Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-08-16T22:25:59Z No. of bitstreams: 1 RhaulPhillypiDaSilva_DISSERT.pdf: 3293809 bytes, checksum: bb1598adff094d59d1e342b8a9cae1eb (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-08-23T22:01:35Z (GMT) No. of bitstreams: 1 RhaulPhillypiDaSilva_DISSERT.pdf: 3293809 bytes, checksum: bb1598adff094d59d1e342b8a9cae1eb (MD5) / Made available in DSpace on 2016-08-23T22:01:35Z (GMT). No. of bitstreams: 1 RhaulPhillypiDaSilva_DISSERT.pdf: 3293809 bytes, checksum: bb1598adff094d59d1e342b8a9cae1eb (MD5) Previous issue date: 2016-03-21 / Devido aos grandes desafios encontrados na perfura??o de po?os, h? uma necessidade de se desenvolver fluidos com propriedades adequadas e capazes de atender todas as exig?ncias da perfura??o. As propriedades f?sico-qu?micas e reol?gicas devem ser cuidadosamente controladas para que um fluido possa exercer todas suas fun??es. Nas perfura??es onde as forma??es sens?veis a ?gua e ?offshore?, torna-se necess?ria a utiliza??o de fluidos de perfura??o base ?leo, por?m as argilas benton?ticas n?o podem ser usadas sem uma pr?via mudan?a superficial para que suas superf?cies se tornem hidrof?bicas. Ultimamente, as empresas de petr?leo no Brasil utilizam argilas organof?licas importadas na prepara??o de fluidos de perfura??o a base de ?leo. O trabalho teve por objetivo modificar uma argila c?lcica visando aumentar a afinidade da mesma pela fase org?nica de fluidos de perfura??o a base de ?leo, aplicando tr?s tensoativos (OCS, CTAB e UTM 150) em diferentes concentra??es. O resultados indicaram que os tensoativos UTM 150 e CTAB apresentaram resultados superiores quando comparados com OCS. Considerando o tipo de tensoativo e concentra??o como vari?veis utilizadas na an?lise estat?stica, os resultados indicaram que somente a tens?o superficial e concentra??o de ?xido de c?lcio como resposta no processo de organofiliza??o apresentaram os efeitos estatisticamente significativos. A argila organofilizada apresenta potencial para aplica??o em fluido de perfura??o ? base de ?leo. / Due to the great challenges encountered in drilling wells, there is a need to develop fluids with appropriated properties and able to meet all the requirements of drilling operations. The physicochemical and rheological properties must be carefully controlled so that a fluid can exercise all its functions. In perforations sensitive to contact with water and "offshore", it becomes necessary the use of oil based drilling fluids, but the bentonite clay cannot be used without a previous surface modification so that their surfaces become hydrophobic. Lately, the oil companies in Brazil use imported organoclays in the preparation of oil-based drilling fluids. The study aimed to modify a calcium clay to increase the affinity of the same organic phase of oil-based drilling fluids, applying three surfactants (OCS, CTAB and UTM 150) at different concentrations. The results indicated that the surfactants UTM 150 and CTAB showed better results compared to OCS. Considering the type of surfactant and concentration as variables used in the statistical analysis, the results indicated that only the surface tension and concentration of calcium oxide in response to organophilization process showed statistically significant effects. The organophilizated clay has potential for application in oil-based drilling fluids.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-01-26T17:52:57Z No. of bitstreams: 1 RenatoPereiraPintoDantas_DISSERT.pdf: 1885998 bytes, checksum: a969cb64bed868735a33f1dacbb2d9f1 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-01-28T19:48:31Z (GMT) No. of bitstreams: 1 RenatoPereiraPintoDantas_DISSERT.pdf: 1885998 bytes, checksum: a969cb64bed868735a33f1dacbb2d9f1 (MD5) / Made available in DSpace on 2016-01-28T19:48:31Z (GMT). No. of bitstreams: 1 RenatoPereiraPintoDantas_DISSERT.pdf: 1885998 bytes, checksum: a969cb64bed868735a33f1dacbb2d9f1 (MD5) Previous issue date: 2014-12-19 / Durante a perfura??o de po?os de petr?leo e g?s natural, s?o gerados res?duos s?lidos, l?quidos e gasosos. Os fragmentos s?lidos, que s?o denominados