Dynamics of Drying in 3D Porous Media

Xu, Lei; Davies, S.N.; Schofield, Andrew B.; Weitz, David A.

doi:10.1103/physrevlett.101.094502

Cited by 142 publications

(179 citation statements)

References 19 publications

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“…Our model can be extended to three dimensions, where the hydrodynamics in the bulk fluid are described by the Navier-Stokes equations. This three-dimensional description will allow us to compare the dynamics of interfacial jumps with direct observations at the pore scale [78,[116][117][118][119] and evaporation rates in porous media at the macroscopic scale [120,121]. …”

Section: Discussionmentioning

confidence: 99%

Pore-scale modeling of phase change in porous media

Cueto‐Felgueroso

Juanes

2018

Phys. Rev. Fluids

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The combination of high-resolution visualization techniques and pore-scale flow modeling is a powerful tool used to understand multiphase flow mechanisms in porous media and their impact on reservoir-scale processes. One of the main open challenges in pore-scale modeling is the direct simulation of flows involving multicomponent mixtures with complex phase behavior. Reservoir fluid mixtures are often described through cubic equations of state, which makes diffuse-interface, or phase-field, theories particularly appealing as a modeling framework. What is still unclear is whether equation-of-state-driven diffuse-interface models can adequately describe processes where surface tension and wetting phenomena play important roles. Here we present a diffuse-interface model of single-component two-phase flow (a van der Waals fluid) in a porous medium under different wetting conditions. We propose a simplified Darcy-Korteweg model that is appropriate to describe flow in a Hele-Shaw cell or a micromodel, with a gap-averaged velocity. We study the ability of the diffuse-interface model to capture capillary pressure and the dynamics of vaporization-condensation fronts and show that the model reproduces pressure fluctuations that emerge from abrupt interface displacements (Haines jumps) and from the breakup of wetting films.

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Section: Discussionmentioning

confidence: 99%

Pore-scale modeling of phase change in porous media

Cueto‐Felgueroso

Juanes

2018

Phys. Rev. Fluids

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“…These parameters are not necessarily equal to the averages determined from the pore-size distribution because typically only fractions of the connected pore space are subject to Haines jump hysteresis. To date, the experimental quantification of pore-scale displacement dynamics has been based on constricted glass capillaries, artificial micromodels (17), glass bead packs (18), and other model systems (19) that allow in situ optical access (4). However, these systems differ from most natural systems in dimensionality (20), flow regime (18), and the degree to which displacement events contribute to energy dissipation (15,16).…”

Section: Filling Of Pore Spacementioning

confidence: 99%

Real-time 3D imaging of Haines jumps in porous media flow

Berg

Ott

Klapp

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

547

460

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Newly developed high-speed, synchrotron-based X-ray computed microtomography enabled us to directly image pore-scale displacement events in porous rock in real time. Common approaches to modeling macroscopic fluid behavior are phenomenological, have many shortcomings, and lack consistent links to elementary porescale displacement processes, such as Haines jumps and snap-off. Unlike the common singular pore jump paradigm based on observations of restricted artificial capillaries, we found that Haines jumps typically cascade through 10-20 geometrically defined pores per event, accounting for 64% of the energy dissipation. Real-time imaging provided a more detailed fundamental understanding of the elementary processes in porous media, such as hysteresis, snapoff, and nonwetting phase entrapment, and it opens the way for a rigorous process for upscaling based on thermodynamic models.hydrology | oil recovery | multiphase flow

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“…These observations remain largely unexplained, and thus far inaccessible to both pore-scale and continuum models. A reason for this challenge is, in our view, the importance of nonlocal effects at the front [10,[50][51][52].…”

Section: Introductionmentioning

confidence: 99%

Stabilizing Fluid-Fluid Displacements in Porous Media Through Wettability Alteration

2015

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We study experimentally how wettability impacts fluid-fluid-displacement patterns in granular media. We inject a low-viscosity fluid (air) into a thin bed of glass beads initially saturated with a more-viscous fluid (a water-glycerol mixture). Chemical treatment of glass surfaces allows us to control the wetting properties of the medium and modify the contact angle θ from 5°(drainage) to 120°(imbibition). We demonstrate that wettability exerts a powerful influence on the invasion morphology of unfavorable mobility displacements: increasing θ stabilizes fluid invasion into the granular pack at all capillary numbers. In particular, we report the striking observation of a stable radial displacement at low capillary numbers, whose origin lies on the cooperative nature of fluid invasion at the pore scale.

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Dynamics of Drying in 3D Porous Media

Cited by 142 publications

References 19 publications

Pore-scale modeling of phase change in porous media

Pore-scale modeling of phase change in porous media

Real-time 3D imaging of Haines jumps in porous media flow

Stabilizing Fluid-Fluid Displacements in Porous Media Through Wettability Alteration

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