Avaliação da aplicação de microemulsão, nanoemulsão e solução de tensoativo na recuperação avançada de petróleo

• Autor(a) principal: Oliveira, Andrey Costa de
• Data de Publicação: 2015
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/38330
• topic: Tensoativo; Microemulsão; Nanoemulsão; Recuperação avançada de petróleo; Surfactant; Microemulsion; Surfactant; Microemulsion; Nanoemulsion; Advanced oil recovery; Química de Interfaces

One of the main reasons that led to the development of technologies for oil recovery is the low percentage of naturally produced oil, i.e. so that the oil well itself, by pressure differential, reaches the surface. Over time, the pressure that causes the oil reach the surface decreases, leaving much of the hydrocarbons in the well. Because of this, it is important to use conventional and advanced recovery methods. This study has as objective the application of surfactant, microemulsion and nanoemulsion as advanced method in order to remove as many as possible of the remaining oil in the reservoir. The surfactant used is nonionic and liquid. Tests were performed to determine the critical micelle concentration (c.m.c.). It was also done the ternary diagram, built with components: butanol, kerosene and distilled water. The microemulsion point to be applied was chosen in a stable region of Winsor IV and with a high percentage of the aqueous phase. The nanoemulsion was obtained from a microemulsion point, the method used was the infinite dilution. Once defined the microemulsion and nanoemulsion point to be worked, the systems (microemulsion, nanoemulsion and surfactant solution) were characterized by surface tension, interfacial tense, particle diameter, polydispersity, density and viscosity. Finally, the systems were applied to oil recovery tests to determine their effect on advanced recovery. The tests were done in a reservoir Simulator with controlled temperatures and pressures, where it was possible to calculate the percentage of the injected fluid recovery to move the oil impregnated in the pores of the rock and the efficiency of the ending offset. Because the characteristics of systems that determine the interactions occurring in the reservoir, was observed that the microemulsion had the best oil recovery, with 85% of oil recovered, followed by the nanoemulsion and surfactant solution, with 70% and 60% of oil recovered, respectively.