cascalhos, s?o carreados para a superf?cie atrav?s do fluido de perfura??o. Al?m disso, esse fluido tem a fun??o de resfriar a broca, manter a press?o interna do po?o, dentre outras. Esse res?duo s?lido ? bastante poluente, pois tem incorporado al?m do fluido de perfura??o, que possui v?rios aditivos qu?micos nocivos ao meio ambiente, alguns metais pesados tamb?m danosos, tais como chumbo. Com o intuito de tornar as atividades menos nocivas ao meio ambiente, as ind?strias v?m desenvolvendo processos cada vez mais sustent?veis. Atualmente, est?o sendo estudadas in?meras t?cnicas para mitigar problemas gerados com res?duos de perfura??o, tais como adi??o do cascalho na composi??o de tijolos solo-cimento para constru??o em alvenaria, nas matrizes argilosas para a fabrica??o de tijolos maci?os de alvenaria e blocos cer?micos e coprocessamento desse res?duo na fabrica??o do cimento. Desta forma, o presente trabalho tem como objetivo incorporar o cascalho oriundo da perfura??o em pastas de cimento utilizadas durante as opera??es de cimenta??o de po?os de petr?leo. O cascalho utilizado nesse trabalho, oriundo da forma??o Pend?ncias, foi mo?do e separado numa peneira de 100 mesh. Ap?s a moagem, o mesmo foi caracterizado por granulometria a laser, DRX, FRX. A mat?ria-prima apresentou di?metro m?dio de part?culas na ordem de 86 mm e estrutura cristalina contendo fases do tipo quartzo e calcita, caracter?sticos do cimento Portland. Foram formuladas e preparadas pastas de cimento, com densidade 13 lb/gal, contendo diferentes concentra??es de cascalho, e realizados ensaios de caracteriza??o API SPEC 10 A e RP 10 B. Os testes de ?gua livre apresentaram valores inferiores a 5,9% e o modelo reol?gico que melhor descreveu o comportamento das misturas foi o de pot?ncia. Os resultados de resist?ncia ? compress?o (10,3 Mpa) e estabilidade ( Dr < 0,5 lb/gal), apresentaram valores dentro dos limites estabelecidos para procedimentos operacionais. Assim sendo, o cascalho oriundo da perfura??o pode ser utilizado em pastas de cimento Portland para po?os petrol?feros, como forma de reaproveitamento deste res?duo e redu??o do custo da pasta de cimento / During the drilling of oil and natural gas are generated solid waste, liquid and gaseous. These solid fragments, which are known as cuttings, are carried to the surface through the drilling fluid. Furthermore, this fluid serves to cool the bit, keeping the internal pressure of the well, and others. This solid residue is very polluting, because it has incorporated beyond the drilling fluid, which has several chemical additives harmful to the environment, some heavy metals that are harmful to the environment, such as lead. To minimize the residue generated, are currently being studied numerous techniques to mitigate the problems that such waste can cause to the environment, like addition of cuttings in the composition of soil cement brick masonry construction, addition of cuttings on the clay matrix for the manufacture of solid masonry bricks and ceramic blocks and coprocessing of the cuttings in cement. So, the main objective of this work is the incorporation of cuttings drilling of oil wells, the cement slurry used in the cementing operation of the well. This cuttings used in this study, arising from the formation Pend?ncias, was milled and separated in a sieve of 100 mesh. After grinding had a mean particle sike in order of 86 mm and crystal structure containing phases of quartz and calcite type, characteristic of the Portland cement. Were formulated and prepared slurries of cement with density 13 lb / gal, containing different concentrations of gravel, and realized characterization tests API SPEC 10A and RP 10B. Free water tests showed values lower than 5.9% and the rheological model that best described the behavior of the mixtures was the power. The results of compressive strength (10.3 MPa) and stability (Dr <0.5 lb / gal) had values within the set of operational procedures. Thus, the gravel from the drilling operation, may be used as binders in addition to Portland cement oil wells, in order to reuse this waste and reduce the cost of the cement paste.