Near miscible relative permeability curves in layered porous media- investigations via diffuse interface Lattice Boltzmann method

Ghasemi, Shahab; Moradi, Bijan; Rasaei, Mohammad Reza; Rahmati, Negin

doi:10.1016/j.petrol.2021.109744

Cited by 12 publications

(2 citation statements)

References 34 publications

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“…Such scalable implementations of physically accurate LB models across all relevant scales provide significant improvements in available computational power [9]. LB is used in various applications, such as heat transfer, aerodynamics, flow through permeable media and wave propagation [8][9][10][11], prediction of absolute, and relative permeability in conventional reservoir development, such as in sandstones [9,[12][13][14], investigation of the effect of fluid and geometrical properties on wettability, capillary pressure, and relative permeability [15][16][17]. Wettability alteration phenomena in porous media is studied using LB extensively as a part of CO2 sequestration and EOR processes [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Scalable Simulation of Pressure Gradient-Driven Transport of Rarefied Gases in Complex Permeable Media Using Lattice Boltzmann Method

Rustamov

Douglas

Aryana

2022

Fluids

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Accurate representations of slip and transitional flow regimes present a challenge in the simulation of rarefied gas flow in confined systems with complex geometries. In these regimes, continuum-based formulations may not capture the physics correctly. This work considers a regularized multi-relaxation time lattice Boltzmann (LB) method with mixed Maxwellian diffusive and halfway bounce-back wall boundary treatments to capture flow at high Kn. The simulation results are validated against atomistic simulation results from the literature. We examine the convergence behavior of LB for confined systems as a function of inlet and outlet treatments, complexity of the geometry, and magnitude of pressure gradient and show that convergence is sensitive to all three. The inlet and outlet boundary treatments considered in this work include periodic, pressure, and a generalized periodic boundary condition. Compared to periodic and pressure treatments, simulations of complex domains using a generalized boundary treatment conserve mass but require more iterations to converge. Convergence behavior in complex domains improves at higher magnitudes of pressure gradient across the computational domain, and lowering the porosity deteriorates the convergence behavior for complex domains.

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Section: Introductionmentioning

confidence: 99%

Scalable Simulation of Pressure Gradient-Driven Transport of Rarefied Gases in Complex Permeable Media Using Lattice Boltzmann Method

Rustamov

Douglas

Aryana

2022

Fluids

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“…The results provide interesting insights into the dynamics of capillary rising at early times. Furthermore, the details of relative permeability curves in dual permeability structures have been studied using the phase‐field model (Ghasemi et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

Co‐Current Fluid Flow Mechanisms Within a Complex Porous Structure at the Pore Level

Moradi

Zojaji

2022

Water Resources Research

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This study has been addressed the mechanisms of the co‐current fluid flow in a heterogeneous porous media using the lattice Boltzmann method. Since the smallest interaction between viscous and capillary forces at the interface is of great importance, the simulations are performed with the hybrid phase‐field model at the pore level. This is because the main advantage of this model is that due to its connection with the phase‐field theory, it has a solid physical basis to record interface dynamics. Model verification is followed by recording viscous coupling effects. The relative permeability curves and the velocity profiles are compared with the analytical solution, so that the observations confirm the accuracy claim of the model. In the following, the fluid flow through the heterogeneous porous structure is simulated, so that its sweep efficiency and corresponding velocity field at the breakthrough time are discussed. The results show that increasing the injection velocity reduces the displacement efficiency and increases the velocity field fluctuations due to the viscous fingering regime. Changing the wetting conditions to strong imbibition (SI) will increase the efficiency due to the role of capillary pressure and corner flow mechanism. Also, increasing the interfacial tension in the SI and the strong drainage will increase and decrease the sweep efficiency, respectively, so the rate of changes in fully immiscible flow is much higher than the near miscible flow. The velocity fluctuations in the fully immiscible flow are more significant than in the near miscible flow, which is reasonable given the flow properties.

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Introducing a novel method for determining the effective thermal conductivity at moderate and high Péclet numbers

Ghasemi,

Arocha,

Fayazi

et al. 2024

Can J Chem Eng

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Flow and heat transfer in porous materials is a common topic throughout many fields, including environmental and petroleum engineering. Using a coupled approach of experimental and simulation methods, this study presents a novel method for calculating thermal conductivity. Specifically, a new approach for the measurement of thermal dispersivity with both conduction and forced convection drives is proposed. In our experiments, temperature was monitored at different points within the porous medium, providing detailed spatial temperature distributions. These measurements allowed us to calculate and report effective thermal conductivity, enhancing the accuracy of our model. Experiments with various injection rates and temperatures were conducted on a sand pack. There is a relationship between the composition and connectivity of the solid in the geometry and heat transfer. However, in the case of forced convection, the key factor is the Péclet number which is important for optimal extraction of the heat inside the geothermal reservoir according to the cooling rate. When the Péclet number is high, the permeability of the porous medium plays a significant role. The velocity of the fluid can change the effective thermal conductivity up to four orders of magnitude. Due to the thermal resistance of solid and fluid, the temperature gradient between the boundary and the centre of the geometry was seen and temperature peaks were observed in the initial stages of the experiments. The size and number of peaks at the initial stage of the experiments are highly dependent on the matrix properties, such as thermal conductivity and surface area.

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Near miscible relative permeability curves in layered porous media- investigations via diffuse interface Lattice Boltzmann method

Cited by 12 publications

References 34 publications

Scalable Simulation of Pressure Gradient-Driven Transport of Rarefied Gases in Complex Permeable Media Using Lattice Boltzmann Method

Scalable Simulation of Pressure Gradient-Driven Transport of Rarefied Gases in Complex Permeable Media Using Lattice Boltzmann Method

Co‐Current Fluid Flow Mechanisms Within a Complex Porous Structure at the Pore Level

Introducing a novel method for determining the effective thermal conductivity at moderate and high Péclet numbers

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