Core flood in porous micromodel made of glass

Resumo

Research using microdevices related to the flow in porous media are widely developed by the oil
industry, aiming to understand the behavior of fluids, the interactions between the phases and the porous structure,
and to increase the hydrocarbon recovery factor from the reservoirs. The objective of this work was to reproduce
core flood test that was done on a rock but using a microdevice and the same fluid from the Brazilian pre-salt.
Complex porous mesh micromodel was obtained through simulation, made of glass, and aged with crude oil, thus
changing its wettability for oil wetting. Synthetic desulfated seawater (DSW) was injected as secondary recovery,
at room temperature, with a flow rate of 1cm3/h and a bump flow of 2cm3/h. The experiment was recorded with
high resolution images and a computer simulation was performed for the DSW velocities inside the micromodel.
As a result of the image analysis, the recovery factor was calculated, which after the injection of 100 pore volumes
was approximately 11,21 %. With the increase in flow, 7,92 % more oil was produced. With this, the fabricated
microdevice has shown that it can be used to better understand fluid distribution and oil production in a core flood
test.