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-03-14T21:09:10Z No. of bitstreams: 1 RafaelAraujoDaSilva_DISSERT.pdf: 1302282 bytes, checksum: cb4d89880b246386e0981baae0eea668 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-03-15T21:55:04Z (GMT) No. of bitstreams: 1 RafaelAraujoDaSilva_DISSERT.pdf: 1302282 bytes, checksum: cb4d89880b246386e0981baae0eea668 (MD5) / Made available in DSpace on 2017-03-15T21:55:04Z (GMT). No. of bitstreams: 1 RafaelAraujoDaSilva_DISSERT.pdf: 1302282 bytes, checksum: cb4d89880b246386e0981baae0eea668 (MD5) Previous issue date: 2015-01-29 / Os fluidos de perfura??o aquosos s?o os sistemas mais utilizados no mundo para a perfura??o de po?os petrol?feros, tendo sido, nas ?ltimas d?cadas, desenvolvidas excelentes formula??es para perfura??o de se??es iniciais com baixa temperatura e baixa press?o. No entanto, as reservas de petr?leo nessas condi??es est?o cada vez mais escassas, surgindo a necessidade operacional de atua??o em condi??es mais severas, ou seja, vem sendo relatada na literatura a necessidade de sistemas aquosos para atua??o em altas temperaturas e altas press?es (ATAP). As altas temperaturas dos po?os de petr?leo favorecem a degrada??o qu?mica dos pol?meros (aditivo comumente presente nas formula??es relatadas, atualmente, na literatura e aplicados em situa??es operacionais), podendo promover a redu??o da massa molar e perdas de viscosidade do sistema. Os microg?is podem ser aplicados em v?rios seguimentos da ind?stria, com destaque na ?rea do petr?leo, situa??o que s?o aplicados na estimula??o de po?os e na recupera??o avan?ada de petr?leo (EOR). Neste trabalho, a aplicabilidade de microg?is de hidroxipropilguar (HPG), obtidos por reticula??o do HPG com ?ons borato, foi avaliada quanto ? resist?ncia t?rmica em fluidos de perfura??o aquosos. A aplica??o de microg?is de HPG no fluido de perfura??o base ?gua aumentou a viscosidade aparente e reduziu o volume de filtrado na temperatura ? 25?C. Entretanto, com o aumento da temperatura para 50 ?C ocorreu redu??o da viscosidade aparente de 85 mPa.s para 25,45 mPa.s. Esses resultados indicam que o emprego de microg?is em fluidos de perfura??o aquosos pode ser uma alternativa promissora, desde que o agente reticulante seja adequadamente selecionado, ou seja, n?o sofra desativa??o com o aumento da temperatura e n?o seja influenciado pela salinidade do meio. / Aqueous drilling fluids are a widely used systemin the world to drill oil wells. This drilling system has been being developed excellent formulations for drilling initial sections with low temperature and low pressure in recent decades. However, the oil reserves in these conditions are increasingly scarce, ending up in the need for drilling fluids with better operational performance in the toughest conditions. Therefore, it has been reported in the literature the need for aqueous systems to operate at high temperatures and high pressures (HTHP). High temperatures of oil wells favor the chemical degradation of polymers (commonly reported in additive formulations currently in the literature and applied in operational situations), that can generate molecular weight reduction and viscosity losses. Microgels can be applied in vast industrie`s segments, highlighted in the oil field, as they are used in the estimulation of wells and in the Advanced Oil Recovery (EOR). In this work, the applicability of hydroxypropyl guar`s microgels (HPG), obtained by crosslinking the HPG with borate ions, was measured as the thermal stability in water based drilling fluids.The application HPG microgels in water-based drilling fluid has increased viscosity and the apparent volume of the filtrate reduced around 25 ? C. However, with the increase of temperature to 50 ?C, the viscosity of drilling fluids based on HPG microgels decreased from 85 mPa.s to 25,45 mPa.s. These results indicate that the use of microgels in aqueous drilling fluids is a promising alternative since the crosslinking agent has been properly selected, i.e., does not undergo deactivation with increasing temperature and is not affected by the salinity of the system.

