipalities affected by the variable oil royalites. However, several factors related to municipal management indicated that such rents can contribute to increase inefficiencies in the management of municipal administrative machinery / A descentraliza????o federativa, promovida pela Constitui????o Federal de 1988, elevou os Munic??pios brasileiros ao importante papel na dissemina????o das pol??ticas p??blicas. Por estarem mais pr??ximos da popula????o, as decis??es realizadas na esfera municipal s??o prontamente percebidas pelos usu??rios e pelos cidad??os. Por outro lado, as demandas sociais e a administra????o da m??quina administrativa necessitam de uma gest??o financeira eficiente e uma constante busca por recursos. Adicionalmente, a Lei 9.478/97, que alterou o modo de distribui????o das rendas do petr??leo, trouxe, para alguns Munic??pios, uma nova fronteira de recursos, disponibilizada pela distribui????o dos royalties de petr??leo. Diante dessa nova fronteira de recursos, questiona-se se n??o h??, por parte dos Munic??pios beneficiados, um relaxamento no esfor??o fiscal e o aumento da inefici??ncia na gest??o da m??quina administrativa. Neste trabalho objetiva-se verificar se as rendas do petr??leo provocam distor????es na forma como os Munic??pios s??o conduzidos em seu esfor??o fiscal, ou seja, se os royalties de petr??leo contribuem para o aumento das inefici??ncias nos Munic??pios envolvidos em sua busca pelas receitas pr??prias e na sua gest??o de despesas. Para a realiza????o deste trabalho, foram selecionados 56 Munic??pios do Estado de S??o Paulo, contemplados pela distribui????o das rendas do petr??leo durante o per??odo compreendido entre os anos de 2005 a 2012. A efici??ncia dos Munic??pios foi obtida a partir de um modelo de fronteira de produ????o n??o param??trico, a An??lise Envolt??ria de Dados, criando um ranking dos Munic??pios paulistas beneficiados pelos royalties de petr??leo. Os resultados mostraram que, diante das regras de distribui????o dos royalties de petr??leo impostas pelo marco regulat??rio, os valores distribu??dos aos Munic??pios paulistas possuem grande variabilidade e s??o relevantes apenas em poucos Munic??pios. N??o houve diferen??a significativa no esfor??o fiscal dos Munic??pios afetados pela vari??vel royalites de petr??leo. No entanto, diversos fatores ligados ?? gest??o municipal indicaram que tais rendas contribuem para aumentar as inefici??ncias na gest??o da m??quina administrativa municipal

Made available in DSpace on 2014-12-17T15:42:14Z (GMT). No. of bitstreams: 1 GuymmannCS_DISSERT-.pdf: 2904070 bytes, checksum: 4cd1c00978977c422c79766db70f2678 (MD5) Previous issue date: 2011-08-12 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Alkyl polyethoxylates are surfactants widely used in vastly different fields, from oil exploitation to pharmaceutical applications. One of the most interesting characteristics of these surfactants is their ability to form micellar systems with specific geometry, the so-called wormlike micelle. In this work, microemulsions with three distinct compositions (C/T = 40 %, 30 % and 25 %) was used with contain UNITOL / butanol / water / xylene, cosurfactant / surfactante (C/S) ratio equal to 0,5. The microemulsion was characterized by dynamic light scattering (DLS), capillary viscometry, torque rheometry and surface tensiometry experiments carried out with systems based on xylene, water, butanol (cosurfactant) and nonaethyleneglycolmonododecyl ether (surfactant), with fixed surfactant:cosurfactant:oil composition (with and without oil phase) and varying the overall concentration of the microemulsion. The results showed that a transition from wormlike micelles to nanodrops was characterized by maximum relative viscosity (depending on how relative viscosity was defined), which was connected to maximum effective diameter, determined by DLS. Surface tension suggested that adsorption at the air water interface had a Langmuir character and that the limiting value of the surfactant surface excess was independent of the presence of cosurfactant and xylene. The results of the solubilization of oil sludge and oil recovery with the microemulsion: C/S = 40%, 30% and 25% proved to be quite effective in solubilization of oil sludge, with the percentage of solubilization (%solubilization) as high as 92.37% and enhanced oil recovery rates up to 90.22% for the point with the highest concentration of active material (surfactant), that is, 40%. / Os tensoativos alquil-polietoxilados s?o amplamente utilizados em