Mathematical model of liquid spontaneous imbibition into gas-saturated porous media with dynamic contact angle and gravity

Wang, Fuyong; Zhao, Jiuyu

doi:10.1016/j.ces.2020.116139

Cited by 22 publications

(9 citation statements)

References 30 publications

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“…The contact angle refers to the angle from the solid−liquid interface through the liquid to the gas−liquid interface at the junction of the solid, liquid, and gas phases. 43 The size of the contact angle reflects the surface hydrophobicity and the floatability of minerals. 44 The results of contact angle measurements are shown in Figure 12.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Recycling Lepidolite from Tantalum–Niobium Mine Tailings by a Combined Magnetic–Flotation Process Using a Novel Gemini Surfactant: From Tailings Dams to the “Bling” Raw Material of Lithium

Huang

Zhang

Cheng

et al. 2020

ACS Sustainable Chem. Eng.

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On January 25, 2019, the tailings dam at Vale's Coŕrego do Feijao mine (Brumadinho, Minas Gerais, Brazil) ruptured, releasing about 12 million cubic meters of tailings, killing over 240 people and posing a considerable and ongoing environmental hazard. Thus, the recovery of valuable minerals from tailings can contribute to a sustainable disposal of this hazardous residue, saving human lives and protecting the environment. The tailings of a tantalum−niobium mine usually contain a considerable amount of lepidolite resource. Nonetheless, the method of sustainably acquiring the lepidolite resource from tailings of a tantalum−niobium mine at lowtemperature environments has always been needed. In this study, we synthesize a new amine-based gemini surfactant, butanediyl-α,ω-bis-(dimethyldodecylammonium bromide) (BDB). It is introduced as a collector in the flotation of lepidolite from the tantalum−niobium mine tailings for the first time at low temperatures. We compare its capability to collect lepidolite with the monomeric surfactant 1-dodecylamine (DA). In bench-scale flotation experiments, the Li 2 O recovery of lepidolite concentrate with 80 g/t BDB was 10.96% and 31.85% higher than that with 160 g/t DA at 298 and 275 K, respectively, which indicated that BDB is a better collector for lepidolite than DA. BDB is a novel and superior collector for disposing of lepidolite tailings ponds.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Recycling Lepidolite from Tantalum–Niobium Mine Tailings by a Combined Magnetic–Flotation Process Using a Novel Gemini Surfactant: From Tailings Dams to the “Bling” Raw Material of Lithium

Huang

Zhang

Cheng

et al. 2020

ACS Sustainable Chem. Eng.

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“…Experimental studies have examined the dynamics of the contact angle with time in a capillary, and demonstrated that the contact angle changes with flow velocity. , Models have been developed to describe the dynamic contact angle (DCA) in a capillary. − Studies have modified the Washburn equation to consider the DCA for the process of capillary rise in tubes . Recently, several studies have coupled the DCA into SI models for porous media. − Additionally, the DCA has been considered for the SI model in fractal porous media . However, limited research has been reported to model the DI process by considering the effects of the DCA for tight reservoirs.…”

Section: Introductionmentioning

confidence: 99%

“…32−36 Additionally, the DCA has been considered for the SI model in fractal porous media. 35 However, limited research has been reported to model the DI process by considering the effects of the DCA for tight reservoirs.…”

Section: Introductionmentioning

confidence: 99%

Coupling the Dynamic Contact Angle into the Dynamic Imbibition Model for Fractal Porous Media

Wang

Lai

et al. 2023

Energy Fuels

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This study aims to develop a fractal model for the dynamic imbibition (DI) process in tight porous media. We developed the model by coupling the dynamic contact angle (DCA) into the DI model at capillary and core scales. A numerical method was proposed to solve the developed model. We then validated the model against experimental data reported in the literature. The results show a relatively satisfying fitting between our DI model and experimental data. We also compared the imbibition rate and oil recovery predicted by the DI model considering and not considering the DCA. The results indicate that considering the DCA improves the DI model's accuracy, whereas neglecting the DCA results in the overestimated imbibition rate and oil recovery for the DI process. We conducted sensitivity analysis to evaluate how the contact angle, interfacial tension, and displacement pressure affect our DI model's performance in calculating imbibition recovery. The results show a relatively more significant difference in imbibition recovery determined by DI models considering and not considering the DCA at a relatively high contact angle, a relatively high interfacial tension, and a relatively low displacing pressure. This study highlights the importance of considering the DCA in DI modeling for fracturing practices which associate with surfactant injections to alter wettability and reduce interfacial tension in tight reservoirs.