Made available in DSpace on 2014-12-17T15:41:44Z (GMT). No. of bitstreams: 1 EmanuellaLFV.pdf: 2331935 bytes, checksum: 3f4df9b602349e41bf8ab4d2c561b59d (MD5) Previous issue date: 2009-01-14 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The clay swelling is today one of the major problems during the well drilling. Nearly 50% of clays that constitute shale expand easily in the presence of water molecules. During the drilling of a geological formation containing swelling clays, when is feasible the use of water base fluids, it is necessary to apply clay inhibitors. This avoids the incorporation of the cutting to the drilling fluid which is responsible for the wall swelling and crumbling. The aim of this work was to evaluate the synergistic behavior that occurs when swelling clay inhibitors are associated to NaCl and KCl salts. Three swelling clay inhibitors samples, INIB A, INIB B and INIB C, were analyzed. Each inhibitor was characterized by the amount of chlorides and active matter content. For the water-clay interaction evaluation in the presence of various fluids, it was used the Capillary Suction Timer (CST, Fann) and Linear Swell Meter (LSM 2000, Fann). For better interpretation of results, a Design of Experiments (DOE, Umetrics MODDE 7.0 TM) through Result Surface Methodology (RSM) was employed, taking into account the type, the swelling inhibitors concentration and the contact time with the clay. The results showed different efficiencies among the inhibitors employed, and the salt-inhibitors mixtures were more efficient than those products alone. However, for field operation, other parameters should be taking into account, as operational cost, environmental requests and time of application for each product / O inchamento das argilas, quando em contato com o fluido de perfura??o, tem sido um dos maiores vil?es na perfura??o de po?os de petr?leo. Aproximadamente 50 % das argilas que constituem um folhelho se expandem facilmente na presen?a de mol?culas de ?gua. Na perfura??o de camadas geol?gicas contendo folhelhos hidrat?veis, quando ? vi?vel a utiliza??o de fluidos ? base de ?gua, h? a necessidade de utiliza??o de inibidores de inchamento de argilas. Estes inibidores evitam que os s?lidos perfurados incorporem-se ao fluido, e impedem o inchamento e o desmoronamento das paredes dos po?os. Esta disserta??o teve como objetivo realizar um estudo sobre o comportamento sinerg?tico de inibidores de hidrata??o de argila quando associados aos sais de NaCl e KCl. Foram analisadas tr?s amostras de inibidores de inchamento de argila comerciais, INIB A, INIB B e INIB C. Cada inibidor foi caracterizado quanto ao teor de cloreto e de mat?ria ativa. Para avalia??o da intera??o ?gua-argila na presen?a dos diversos fluidos, amostras de argila ativada foram submetidas a testes de capilaridade no CST (Capilary Succion Timer) e de inchamento no LSM (Linear Swell Meter). Para melhor interpreta??o dos resultados, foi empregada an?lise estat?stica experimental (DOE), por metodologia de resposta de superf?cie (RSM), atrav?s do programa MODDE 7.0TM da Umetrics, em que se levou em considera??o o tipo, a concentra??o dos inibidores de inchamento e o tempo de contato com a argila. A an?lise dos resultados comprovou as diferen?as de efici?ncia entre os inibidores empregados e que misturas dos inibidores com sais s?o mais eficientes que os produtos individualmente. Entretanto, para opera??es de campo, outros par?metros devem ser levados em considera??o, tais como custo, exig?ncias dos ?rg?os ambientais e tempo de atua??o do produto

Made available in DSpace on 2014-12-17T15:42:26Z (GMT). No. of bitstreams: 1 FranciscaSHTP_TESE.pdf: 2918129 bytes, checksum: e712b711537d456c1dd4eaa0f003f3af (MD5) Previous issue date: 2013-04-01 / The construction of wells is one of the most important activities of the oil industry. The drilling process is the set of activities and operations to design, program and perform the opening thereof. During this process, the cuttings are removed by the drilling fluid, or mud, and carted to the surface. This fluid is injected into the drill string and returns to the surface through the annular space between the well walls and the drill string. After the descent of the column casing, the