Systematic Investigation of Corner Flow Impact in Forced Imbibition

Liu, Yang; Berg, Steffen; Ju, Yang; Cai, Jianchao; Kou, Jisheng; Cai, Jingong

doi:10.1029/2022wr032402

Cited by 15 publications

(6 citation statements)

References 69 publications

(103 reference statements)

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“…In total, 15 cycles are conducted for contact angle θ ∈ {45 • , 135 • } with an increment of 7.5 • , covering the wettability range of porous media from water-wet to CO 2 -wet. Extreme water-wet (θ < 45 • ) or CO 2 -wet (θ > 135 • ) porous media are not considered in this study, since the current algorithm does not capture the phenomenon of corner flow in extreme wetting conditions (Zhao et al 2016) (see Liu et al (2022) as a recent work on the effect of corner flow under complete wetting condition θ = 0 • ). The simulations are repeated on five different realisations of porous media with the same statistical parameters, i.e.…”

Section: Methodsmentioning

confidence: 99%

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Wettability impacts residual trapping of immiscible fluids during cyclic injection

et al. 2023

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Understanding the hysteretic behaviour in fluid–fluid displacement processes in porous media is critical in many engineering applications. In this work, we study the quasi-static immiscible displacement process in two-dimensional porous media during cyclic injections in the context of carbon geosequestration. The role of wettability on the residual trapping of CO $_2$ is investigated numerically using an extended interface tracking algorithm. Despite that higher CO $_2$ saturation can be achieved in CO $_2$ -wet porous media after the first CO $_2$ injection, the majority of CO $_2$ is found to be unstable and can be mobilised during subsequent water injection processes. An improvement in the residual trapping of CO $_2$ is observed as the number of injection cycles increases, which is associated with the dispersion of continuous CO $_2$ ganglia into numerous smaller blobs. Compared with either water-wet or CO $_2$ -wet porous media, it is found that less CO $_2$ is trapped within the neutral-wet ones at equilibrium state after a sufficient number of injection cycles. The hysteretic behaviour of saturation between water/CO $_2$ injection cycles is found to follow an exponential decay, which eventually reaches a finite value. This process corresponds to the shift of the mobile region during displacement from typical capillary fingering to a less ramified regime, which ultimately converges towards main flow channels. This work highlights the hysteretic behaviour during cyclic injections, providing insights on the wettability impacts on multiphase flow in porous media, which is of great importance in applications such as carbon geosequestration and geological hydrogen storage.

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Section: Methodsmentioning

confidence: 99%

“…2016) (see Liu et al. (2022) as a recent work on the effect of corner flow under complete wetting condition ). The simulations are repeated on five different realisations of porous media with the same statistical parameters, i.e.…”

Section: Methodsmentioning

confidence: 99%

Wettability impacts residual trapping of immiscible fluids during cyclic injection

et al. 2023

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“…In this regard, pore-scale simulation can be an effective tool to explore the influences of water phase on CO 2 huff-n-puff by taking into account the complex water distributions in porous media and various parameters from microscopic perspectives. Lattice Boltzmann method (LBM) is an effective pore-scale simulation method to simulate physical and chemical behaviors. − Wei et al performed the immiscible three-phase Shan–Chen LBM to investigate the effect of droplet shape and size, gravity, and meniscus curvature on the spontaneous motion of droplets and bubbles . Based on a color-gradient LBM, Zhu et al studied the effects of wettability, viscosity ratio, and capillary number on the relative permeability.…”

Section: Introductionmentioning

confidence: 99%

Pore-Scale Study on Shale Oil–CO₂–Water Miscibility, Competitive Adsorption, and Multiphase Flow Behaviors

Wang

Cai

et al. 2023

Langmuir

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Due to the fracturing fluid imbibition and primary water, oil−water two-phase fluids generally exist in shale nanoporous media. The effects of water phase on shale oil recovery and geological carbon sequestration via CO 2 huff-n-puff is non-negligible. Meanwhile, oil−CO 2 miscibility after CO 2 huff-n-puff also has an important effect on oil− water two-phase flow behaviors. In this work, by considering the oil− CO 2 competitive adsorption behaviors and the effects of oil−CO 2 miscibility on water wettability, an improved multicomponent and multiphase lattice Boltzmann method is proposed to study the effects of water phase on CO 2 huff-n-puff. Additionally, the effects of oil−CO 2 miscibility on oil−water flow behaviors and relative permeability are also discussed. The results show that due to Jamin's effect of water droplets in oil-wetting pores and the capillary resistance of bridge-like water phase in water-wetting pores, CO 2 can hardly diffuse into the oil phase, causing a large amount of remaining oil. As water saturation increases, Jamin's effect and the capillary resistance become more pronounced, and the CO 2 storage mass gradually decreases. Then, based on the results from molecular dynamics simulations, the influences of oil−CO 2 miscibility on oil−water relative permeability in calcite nanoporous media are studied, and as the oil mass percentage in the oil−CO 2 miscible system decreases, the oil/water relative permeability decreases/ increases. The improved lattice Boltzmann model can be readily extended to quantitatively calculate geological CO 2 storage mass considering water saturation and calculate the accurate oil−water relative permeability based on the real 3D digital core.

