Abstract
The essential advantages of microfluidic studies are the excellent visualization of the processes of oil displacement from the porous medium model, simple cleaning, and the possibility of the repeated use of the microfluidic chip. The present article deals with the process of oil displacement by suspension flooding using a microfluidic chip, simulating a porous medium, and the suspensions of silicon dioxide nanoparticles (22 nm). The mass concentration of nanoparticles in suspensions ranged from 0.1 to 2 wt%. Five mass concentrations (0.125 wt%, 0.25 wt%, 0.5 wt%, 1 wt% and 2 wt%) were considered. The article presents the experimental photographs of the oil displacement process by water and SiO2 suspension. It is shown that, with the increasing concentration of nanoparticles, the oil recovery factor increases. A significant effect is observed at 0.5 wt% concentration of nanoparticles. It is shown that the increase in oil recovery during flooding by SiO2 suspension with the maximum concentration was 16%.
Highlights
Less than half of the initial oil is extracted during the main production [1,2].A slight improvement in oil recovery will lead to a colossal amount of additional extracted oil on the scale of fields
An application has been developed to estimate the oil recovery factor based on obtained photographs of the distribution of oil and the displacing fluid in the pore space of the microfluidic chip
A series of experiments using a microfluidic porous chip was conducted to study the process of flooding with SiO2 nanosuspensions
Summary
Less than half of the initial oil is extracted during the main production [1,2]. Nanomaterials 2022, 12, 520 of the composition of displacing fluids to increase oil recovery during flooding, as well as the study of the permeability of a microporous medium. It was shown that using SiO2 nanoparticle solutions with anionic surfactant improves oil recovery factor from a core with an inhomogeneous pore size distribution by 8.6%. The authors of [33] prepared nanofluids based on water and surfactants with amphiphilic Janus-SiO2 nanoparticles They found that oil recovery can be increased by. 10% at a nanoparticle concentration of 0.15 wt% This is because the amphiphilic Janus-SiO2 can increase the sweep efficiency of the surfactants and reduce the interfacial tension of the oil–water emulsion, thereby enhancing oil recovery with water flooding. The effects of nanoparticle concentration and size, displacement fluid flow rate, oil viscosity and core permeability were considered. The article shows oil and suspensions flow patterns during flooding, as well as the effect of the SiO2 nanoparticle concentration on enhancing oil recovery
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