Wettability effect on oil recovery using rock-structured microfluidics

Yang, Junyi; Saadat, Marzieh; Azizov, Ilgar; Dudek, Marcin; Øye, Gisle; Tsai, Peichun Amy

doi:10.1039/d1lc01115d

Cited by 6 publications

(3 citation statements)

References 72 publications

(148 reference statements)

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“…2020; Yang et al. 2022). Today, we have a fairly good understanding of how the interplay between , and impacts fluid–fluid displacement in porous media with spatially uniform wettability (Primkulov et al.…”

Section: Introductionmentioning

confidence: 99%

“…imbibition), the fluid-fluid displacement pattern is generally more compact than the opposite case (i.e. drainage) (Holtzman & Segre 2015;Zhao et al 2016;Primkulov et al 2018;Lan et al 2020;Yang et al 2022). Today, we have a fairly good understanding of how the interplay between Ca, M and θ impacts fluid-fluid displacement in porous media with spatially uniform wettability (Primkulov et al 2021).…”

Section: Introductionmentioning

confidence: 99%

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Characteristics of fluid–fluid displacement in model mixed-wet porous media: patterns, pressures and scalings

et al. 2023

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We study numerically the characteristics of fluid–fluid displacement in simple mixed-wet porous micromodels using a dynamic pore network model. The porous micromodel consists of distinct water-wet and oil-wet regions, whose fractions are varied systematically to yield a variety of displacement patterns over a wide range of capillary numbers. We find that the impact of mixed-wettability is most prominent at low capillary numbers, and it depends on the complex interplay between wettability fraction and the intrinsic contact angle of the water-wet regions. For example, the fractal dimension of the displacement pattern is a monotonically increasing function of wettability fraction in flow cells with strongly water-wet clusters, but it becomes non-monotonic with respect to wettability fraction in flow cells with weakly water-wet clusters. Additionally, mixed-wettability also manifests itself in the injection pressure signature, which exhibits fluctuations especially at low wettability fraction. Specifically, preferential filling of water-wet regions leads to reduced effective permeability and higher injection pressure, even at vanishingly small capillary numbers. Finally, we demonstrate that scaling analyses based on a weighted average description of the overall wetting state of the mixed-wet system can effectively capture the variations in observed displacement pattern morphology.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characteristics of fluid–fluid displacement in model mixed-wet porous media: patterns, pressures and scalings

et al. 2023

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“…The displacement experiment is an effective method for exploring both flow patterns and the efficiency of utilization by employing microfluidic models, − real sandstone models, ,,, and technologies such as nuclear magnetic resonance, − laser confocal techniques, − and CT scanning technology. − CT scanning technology has emerged as a significant method used in various fields, including but not limited to enhanced oil recovery (EOR), − carbon dioxide storage, , environmental remediation, , and reservoir modeling at the pore scale. − The nondestructive and high-accuracy evaluation offered by CT scanning technology places it at the forefront of the choices for the study of the flow pattern and distribution of residual oil. For example, Zhang et al utilized in situ CT scanning and QEMSCAN to acquire multicomponent 3D digital models and investigate the impact of wetting on microscale residual oil.…”

Section: Introductionmentioning

confidence: 99%

Flow Patterns and Pore Structure Effects on Residual Oil during Water and CO₂ Flooding: In Situ CT Scanning

Zhang,

Lin,

Ren

2023

Energy Fuels

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Carbon dioxide (CO 2 ) enhanced oil recovery (EOR) is an important technology to achieve carbon neutrality by sequestering CO 2 underground while simultaneously recovering crude oil. Reservoir pore structure is a key factor influencing CO 2 EOR. In this study, we utilized advanced online in situ CT scanning and digital rock techniques to obtain, for the first time, evolution profiles of the finger area during water flooding and CO 2 flooding processes, quantitatively assessing the differences in fluid patterns. Additionally, we first introduced an innovative approach using advanced machine learning techniques, especially XGBoost and SHAP, to construct a predictive model of the relative change of oil phase occupancy (RCPOC) based on pore structure parameters and evaluated the importance of each pore structure parameter. Importantly, our results revealed that CO 2 can significantly increase the sweep efficiency area while substantially reducing residual oil saturation, in stark contrast to the relatively uniform water front observed during water flooding. Furthermore, we elucidated the critical role of capillary forces, demonstrating that water flooding primarily extracts trapped oil from small pores, while CO 2 flooding effectively extracts oil from larger pores. During CO 2 flooding, there is a positive correlation between coordination number, mean throat radius (MeanTR), and mean throat length (MeanTL) and the change in oil occupancy, whereas their influence during water flooding is limited. In summary, this study contributes to the understanding of flow patterns and pore structure effects on residual oil during water flooding and the CO 2 flooding processes. It also provides a novel approach based on pore structure parameters to predict RCPOC and assess the importance of influencing factors, thereby expanding our research perspective on this issue.

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Liquid foam: Fundamentals, rheology, and applications of foam displacement in porous structures

Moradpour,

Yang,

Tsai

2024

Current Opinion in Colloid & Interface Science

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Wettability effect on oil recovery using rock-structured microfluidics

Abstract: Surface wettability has a crucial impact on drop splashing, emulsion dynamics, slip flow for drag reduction, fluid-fluid displacement, and various microfluidic applications. Targeting enhanced oil recovery (EOR) applications, we experimentally...

Cited by 6 publications

References 72 publications

Characteristics of fluid–fluid displacement in model mixed-wet porous media: patterns, pressures and scalings

Characteristics of fluid–fluid displacement in model mixed-wet porous media: patterns, pressures and scalings

Flow Patterns and Pore Structure Effects on Residual Oil during Water and CO₂ Flooding: In Situ CT Scanning

Liquid foam: Fundamentals, rheology, and applications of foam displacement in porous structures

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Wettability effect on oil recovery using rock-structured microfluidics

Abstract: Surface wettability has a crucial impact on drop splashing, emulsion dynamics, slip flow for drag reduction, fluid-fluid displacement, and various microfluidic applications. Targeting enhanced oil recovery (EOR) applications, we experimentally...

Cited by 6 publications

References 72 publications

Characteristics of fluid–fluid displacement in model mixed-wet porous media: patterns, pressures and scalings

Characteristics of fluid–fluid displacement in model mixed-wet porous media: patterns, pressures and scalings

Flow Patterns and Pore Structure Effects on Residual Oil during Water and CO2 Flooding: In Situ CT Scanning

Liquid foam: Fundamentals, rheology, and applications of foam displacement in porous structures

Contact Info

Product

Resources

About

Flow Patterns and Pore Structure Effects on Residual Oil during Water and CO₂ Flooding: In Situ CT Scanning