Roughness Control on Multiphase Flow in Rock Fractures

Hu, Ran; Zhou, Chen‐Xing; Wu, Dong-Sheng; Yang, Zhibing; Chen, Yifeng

doi:10.1029/2019gl084762

Cited by 46 publications

(32 citation statements)

References 66 publications

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“…10.1029/2020GL089682 this work is relatively close to that other experiments, the values of specific θ * and Ca* alter little (Hu, Zhou, et al, 2019). The parameters λ 1 , λ 2 , λ 3 , and λ 4 , depending on l, already determined in Figure 3, are also used in the model prediction in Figure 4.…”

Section: Evaluation Of the Theoretical Model And The Phase Diagramsupporting

confidence: 82%

“…However, given that σ and a are, respectively, included in Ca = Uμ i / σ and

l = 2 \overset{r}{true} / a

, there is only one parameter l that affects the boundary curves. Such a parameter l is determined as l = 0.7 in Hu, Zhou, et al (2019) and l = 0.85 in Zheng et al (2017). Correspondingly, the predicted phase diagrams are shown separately in Figures 4a and 4b.…”

Section: Resultsmentioning

confidence: 99%

“…Note that the disorder and the correlation length are also important factors controlling fluid displacement. Previous works have shown that disorder promotes the selectivity of invasion and destabilizes displacement patterns (Holtzman, 2016; Hu, Zhou, et al, 2019), which results in a longer fluid‐fluid interface length, a lower fractal dimension, and lower displacement efficiency. Here, we mainly consider one realization of pore geometry in the experiments and simulations.…”

Section: Resultsmentioning

confidence: 99%

“…(a) (b) Figure 4. Evaluation of the phase diagram using the experimental results in (a) this work and in the existing works of (a) Hu, Zhou, et al (2019) and (b) Zheng et al (2017). The experimental data is denoted by the circle (CD), diamond (CZ), square (CF), and triangle (VF).…”

Section: Data Availability Statementmentioning

confidence: 99%

“…They proposed Burst, Touch, and Overlap to elucidate how these pore‐filling events control invasion patterns. Under quasi‐static conditions, as the invading fluid contact angle θ decreases from 180° to 45°, invasion patterns shift from CF to CD (Cieplak & Robbins, 1988; Hu et al, 2019; Jung et al, 2016). The critical θ increases with porosity and decreases with the disorder of porous media (Holtzman, 2016; Koiller et al, 1992).…”

Section: Introductionmentioning

confidence: 99%

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Transitions of Fluid Invasion Patterns in Porous Media

Lan

Yang

et al. 2020

Geophysical Research Letters

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Fluid invasion into porous media to displace a more viscous fluid exhibits various displacement patterns. For such unfavorable displacements, previous works overlooked the dynamic effect of viscous force on pattern transitions at low flow rates. Consequently, the crossover from compact displacement to capillary fingering under various wetting conditions remains unclear. Here, we establish a theoretical model to capture pattern transitions affected by wettability and flow rate. We rigorously quantify the dynamic effect of viscous force and find that critical contact angles for the crossover from compact displacement to capillary fingering decrease with capillary number. Our model also well describes transitions from capillary fingering to the crossover to viscous fingering. The predicted phase diagram exhibits good agreement with our pore-scale simulations and microfluidic experiments and is highly consistent with existing experiments. This work extends the classic phase diagram under unfavorable conditions and is of practical significance in subsurface applications. Plain Language Summary Fluid invasion into porous media saturated with another more viscous, immiscible fluid exhibits various displacement patterns. The patterns are controlled by the competition between capillary and viscous forces and significantly affect oil recovery and CO 2 trapping efficiency. Although invasion patterns have been studied intensively, the dynamic effect of viscous force on pattern transitions is neglected. The crossovers from compact displacement to capillary fingering are not well understood. To explore pattern transitions affected by wettability and flow rate, we perform theoretical analysis of flow behavior at the pore scale, and then establish a model to describe pattern transitions as functions of contact angle and capillary number. We rigorously consider the dynamic effect of viscous force and find that the critical contact angles for the crossover from compact displacement to capillary fingering decrease with capillary number. The model also well describes the crossover from capillary to viscous fingering. We evaluate the phase diagram using pore-scale simulations, and microfluidic experiments performed in this and previous studies, justifying that the diagram can well capture the transitions under various wetting and flow-rate conditions. This work extends the classic phase diagram and is also of practical significance in predicting displacement patterns in subsurface applications.

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Section: Evaluation Of the Theoretical Model And The Phase Diagramsupporting

confidence: 82%

“…However, given that σ and a are, respectively, included in Ca = Uμ i / σ and

l = 2 \overset{r}{true} / a

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Data Availability Statementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Transitions of Fluid Invasion Patterns in Porous Media

Lan

Yang

et al. 2020

Geophysical Research Letters

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Visualization of Multiphase Reactive Flow and Mass Transfer in Functionalized Microfluidic Porous Media

Wei,

Sha,

Chen

et al. 2024

Small

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Multiphase reactive flow in porous media is an important research topic in many natural and industrial processes. In the present work, photolithography is adopted to fabricate multicomponent mineral porous media in a microchannel, microfluidics experiments are conducted to capture the multiphase reactive flow, methyl violet 2B is employed to visualize the real‐time concentration field of the acid solution and a sophisticated image processing method is developed to obtain the quantitative results of the distribution of different phases. With the advanced methods, experiments are conducted with different acid concentration and inlet velocity in different porous structures with different phenomena captured. Under a low acid concentration, the reaction will be single phase. In the gaseous cases with higher acid concentration, preferential flow paths with faster flow and reaction are formed by the multiphase hydrodynamic instabilities. In the experiments with different inlet velocities, it is observed that a higher inlet velocity will lead to a faster reaction but less gas bubbles generated. In contrast, more gas bubbles would be generated and block the flow and reaction under a lower inlet velocity. Finally, in heterogeneous structures, fractures or cavities would significantly redirect the flow and promote the formation of preferential flow path nearby.

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The Investigation into Sand Production Under Supercritical Carbon Dioxide (SC-CO2) Flooding in Sandstone Reservoirs Using the Resolved CFD-DEM Method

Wang,

Zhang,

et al. 2024

Rock Mech Rock Eng

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Roughness Control on Multiphase Flow in Rock Fractures

Cited by 46 publications

References 66 publications

Transitions of Fluid Invasion Patterns in Porous Media

Transitions of Fluid Invasion Patterns in Porous Media

Visualization of Multiphase Reactive Flow and Mass Transfer in Functionalized Microfluidic Porous Media

The Investigation into Sand Production Under Supercritical Carbon Dioxide (SC-CO2) Flooding in Sandstone Reservoirs Using the Resolved CFD-DEM Method

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