Análise da injeção de água de baixa salinidade na recuperação de óleo em microdispositivos de sistemas porosos de PDMS

Abstract

Enhanced oil recovery research is based in the better understanding of the fluid flow inside de porous. The more common experiments are the corefloodings, very expensive, take a long time to perform and the limitation to get similar core samples to test. In this sense, microfluidics, already part of other research areas: health, pharmaceutical, physics, chemistry, emerged like an alternative to develop representative porous medias, able to visualize flow in porous scale, reproduce similar porous structures, reduction the materials in each test and save time, facilitating the interpretation the results. This research manufactured PDMS porous media micromodels with porous structure similar of the reservoir rock samples and tested different brine, with separated ions, to identify the relation between ionic charges and oil recovery factor. In the end, the low salinity NaCl brine (5.000 ppm) presented an incremental around 5% in comparison to high salinity NaCl brine (35.000 ppm).