Made available in DSpace on 2014-12-17T15:01:18Z (GMT). No. of bitstreams: 1 DiegoAAG_partesautorizadas.pdf: 1805054 bytes, checksum: 0bbdfaaf4272f15a091664e96c012ed7 (MD5) Previous issue date: 2009-03-06 / This work presents studies related to the use of microemulsions in the solubilization of heavy crude oil fractions responsible by the formation of deposits. The first stage of the work was addressed to the construction of phases diagrams, with the intention of determining the area within which the microemulsion is formed. The following systems were studied: UNITOL L 90 n-Butanol - Water - Kerosene (system 1); UNITOL L 90 - n-Butanol - Water - Xylene (system 2); UNITOL L 90 n-Butanol - Water - Kerosene/Xylene 10% (system 3); UNITOL L 90 - Sec-Butanol - Water - Xylene (system 4). In parallel experiments of physical adsorption were carried out by the static method, with the intention of simulating natural conditions of reservoirs. Crude oil of the Fazenda Bel?m field (Rio Grande do Norte), was used as solute, xylene as solvent and the Assu sandstone (Rio Grande do Norte, Brazil) and Botucatu sandstone (Paran?, Brazil) as rock reservoirs. The curves of adsorption presented the S format type, in agreement with the classification proposed by Giles, Smith and Huitson (1974). The solubilization process was accomplished in the batch method, by varying the time of agitation, the microemulsions and the solid/solution ratio. The experiments showed that the microemulsions presented high efficiency in the solubilization of the crude oil adsorbed on the sandstones. System 2 presented an efficiency of 99% for the Assu sandstone and 97% for the Botucatu sandstone / No presente trabalho foi avaliado o desempenho das microemuls?es na solubiliza??o de fra??es pesadas do petr?leo, respons?veis pela forma??o de dep?sitos. A primeira fase do trabalho foi direcionada ? constru??o dos diagramas de fases, com o intuito de determinar a regi?o na qual a microemuls?o ? formada. Os seguintes sistemas foram estudados: UNITOL L 90 n-Butanol ?gua Querosene (sistema 1); Unitol L 90 n-Butanol ?gua Xileno (sistema 2); Unitol L 90 n-Butanol ?gua Querosene/Xileno 10% (sistema 3); Unitol L 90 Sec-Butanol ?gua Xileno (sistema 4). Em paralelo foram conduzidos experimentos de adsor??o f?sica pelo m?todo est?tico, com o intuito de simular condi??es naturais de reservat?rio. Utilizou-se ?leo bruto do campo de Fazenda Bel?m, (Petrobras - Rio Grande do Norte), xileno como solvente, arenito Assu (Rio Grande do Norte, Brasil) e arenito Botucatu (Paran?, Brasil) como rochas reservat?rio. As curvas de adsor??o foram enquadradas no formato S , de acordo com a classifica??o proposta por Giles, Smith & Huitson (1974). O processo de solubiliza??o foi realizado em regime de batelada, variando o tempo de agita??o, as microemuls?es e a raz?o arenito/microemuls?o. Ensaios mostraram que os sistemas apresentaram alta efici?ncia na solubiliza??o do ?leo bruto adsorvido sobre os arenitos. O sistema 2 apresentou uma efici?ncia de 99% para o arenito Assu e 97% para o arenito Botucatu