Local instabilities during capillary-dominated immiscible displacement in porous media

Liu, Yang; Iglauer, Stefan; Cai, Jianchao; Amooie, Mohammad Amin; Qin, Chaozhong

doi:10.26804/capi.2019.01.01

Cited by 27 publications

(15 citation statements)

References 37 publications

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“…(3) The chemical interactions between the fluids and solid matrix are neglected. (4) The wettability conditions are set as constantly distributed, which may not exactly match the real condition in nature [64]. (5) The gravity forces and influence of microfracture in the pore-throat system are not considered in the developed model.…”

Section: Discussionmentioning

confidence: 99%

Investigating the Influences of Pore-Scale Characteristics on Tight Oil Migration by a Two-Phase Pore Network Model

Zeng

Ma²,

Liu

et al. 2020

Geofluids

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The migration of expelled hydrocarbon from source rock into unconventional tight reservoirs is subject to different pore-scale fluid transport mechanisms as opposed to the conventional counterparts and therefore plays a crucial role in controlling the hydrocarbon distribution and accumulation in the former. One of the different mechanisms is related to the formation of a more viscous boundary layer (BL) of brine, i.e., wetting phase fluid on pore surfaces, giving rise to the so-called BL effect. In this work, a two-phase pore network model (PNM) that considers this BL effect is developed to study the influences of pore-scale characteristics on the oil migration process, manifested through the BL effect in tight-sandstone media. Good agreements are reached between experimentally derived relative permeability curves and predicted ones, by applying this model to the pore-network networks extracted from the same samples. Then, this validated model was used to evaluate the impacts of the following factors on the oil migration process: pore radius, coordination number, aspect ratio, brine viscosity, and wettability. The results show that all factors can influence the oil migration process but at different magnitudes. The applicability and significance of the developed tight oil migration PNM are discussed in this work.

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Section: Discussionmentioning

confidence: 99%

Investigating the Influences of Pore-Scale Characteristics on Tight Oil Migration by a Two-Phase Pore Network Model

Zeng

Ma²,

Liu

et al. 2020

Geofluids

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“…The smoothed particle hydrodynamics (SPHs) method, a mesh-free method, is fully particle discretized [ 20 ], which is good at dealing with the free surface and large deformation problems [ 6 , 21 ]. If the gas phase is taken into consideration based on the free surface problem, it turns into a two-phase problem [ 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Study of the Imbibition Phenomenon in Porous Media by the Smoothed Particle Hydrodynamic (SPH) Method

Liu

Tao

Sun

2022

Entropy

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Over recent decades, studies in porous media have focused on many fields, typically in the development of oil and gas reservoirs. The imbibition phenomenon, a common mechanism affecting multi-phase flows in porous media, has shown more significant impacts on unconventional reservoir development, where the effect of the pore space increases with decreased pore sizes. In this paper, a comprehensive SPH method is applied, considering the binary interactions among the particles to study the imbibition phenomenon in porous media. The model is validated with physically meaningful results showing the effects of surface tension, contact angle, and pore structures. A heterogeneous porous medium is also constructed to study the effect of heterogeneity on the imbibition phenomenon; it can be referred from the results that the smaller pore throats and wetting surfaces are more preferred for the imbibition. The results show that the SPH method can be applied to solve the imbibition problems, but the unstable problem is still a sore point for the SPH method.

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“…In addition to the theoretical analysis, the fluid flow behaviors can also be studied using other methods including MDS, pore network modeling (PNM), experiments, the lattice Boltzmann method (LBM), and other simulation methods. − Of these methods, the LBM is especially appealing because of its advantages such as the ease in handling complex structures, the ease of parallel implementation, and algorithm simplicity. , Besides, the LBM is especially effective for the simulation of the multicomponent and multiphase (MCMP) flow, and the models include color-gradient model, Shan–Chen model, , free energy model, and the mean-field method . Due to the simplicity and versatility, the Shan-Chen model is one of the most widely used MCMP LBMs .…”

Section: Introductionmentioning

confidence: 99%

Investigations on Water Imbibing into Oil-Saturated Nanoporous Media: Coupling Molecular Interactions, the Dynamic Contact Angle, and the Entrance Effect

Wang

2021

Ind. Eng. Chem. Res.

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Spontaneous imbibition of hydraulic fracturing fluids into the water-wet inorganic media is a ubiquitous phenomenon, which has an important influence on tight/shale oil recovery and groundwater contamination. However, in nanoscale space, the fluid–solid (water–wall and oil-wall) molecular interactions, which can result in the nanoscale effects of the slip boundary and the varying interfacial fluid viscosity, will make the fluid flow behaviors be more complex and difficult to characterize. In this work, a new generalized imbibition model in inorganic nanopores and porous media is established by the theoretical analysis and a nanoscale Shan–Chen lattice Boltzmann method (LBM). The effects of pore dimensions and shapes in porous media, the nanoscale effects, the dynamic contact angle, and the entrance effect are considered and discussed. The results show that the proposed model can accurately characterize the oil/water imbibition mechanisms and be adapted to different nanoscale effects. Based on discussions, this study can provide microscopic basics of water imbibing into nanopores and provide guiding information and theoretical model for the oil recovery from tight/shale reservoirs by hydraulic fracturing, the groundwater remediation by restricting imbibition rate, and other relevant applications.

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Local instabilities during capillary-dominated immiscible displacement in porous media

Cited by 27 publications

References 37 publications

Investigating the Influences of Pore-Scale Characteristics on Tight Oil Migration by a Two-Phase Pore Network Model

Investigating the Influences of Pore-Scale Characteristics on Tight Oil Migration by a Two-Phase Pore Network Model

Study of the Imbibition Phenomenon in Porous Media by the Smoothed Particle Hydrodynamic (SPH) Method

Investigations on Water Imbibing into Oil-Saturated Nanoporous Media: Coupling Molecular Interactions, the Dynamic Contact Angle, and the Entrance Effect

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