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Section: Introductionmentioning

confidence: 99%

“…Spontaneous imbibition (SI) is common in daily life and engineering applications, such as pen writing on paper, soil absorption of water, CO 2 geo-sequestration, and oil drainage from hydrocarbon source rocks. , In the field of petroleum engineering, SI is one of the important mechanisms for the development of tight reservoirs. − Due to the small porosity and low permeability, low-permeability reservoirs are extracted by conventional methods with rapid yield decline and a final recovery factor of about 5%. , It is to form a fracture network through volumetric fracturing and use SI between microfractures and matrix, thus achieving efficient development. SI is defined as the capillary displacement of a nonwetting phase by a wetting phase without the assistance of outside forces, and it is divided into cocurrent and counter-current SI. − The velocity direction of the wetting and nonwetting phases are the same in cocurrent SI, while they are opposite in counter-current SI …”

Section: Introductionmentioning

confidence: 99%

Further Study on the Effect of Interfacial Tension on Cocurrent Spontaneous Imbibition Based on Direct Simulation and NMR

Gong,

Li,

Wang

et al. 2023

Energy Fuels

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Due to the low permeability and small porosity, tight reservoirs are usually developed by volume fracturing of horizontal wells, and spontaneous imbibition is one of the important mechanisms. Capillary force is the dominant force for spontaneous imbibition in tight reservoirs. This paper presents a detailed study of spontaneous imbibition by a direct simulation method (Lattice Boltzmann method) and core experiments of nuclear magnetic resonance and proposes a method to characterize the degree of oil utilization on the core by using the variation of oil volume at the core cross section. It is found that the higher the interfacial tension, the higher the final recovery rate. The core is divided into four areas (the larger the area number, the farther away from the inlet) along the direction of spontaneous imbibition. At low interfacial tension, no significant snap-off is caused, but because of the lack of power, only the oil near the inlet can be effectively utilized and the other areas are hardly affected. However, at high interfacial tension, the spontaneous imbibition distance is long enough to utilize more oil, but because of the strong dynamics, the spontaneous imbibition front is unstable, which causes a more severe snap-off and generates more residual oil in each area. Based on the above observation, a compound interfacial tension method is proposed to reduce the snap-off and further improve the spontaneous imbibition recovery factor. The compound interfacial tension refers to the use of fluids with low and high interfacial tension in succession so that the advantages of both can be fully exploited. In this case, there is a significant reduction in the snap-off near the inlet, which also makes the spontaneous imbibition resistance reduced and the degree of utilization to the interior of the core increased.

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Systematic Investigation of Corner Flow Impact in Forced Imbibition

Cited by 15 publications

References 69 publications

Wettability impacts residual trapping of immiscible fluids during cyclic injection

Wettability impacts residual trapping of immiscible fluids during cyclic injection

Pore-Scale Study on Shale Oil–CO₂–Water Miscibility, Competitive Adsorption, and Multiphase Flow Behaviors

Further Study on the Effect of Interfacial Tension on Cocurrent Spontaneous Imbibition Based on Direct Simulation and NMR

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Systematic Investigation of Corner Flow Impact in Forced Imbibition

Cited by 15 publications

References 69 publications

Wettability impacts residual trapping of immiscible fluids during cyclic injection

Wettability impacts residual trapping of immiscible fluids during cyclic injection

Pore-Scale Study on Shale Oil–CO2–Water Miscibility, Competitive Adsorption, and Multiphase Flow Behaviors

Further Study on the Effect of Interfacial Tension on Cocurrent Spontaneous Imbibition Based on Direct Simulation and NMR

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Pore-Scale Study on Shale Oil–CO₂–Water Miscibility, Competitive Adsorption, and Multiphase Flow Behaviors