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“…Thus, fluid flow and chemical transport in porous media with low connectivity can be described using percolation theory, which contains lattice and bonds stochastically [29,30]. Furthermore, neutron and X-ray tomography experiments were used to study the fracture development of Callovo Oxfordian claystone and provided a feasible approach to visualizing the development of water-induced fractures during imbibition [31], but recent simulators still lack the visualization of imbibition process in three-dimensional (3D) scale [9,[32][33][34].…”

Section: Introductionmentioning

confidence: 99%

A New Model for Simulating the Imbibition of a Wetting-Phase Fluid in a Matrix-Fracture Dual Connectivity System

Ning

Ewing

et al. 2022

Geofluids

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The imbibition experiment is an effective approach for measuring petrophysical properties of porous media, with many such experiments performed over the past decade. Quite some empirical, analytical, and numerical models have been developed to simulate spontaneous imbibition of the wetting phase fluid into porous media, but limitations still exist. In previous studies, the imbibition process has been considered to give a piston-like displacement or the porous medium modeled as multiply-sized pores linked with bonds; both approaches fail to yield comprehensive results due to their neglect of the presence of irregular fractures or nonuniform flow paths through the matrix. By building a numerical model for simulating laboratory-scale experimental data, we performed imbibition tests on several fractured Barnett Shale samples having fractures either parallel ( P ) or transverse ( T ) to the bedding plane and used MATLAB to build a new numerical model by combining the imbibition process in fractures and the matrix using concepts from percolation theory. The experimental data show that the rocks with P -direction fractures have a more steady increase of imbibition rates than the case of T -direction one. As the shale matrix with low pore connectivity hampers the upward water movement, the imbibition rate of shales with T -direction fractures will decrease suddenly after the bottom layer in contact with water is saturated during the initial period. This wetting phase movement (WPM) model can simulate 3D porous media with 2D fractures. The rate of imbibition by fractured porous media is associated with physical parameters such as porosity and fracture distribution (e.g., the number and angle of fractures). Using Monte Carlo methods, we examined fracture parameters and predicted elapsed time and cumulative water imbibition, for the Barnett Shale samples. The results show that the rate of imbibed water mass is sensitive to the number of fractures directly connected to water source, and the connectivity between two neighboring grid cells is a key parameter for the wetting-front progression. The findings of this study can help to better understand the imbibition process with multiple influencing processes and factors in fractured-matrix rocks. Although the experiments, data simulation, and prediction results are based only on Barnett Shale samples, the model is readily applicable to imbibition tests of other fractured rocks to show the spatial and temporal behavior during a dynamic imbibition process that are not easily captured experimentally.

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Mathematical model of liquid spontaneous imbibition into gas-saturated porous media with dynamic contact angle and gravity

Cited by 22 publications

References 30 publications

Recycling Lepidolite from Tantalum–Niobium Mine Tailings by a Combined Magnetic–Flotation Process Using a Novel Gemini Surfactant: From Tailings Dams to the “Bling” Raw Material of Lithium

Recycling Lepidolite from Tantalum–Niobium Mine Tailings by a Combined Magnetic–Flotation Process Using a Novel Gemini Surfactant: From Tailings Dams to the “Bling” Raw Material of Lithium

Coupling the Dynamic Contact Angle into the Dynamic Imbibition Model for Fractal Porous Media

A New Model for Simulating the Imbibition of a Wetting-Phase Fluid in a Matrix-Fracture Dual Connectivity System

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