diferentes campos, desde a explota??o de petr?leo at? aplica??es na ind?stria farmac?utica. Uma das caracter?sticas mais interessantes destes tensoativos ? a sua capacidade de formar sistemas micelares que apresentam uma geometria micelar espec?fica, a chamada micela wormlike, tipo verme . Neste trabalho, foram utilizados tr?s pontos de microemuls?o: C/T = 40 %, C/T = 30 % e C/T = 25 % num sistema contendo UNITOL/xileno/butanol/?gua. Esses pontos de microemuls?o foram caracterizados por espalhamento de luz din?mico (DLS), viscosimetria capilar, reometria de torque e tens?o superficial com composi??es de tensoativo, cotensoativo e ?leo fixo - 5 % (com e sem fase ?leo) e variando a concentra??o total dos pontos de microemuls?o. Os resultados mostraram que a transi??o da geometria de micela wormlike para nanogotas poderia ser caracterizada por um m?ximo na viscosidade relativa (dependendo de como a viscosidade foi definida), que foi vinculado a um m?ximo de di?metro efetivo, determinada por DLS. A tens?o superficial sugeriu que a adsor??o na interface ?gua/ar tinha um car?ter de Langmuir, o limite de excesso da superf?cie do tensoativo ? independente da presen?a de cotensoativo e do xileno, e que o valor limite do excesso superficial foi independente da presen?a de cotensoativo e xileno. Os resultados da solubiliza??o da borra de petr?leo e da recupera??o avan?ada de petr?leo com os pontos de microemuls?o C/T = 40 %, C/T = 30 % e C/T = 25 %, se mostraram bastante eficaz com solubiliza??o da borra de petr?leo, com porcentagem de solubiliza??o (% solubiliza??o) at? 92,37 %, e recupera??o avan?ada de petr?leo de at? 90,22 % para o ponto que apresenta maior concentra??o de mat?ria ativa (tensoativo), ou seja, C/T = 40 %.

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2017-04-20T13:29:23Z No. of bitstreams: 1 2016 - Rafael Veloso Patr?cio.pdf: 9711857 bytes, checksum: 5f7e5b198769c9a633040fd42126df03 (MD5) / Made available in DSpace on 2017-04-20T13:29:23Z (GMT). No. of bitstreams: 1 2016 - Rafael Veloso Patr?cio.pdf: 9711857 bytes, checksum: 5f7e5b198769c9a633040fd42126df03 (MD5) Previous issue date: 2016-08-24 / Funda??o de Apoio a Pesquisa Cient?fica e Tecnol?gica da UFRRJ-FAPUR / Controling of downhole pressure is essential for a safety process of oil well drilling. In a permeable formation, fluids from reservoir come into the annulus region (wellbore) when the downhole pressure is below pore pressure, featuring a disorder called kick. Literature reports some mathematical models developed to predict the behavior of the wellbore in presence of gas kick, however, there are few works reporting control and experiments. By this reason, it was built an experimental plant in order to study system?s behavior during fluid inlet (gas) from reservoir to annulus, and then, sought to develop a control strategy able to mitigate this disorder, without shut-in the well. A strategy with reconfiguration of the control law feedback?feedforward was designed to reject disturbance (gas inlet in the annular), to ensure the drilling within the operating window. Parallelly,simulation studies were developed which are: the construction of mathematical model, validated by the employment of the experimental unit, and the implementation of control based on reconfiguration of control law. / O controle da press?o anular de fundo ? fundamental para que a perfura??o de po?os de petr?leo seja feita de forma segura. Em uma forma??o perme?vel, fluidos do reservat?rio migram para a regi?o anular quando a press?o anular de fundo est? abaixo da press?o de poros, caracterizando o dist?rbio denominado kick. A literatura reporta alguns modelos matem?ticos desenvolvidos para prever o comportamento do po?o na presen?a de kick de g?s, por?m poucos s?o os trabalhos abordando controle e experimentos. A partir desta motiva??o, foi constru?do uma planta experimental para estudar o comportamento do sistema durante a entrada de fluido (g?s) do reservat?rio no anular, e assim, buscou-se desenvolver uma estrat?gia de controle que mitigue tal dist?rbio sem a necessidade do fechamento total do po?o. Uma estrat?gia com reconfigura??o da lei de controle feedback?feedforward foi desenvolvida para rejeitar a perturba??o (entrada de g?s no anular), visando assegurar a perfura??o dentro da janela operacional. Paralelamente, foram desenvolvidos estudos de simula??o quais sejam: a constru??o de um modelo matem?tico, validado empregando-se a unidade experimental, e a implanta??o de controle baseado em reconfigura??o da lei de controle