annular space between the casing string and the walls of the borehole is filled with cement so as to secure the spine and prevent any migration of fluids between the various permeable zones traversed by the well behind of the coating. To ensure the good quality of the cementation scrubbers are used mattresses which are pumped ahead of the cement slurry so as to avoid contamination of the drilling fluid paste, or vice versa, and assist in the removal of plaster, formed by drilling fluid of the borehole walls, thus enabling a better cement bond to the well. Within this context, this work aims to evaluate the efficiency of mattresses scrubbers, the basis of ionic and nonionic surfactants, on the removal of nonaqueous drilling fluid, based on n-paraffin in oil wells, and the compatibility between the Mattress relations washer / drilling fluid bed scrubber / cement paste mattress washer / cement slurry / drilling fluid and the drilling fluid / cement slurry using laboratory tests rheology, thickening time and compressive strength. Also technique was performed X-ray diffraction (XRD) for a more detailed analysis of these mixtures with hydrated cement paste. In compatibility tests the conditions of temperature and pressure used in the same laboratory procedure simulating the conditions of oil wells, the well is considered the depth of 800 m. The results showed that the compositions of the mattress washer nonionic, KMS obtained a 100% efficient in removing the non-aqueous drilling fluid, and the best formulation showed good results with respect to compliance testing / A constru??o de po?os ? uma das atividades mais importantes da ind?stria do petr?leo. O processo de perfura??o de po?os ? o conjunto de atividades e opera??es destinadas a projetar, programar e realizar a abertura dos mesmos. Durante este processo, os cascalhos s?o removidos pelo fluido de perfura??o, ou lama, e carreados at? a superf?cie. Este fluido ? injetado no interior da coluna de perfura??o e retorna ? superf?cie atrav?s do espa?o anular entre as paredes do po?o e a coluna de perfura??o. Ap?s a descida da coluna de revestimento, o espa?o anular entre a coluna de revestimento e as paredes do po?o ? preenchido com cimento, de modo a fixar a coluna e evitar que haja migra??o de fluidos entre as diversas zonas perme?veis atravessadas pelo po?o, por tr?s do revestimento. Para garantir a boa qualidade da cimenta??o, s?o utilizados os colch?es lavadores, que s?o bombeados ? frente da pasta de cimento, de modo a evitar a contamina??o da pasta pelo fluido de perfura??o, ou vice-versa, al?m de auxiliar na remo??o do reboco, formado pelo fluido de perfura??o, das paredes do po?o, possibilitando assim uma melhor ader?ncia do cimento ao po?o. Dentro deste contexto, este trabalho tem como objetivo avaliar a efici?ncia de colch?es lavadores, a base de tensoativos i?nico e n?o i?nico, na remo??o do fluido de perfura??o n?o aquoso, ? base de n-parafina, em po?os de petr?leo, e a compatibilidade entre as rela??es colch?o lavador/fluido de perfura??o, colch?o lavador /pasta de cimento, colch?o lavador /pasta de cimento/fluido de perfura??o e fluido de perfura??o/pasta de cimento utilizando os ensaios laboratoriais de reologia, tempo de espessamento e resist?ncia ? compress?o. Tamb?m foi realizada a t?cnica difra??o de raios X (DRX) para uma an?lise mais detalhada dessas misturas com a pasta hidratada de cimento. Nos ensaios de compatibilidade as condi??es de temperatura e press?o utilizadas nos procedimentos laboratoriais simularam as mesmas condi??es dos po?os de petr?leo, sendo a profundidade do po?o considerada de 800 m. Os resultados mostraram que as composi??es do colch?o lavador n?o i?nico, o KMS, obtiveram uma efici?ncia de 100% na remo??o do fluido de perfura??o n?o aquoso e a sua melhor formula??o apresentou resultados satisfat?rios em rela??o aos testes de compatibilidade

