Guidelines for Numerically Modeling Co- and Counter-current Spontaneous Imbibition

Khan, Abdul Saboor; Siddiqui, Abdul Rafey; Salam, Abdul; Alyafei, Nayef

doi:10.1007/s11242-018-1093-3

Cited by 23 publications

(13 citation statements)

References 33 publications

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“…For the first boundary condition, oil could only be produced by counter-current imbibition (Rangel-German and Kovscek, 2006a;Mason et al, 2012). For the second boundary, oil is produced by combination of counter-and co-current imbibition (Khan et al, 2018). Oil production by countercurrent imbibition must overcome capillary back pressure, which is not needed for co-current imbibition.…”

Section: Introductionmentioning

confidence: 99%

Recent advances in spontaneous imbibition with different boundary conditions

Meng¹,

Cai²

2018

Capillarity

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Spontaneous imbibition plays an important role in many practical processes, such as oil recovery, hydrology, and environmental engineering. The past few years have witnessed a rapid development in the mechanism analysis and industry applications of spontaneous imbibition. In this paper, we focus on boundary conditions of spontaneous imbibition, which has important effects on the imbibition rate and efficiency. Various boundary conditions are first generated using different capillary model and introduced focusing on the fundamental physical mechanisms. Then, the studies of spontaneous imbibition in core scale are reviewed. The feature is discussed and the relative permeability for coand counter-current imbibition is analyzed. The scaling of imbibition data with different boundary conditions is also presented by combination of experimental and numerical methods. An analytical model to describe spontaneous imbibition is provided at the end.

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Section: Introductionmentioning

confidence: 99%

Recent advances in spontaneous imbibition with different boundary conditions

Meng¹,

Cai²

2018

Capillarity

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“…pressure conditions relies on equalizing the pressure at the upstream and downstream ends of the core by the addition of a tube that connects the inlet and outlet of the core (top illustration in Figure 1). With shrink tubing and confining pressure sealing the cylindrical surface of the sample, this configuration prevents a differential pressure from being applied during the imbibition experiment and thus satisfies the boundary conditions of cocurrent spontaneous imbibition (Khan et al, 2018;Pooladi-Darvish & Firoozabadi, 2000). The bypass tubing is connected to the tubing between the coreholder and the backpressure pump that is maintained at a constant pressure (Teledyne ISCO 1000D).…”

Section: Novel Cocurrent Spontaneous Imbibition Experimental Methodsmentioning

confidence: 99%

“…The impact of gravity on pressure distribution is neglected because the experiments were performed horizontally. In a vertically oriented core, gravity would have to be accounted for in the capillary pressure calculation (Bartels et al, 2019;Khan et al, 2018). The detailed governing equations, model formulation, and numerical implementation for this model can be found in the SI.…”

Section: 1029/2019gl084532mentioning

confidence: 99%

Spatial and Temporal Quantification of Spontaneous Imbibition

Zahasky

Benson

2019

Geophysical Research Letters

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Spontaneous imbibition—the process of a wetting fluid displacing a nonwetting fluid purely by capillary forces—is a ubiquitous phenomenon in porous and fibrous materials. Here we present a new experimental method for quantification of spontaneous imbibition in geologic materials. This method makes it possible to perform spontaneous imbibition under elevated pressure conditions relevant to environmental and energy resource applications. Computed tomography imaging reveals a new time‐independent scaling relationship that describes local imbibition rates as a function of water saturation. Imbibition capillary pressure curves are calculated with this wetting‐phase pressure and flow rate characterization, with no assumptions about the functional form, end point behavior, or scaling factors. Calculated end point capillary pressure is nonzero, in agreement with recent pore‐scale measurements of capillary pressure of trapped nonwetting phase. This work provides a new approach and insights into trapping and remobilization of nonwetting fluids in CO2 storage reservoirs and contaminated groundwater aquifers.

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“…The extremely high capillary‐driven pressure gradients during spontaneous imbibition require careful attention to model grid definition and often require very fine model discretization in the direction of imbibition (Khan et al., 2018; Pooladi‐Darvish & Firoozabadi, 2000). To determine the optimal grid discretization, a 1D grid refinement study was performed and is described in Appendix .…”

Section: Numerical Modeling Of Local Fluid Flow During Spontaneous Im...mentioning

confidence: 99%

Preferential Solute Transport in Low Permeability Zones During Spontaneous Imbibition in Heterogeneous Porous Media

Zahasky

Benson

2022

Water Resources Research

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Multiphase flows in porous media, and the associated solute transport processes, are controlled by a combination of gravity, capillary, and viscous forces. Geologic heterogeneity influences flow and transport processes, yet gaps exist in our understanding of how heterogeneity impacts capillary‐driven transport, such as during spontaneous imbibition. Here we use positron emission tomography, combined with a newly developed method for conducting spontaneous imbibition experiments, to observe solute transport into low permeability regions during imbibition. Using an experimentally parameterized 2D numerical model, we demonstrate how capillary‐driven flow near the imbibition front can carry solutes into low permeability regions. This process displaces solutes from high permeability zones, while the cumulative amount of solute in low permeability zones increases, opposite of what is observed under fully saturated solute transport conditions. These results highlight the complex flow and solute transport behavior that arise during multiphase displacements in heterogeneous geologic porous media.

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Guidelines for Numerically Modeling Co- and Counter-current Spontaneous Imbibition

Cited by 23 publications

References 33 publications

Recent advances in spontaneous imbibition with different boundary conditions

Recent advances in spontaneous imbibition with different boundary conditions

Spatial and Temporal Quantification of Spontaneous Imbibition

Preferential Solute Transport in Low Permeability Zones During Spontaneous Imbibition in Heterogeneous Porous Media

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