Oil/water displacement in microfluidic packed beds under weakly water-wetting conditions: competition between precursor film flow and piston-like displacement

Tanino, Yukie; Zacarias-Hernandez, Xanat; Christensen, Magali

doi:10.1007/s00348-018-2490-7

Cited by 31 publications

(22 citation statements)

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“…Previous studies also showed a weak dependence of ROS on Ca. Krummel et al (2013) found that ROS decreases significantly for Ca larger than 2 × 10 -4 but not for lower capillary numbers as used in our study (Krummel et al 2013;Tanino et al 2018). It is worth noting here that our findings were made at comparable capillary numbers but for smaller pore sizes and a higher (oil:water) viscosity ratio.…”

Section: Waterflooding Experimentsmentioning

confidence: 40%

“…The effective pixel size was 0.135 × 0.135 µm. The middle regions of the packed beds were visualized, while the downstream regions (300-400 µm close to the pillars) were excluded to avoid end effects (Tanino et al 2018). At each (X, Y) ROI, a series of images along the Z-direction was recorded over a range of 25 µm (in steps of 330 nm), at an exposure time of 100 ms per image.…”

Section: Image Acquisitionmentioning

confidence: 99%

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Optical measurements of oil release from calcite packed beds in microfluidic channels

Le-Anh

Rao

Ayirala

et al. 2020

Microfluid Nanofluid

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To enable the study of improved oil recovery (IOR) from carbonate rock via laboratory experiments at the pore scale, we have developed a novel microfluidic chip containing a 3D packed bed of calcite particles. The utilization of fluorescently labeled water phase enabled visualization up to 1-2 particle layers with confocal laser scanning microscopy. Porosity and residual oil saturation (ROS) in this space are quantified from image stacks in the depth direction (Z). To obtain reliable average ROS values, Z stacks are captured at various XY locations and sampled over several time-steps in the steady state. All image stacks are binarized using Otsu's method, subsequent to automated corrections for imperfect illumination and Z-drifts of the microscope stage. Low salinity IOR was mimicked using a packed bed that was initially saturated with water and then with mineral oil. Steady state ROS values showed no significant dependence on capillary number (Ca) in the range from 6 × 10-7 to 2 × 10-5. In contrast, chemical modification of the pore space via adsorption of water-extracted crude oil components yielded significantly higher ROS values, in agreement with a more oil-wet porous medium. These results indicate a good potential for using packed beds on a chip as an efficient screening tool for the optimization and development of different IOR methods.

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Section: Waterflooding Experimentsmentioning

confidence: 40%

Section: Image Acquisitionmentioning

confidence: 99%

Optical measurements of oil release from calcite packed beds in microfluidic channels

Le-Anh

Rao

Ayirala

et al. 2020

Microfluid Nanofluid

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show abstract

“…They used soda line glass spheres to represent silica; however, for other minerals they crushed rock or crystals. Tanino et al [ 137 , 138 ] used a similar micromodel with quasi-monolayer of crushed marble packed inside a channel to study mixed-wet conditions on oil recovery and film flow and piston-like displacement in oil/water two-phase flow. They used a variable wavelength light source and a high-speed 24-bit colour camera coupled with an optical microscope to image the depth-integrated fluid distribution.…”

Section: Microfluidic Devices (Physical Micromodels Of Porous Geommentioning

confidence: 99%

Review of Microfluidic Devices and Imaging Techniques for Fluid Flow Study in Porous Geomaterials

Jahanbakhsh

Wlodarczyk

Hand

et al. 2020

Sensors

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Understanding transport phenomena and governing mechanisms of different physical and chemical processes in porous media has been a critical research area for decades. Correlating fluid flow behaviour at the micro-scale with macro-scale parameters, such as relative permeability and capillary pressure, is key to understanding the processes governing subsurface systems, and this in turn allows us to improve the accuracy of modelling and simulations of transport phenomena at a large scale. Over the last two decades, there have been significant developments in our understanding of pore-scale processes and modelling of complex underground systems. Microfluidic devices (micromodels) and imaging techniques, as facilitators to link experimental observations to simulation, have greatly contributed to these achievements. Although several reviews exist covering separately advances in one of these two areas, we present here a detailed review integrating recent advances and applications in both micromodels and imaging techniques. This includes a comprehensive analysis of critical aspects of fabrication techniques of micromodels, and the most recent advances such as embedding fibre optic sensors in micromodels for research applications. To complete the analysis of visualization techniques, we have thoroughly reviewed the most applicable imaging techniques in the area of geoscience and geo-energy. Moreover, the integration of microfluidic devices and imaging techniques was highlighted as appropriate. In this review, we focus particularly on four prominent yet very wide application areas, namely “fluid flow in porous media”, “flow in heterogeneous rocks and fractures”, “reactive transport, solute and colloid transport”, and finally “porous media characterization”. In summary, this review provides an in-depth analysis of micromodels and imaging techniques that can help to guide future research in the in-situ visualization of fluid flow in porous media.

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“…Fabrication of geomaterial microfluidics has received attention in the fields of hydrology and petroleum engineering, in which pore-scale flow and/or transport is often dictated by surface chemistry (Bowden et al 2016;Gerami et al 2017;Mahoney et al 2015Mahoney et al , 2017Morais et al 2016;Oh et al 2017;Porter et al 2015b;Song et al 2014;Tanino et al 2018;Wang et al 2017;Zhang et al 2018). In Fig.…”

Section: Geomaterials Microfluidicsmentioning

confidence: 99%

Microfluidics for Porous Systems: Fabrication, Microscopy and Applications

et al. 2018

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No matter how sophisticated the structures are and on what length scale the pore sizes are, fluid displacement in porous media can be visualized, captured, mimicked and optimized using microfluidics. Visualizing transport processes is fundamental to our understanding of complex hydrogeological systems, petroleum production, medical science applications and other engineering applications. Microfluidics is an ideal tool for visual observation of flow at high temporal and spatial resolution. Experiments are typically fast, as sample volume is substantially low with the use of miniaturized devices. This review first discusses the fabrication techniques for generating microfluidics devices, experimental setups and new advances in microfluidic fabrication using three-dimensional printing, geomaterials and biomaterials. We then address multiphase transport in subsurface porous media, with an emphasis on hydrology and petroleum engineering applications in the past few decades. We also cover the application of microfluidics to study membrane systems in biomedical science and particle sorting. Lastly, we explore how synergies across different disciplines can lead to innovations in this field. A number of problems that have been resolved, topics that are under investigation and cutting-edge applications that are emerging are highlighted. Keywords Microfluidics • Porous media • Flow visualization • On-a-chip applications • Lab-on-a-chip • Micromodels Alireza Gerami and Yara Alzahid have contributed equally to this manuscript.

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Oil/water displacement in microfluidic packed beds under weakly water-wetting conditions: competition between precursor film flow and piston-like displacement

Cited by 31 publications

References 50 publications

Optical measurements of oil release from calcite packed beds in microfluidic channels

Optical measurements of oil release from calcite packed beds in microfluidic channels

Review of Microfluidic Devices and Imaging Techniques for Fluid Flow Study in Porous Geomaterials

Microfluidics for Porous Systems: Fabrication, Microscopy and Applications

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