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2018-04-11T19:42:50Z No. of bitstreams: 1 SuzanIalyGomesDeMedeiros_TESE.pdf: 1565131 bytes, checksum: fc1c6f25f300c374ed29471679c7076b (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2018-04-13T00:33:30Z (GMT) No. of bitstreams: 1 SuzanIalyGomesDeMedeiros_TESE.pdf: 1565131 bytes, checksum: fc1c6f25f300c374ed29471679c7076b (MD5) / Made available in DSpace on 2018-04-13T00:33:30Z (GMT). No. of bitstreams: 1 SuzanIalyGomesDeMedeiros_TESE.pdf: 1565131 bytes, checksum: fc1c6f25f300c374ed29471679c7076b (MD5) Previous issue date: 2012-09-04 / Enzimas t?m sido largamente utilizadas em bioss?ntese para transforma??es de compostos org?nicos em substitui??o aos m?todos sint?ticos cl?ssicos. Este trabalho descreve a s?ntese enzim?tica de biossurfactantes a partir da Dglicose com ?cido ricinol?ico empregando como biocatalisador a protease de Bacillus subtillis alcalina. Com aux?lio do software MODDE 7.0, o planejamento experimental utilizando um modelo fatorial 2 4-1 (planejamento reduzido de 2 n?veis e 4 vari?veis) foi realizado para verificar a influ?ncia das vari?veis temperatura, tempo de rea??o, concentra??o de enzima e raz?o molar do substrato/D-glicose sobre o rendimento da rea??o. An?lises de espectroscopia na regi?o do infravermelho (FTIR) confirmaram a forma??o do produto atrav?s de absor??es em 3400 cm-1, caracter?stica das hidroxilas presentes no anel do a??car, e em 1739 cm-1, correspondente ? carbonila de ?ster. As an?lises de CLAE (cromatografia l?quida de alta efici?ncia) mostraram as taxas de convers?es alcan?adas pelo biocatalisador protease de Bacillus subtillis alcalina. Medidas de tens?o superficial em diferentes condi??es, foram realizadas com o produto de rea??o, onde observou-se redu??o da tens?o superficial da ?gua de 72 mN/m para 33 mN/m. Foi poss?vel verificar tamb?m a estabilidade quanto do produto frente as solu??es salinas (115 g/L), nas solu??es tamp?o com pH extremos de 2 ? 12 e em solu??es aquosas aquecidas no intervalo de 25 a 100 ?C. Visando aplica??o do produto em t?cnicas Core-Flow (transporte de ?leo), an?lises de ?ngulo de contato pelo m?todo da placa de Willemy foram realizadas, obtendo-se a redu??o do ?ngulo de contato, do vidro com ?gua, de 40? para 0?. Nas an?lises como lubrificante e redutor de filtrado em fluidos de perfura??o polim?ricos observou-se, nas v?rias formula??es, que a mistura biodiesel/biossurfactante apresentou resultados satisfat?rios reduzindo o CL (coeficiente de lubricidade) em 87% e o volume de filtrado em 22%. Nos testes de forma??o e estabilidade de espuma, caracter?stica que deve ser evitada por proporcionar leituras incorretas (peso espec?fico, reologia, volumetria, etc), nenhum dos biossurfactantes teve a??o espumante caracterizando seu bom desempenho. / Enzymes have been widely used for organic compounds biosynthesis, attracting a great deal of attention in recent years, due to its several advantages over the chemical method. This work describes the enzymatic synthesis of biosurfactants from d-glucose with ricinoleic acid using proteases Bacillus subtillis alcalina as biocatalysts. Aiming to reach high conversions from substrates to products for a possible future large scale industrial production, a serie of variables was optimized, through MODDE 7.0, using the factorial model design 24-1. The investigated variables were: temperature, reaction time, enzyme concentration and substrate/D-glicose rate. Qualitative analysis by infrared spectroscopy (FTIR) confirmed the product formation through characteristic peaks due to hydroxyl group absorption on the sugar ring at 3400 cm-1 and the carbonyl group at 1739 cm-1, which refers to ester carbonyl. HPLC analysis (High Performance Liquid Chromatography) showed higher conversions using of alkaline protease of Bacillus subtillis. Besides, it was observed that all the biosurfactants reduced the surface tension of water from 72 to 33 mN/m (by interpolate of the plate method). According to surface tension results, it was possible to evaluate the stability of each product about saline (maximum 115g/L) and buffer solutions (pH 2 ? 12), from a temperature range from 25 to 100?C). Aiming its application to core-flow technique, contact angle measurements presented reduction of 40? to 0? in presence of d-glucose ricinoleate, when compared to distillated water. Different applications of this product were investigated, such as: lubricant and filter loss control for polymeric drilling fluids of petroleum wells. It was observed the reduction of lubricity coefficient and filtrate loss control in 87 and 22 %, respectively.

