masterThesis
Aplicação de ultrassons no deslocamento de petróleo em meio poroso
Fecha
2010-11-10Registro en:
SANTOS, Joselisse Soares de Carvalho. Ultrasound application to promote petroleum displacement in porous media. 2010. 106 f. Dissertação (Mestrado em Pesquisa e Desenvolvimento de Tecnologias Regionais) - Universidade Federal do Rio Grande do Norte, Natal, 2010.
Autor
Santos, Joselisse Soares de Carvalho
Resumen
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