Made available in DSpace on 2014-12-17T15:01:25Z (GMT). No. of bitstreams: 1 JoselisseSCS_DISSERT_partes autorizadas.pdf: 100593 bytes, checksum: 6e0be4155f59bdd61810503b91014cbc (MD5) Previous issue date: 2010-11-10 / The objective of this study was to evaluate the displacement of petroleum/diesel solutions, at different concentrations, observing the effect of ultrasonic vibrations in fluids present in porous media to obtain an increase in oil production. The bubbles produced by ultrasound implode asymmetrically in the rock, generating liquid jets with high speed, displacing the oil present in porous media. The oil/diesel solutions were prepared with concentrations ranging from 20 g/L to 720 g/L in oil in relation to diesel and its viscosities were obtained in a Brookfield Rheometer RS2000, with temperature ranging from 25 to 55 ?C. After, calculations were performed to obtain the activation energy data for oil/diesel solutions. For oil recovery experiments, cylindrical samples of porous rock (core samples), with resin around the perimeter and its two circular bases free to allow the passage of fluids, were first saturated with 2% KCl solution and after with oil solutions. The results of oil extraction were satisfactory for all studied solutions, being obtained up to 68% partial displacement with saline solution injection. The ultrasound system was used after saline injection, increasing oil displacement, with oil extractions ranging from 63% to 79%. During the experiments, it was observed the warming of core samples, helping to reduce the viscosity of more concentrated systems, and consequently enhancing the percentage of advanced recovery for all studied solutions / O objetivo desse trabalho foi avaliar o deslocamento de solu??es de petr?leo/diesel, em diferentes concentra??es, observando o efeito das vibra??es ultrass?nicas no deslocamento dos fluidos presentes em meio poroso para obter um aumento na produ??o de petr?leo. As bolhas formadas pelo ultrassom implodem na rocha de forma assim?trica, gerando jatos de l?quido em alta velocidade, deslocando o ?leo do meio poroso. As solu??es foram preparadas em concentra??es variadas de 20 g/L a 720 g/L em ?leo com rela??o ao solvente diesel e suas viscosidades analisadas em um Re?metro Brookfield RS2000, com intervalos de temperaturas de 25 a 55 ?C. Em seguida, foram realizados c?lculos para obten??o dos dados de energia de ativa??o das solu??es ?leo/diesel. Para a realiza??o dos experimentos de recupera??o de petr?leo foram utilizadas amostras de rochas porosas cil?ndricas (plugs) resinadas na lateral deixando as extremidades livres para a transposi??o dos fluidos at? a satura??o, inicialmente com solu??o de KCl (2%) e posteriormente com as solu??es de petr?leo. Foram obtidos resultados satisfat?rios da extra??o para todas as solu??es estudadas, obtendo-se um deslocamento parcial por meio de inje??o salina de at? 68%. Ap?s este estudo foi utilizado o sistema de ultrassom, que ajudou ainda mais no deslocamento final, obtendo-se extra??es que variaram entre 63% e 79% de petr?leo. Durante os experimentos ocorreu um aquecimento nos plugs, que auxiliou na diminui??o da viscosidade dos sistemas mais concentrados, e consequentemente aumentou os percentuais de recupera??o avan?ada para todas as solu??es estudadas