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2017-05-03T18:45:04Z No. of bitstreams: 1 2016 - Renan Fraga Barbosa.pdf: 4950481 bytes, checksum: 7339d2f44b8f9102ca0d628cc4a99002 (MD5) / Made available in DSpace on 2017-05-03T18:45:04Z (GMT). No. of bitstreams: 1 2016 - Renan Fraga Barbosa.pdf: 4950481 bytes, checksum: 7339d2f44b8f9102ca0d628cc4a99002 (MD5) Previous issue date: 2016-08-25 / Funda??o de Apoio ? Pesquisa Cient?fica e Tecnol?gica da UFRRJ / The filtration loss is a phenomenon caused by the gradient pressure between the annular region and the rock formation during the drilling of an oil and gas well under overbalanced conditions. The invasion of fluids may provoke irreversible damages to the integrity of the well due to the solids present in their composition. Therefore, drilling fluids must be formulated in such a way that a low permeability mudcake with controlled thickness is formed in order to mitigate the filtration and invasion. Filtration cells are experimental apparatus used in the industry and at universities to study the mudcake growth in the rock formation and to measure the filtrate volume. Such devices operate off line and require a specialized operator. The objective of this work was to optimize, automate and validate a static filtration prototype cell that collected experimental data in real time. An experimental unit was built to prepare the fluids and to feed them into the filtration prototype. This unit is composed of a positive displacement pump, mixing tanks and sensors to monitor the properties of the fluid. The unit and the prototype compose the on line filtration unit. In the filtration prototype, valves and sensors were installed to operate remotely. A virtual interface was developed in order to manage the filtration unit. This interface is capable of monitoring the data provided by the sensors as well as operating the equipments (pump, agitators and automatic valves, including the ones in the filtration cell). Comparative experiments were performed in a HTHP off line filtration cell using similar operational conditions to validate the prototype. As results, the filtrate volume and the filtration properties (porosity and permeability of the mudcake) values obtained for both cells shown to be similar. The on line filtration unit was capable of reproducing the data provided by the off line filtration cell used as a model in this work. Thus, one can conclude that the on line filtration cell operates appropriately. / A filtra??o e a invas?o do fluido de perfura??o s?o fen?menos provocados pelo diferencial de press?o entre a regi?o anular e a forma??o rochosa durante a perfura??o de um po?o de petr?leo e g?s sob condi??es overbalance. A invas?o de fluidos e s?lidos presentes no fluido de perfura??o podem causar danos irrevers?veis ao po?o, portanto formulam-se os fluidos de modo que seja formado um reboco de baixa permeabilidade e espessura controlada, minimizando a filtra??o e a invas?o. Na ind?stria e na academia, para estudar o crescimento da torta na forma??o rochosa e avaliar o volume de filtrado, utilizam-se aparatos experimentais, denominados c?lulas de filtra??o, entretanto estes dispositivos s?o aparatos de bancada necessitam de um operador especializado. O objetivo desse trabalho foi otimizar, automatizar e validar um prot?tipo de filtra??o est?tica que coleta dados em linha e em tempo real. Para alimentar o fluido no prot?tipo de filtra??o, foi constru?da uma unidade de prepara??o de fluidos composta por uma bomba de deslocamento positivo, tanques de mistura e sensores para monitorar as propriedades do fluido. A unidade de preparo e o prot?tipo de filtra??o constituem a denominada unidade de filtra??o. No prot?tipo de filtra??o, foram instaladas v?lvulas e sensores para opera??o remota. Para gerenciar a unidade de filtra??o, foi desenvolvida uma interface virtual que monitora os dados fornecidos pelos sensores e opera os equipamentos (bomba, agitadores e as v?lvulas autom?ticas, inclusive as da c?lula de filtra??o). Para validar o prot?tipo, foram realizados experimentos comparativos com uma c?lula de filtra??o HTHP de bancada em condi??es de opera??o semelhantes. Como resultado das filtra??es na c?lula de bancada e com o prot?tipo, foi observado que o volume de filtrado e propriedades calculadas nos experimentos de filtra??o (porosidade e permeabilidade da torta) apresentaram valores similares indicando que a c?lula on line opera de forma adequada, reproduzindo os dados da c?lula de bancada que foi usada como modelo na proposta deste trabalho.