Effect of permeants on fracture permeability in granite under hydrothermal conditions

Hafidz, Achmad; Kinoshita, Naoki; Yasuhara, Hajime

doi:10.1016/j.rockmb.2022.100007

Cited by 7 publications

(6 citation statements)

References 32 publications

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“…Figure shows the contact angle of the brine phase on the rock surface, and the final imbibition mass of brine/dodecane in the rock increases with the increase of the treatment pressure on the rock (CO 2 -brine immersion stage). The water wetness of shale weakens because, at higher pressure, CO 2 is more soluble in water; more CO 2 dissolved in water will reduce the PH value of the solution, and the increase in acidity will dissolve minerals such as carbonate and weaken the water wetness of rock samples . The contact angle of the brine phase on a rock surface focuses on the wettability (face) of a specific surface.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The water wetness of shale weakens because, at higher pressure, CO 2 is more soluble in water; more CO 2 dissolved in water will reduce the PH value of the solution, and the increase in acidity will dissolve minerals such as carbonate and weaken the water wetness of rock samples. 45 The contact angle of the brine phase on a rock surface focuses on the wettability (face) of a specific surface. It is influenced by factors such as mineral composition and intermolecular forces.…”

Section: Contact Angle Of Brinementioning

confidence: 99%

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Experimental Investigation on the Spontaneous Imbibition Characteristics of Shale under the Combined Action of CO₂ and Water

Tang,

Wu,

Cheng

et al. 2024

Energy Fuels

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Spontaneous imbibition can impact the fluid distribution and saturation within the shale reservoirs, which, in turn, has an impact on the production and storage of shale oil and gas. The spontaneous imbibition characteristics of shale reservoirs under the CO 2 -brine-rock system will change. In order to understand the spontaneous imbibition characteristics of shale (before and after treatment with different pressures in CO 2 -brine), we researched the rock samples of shale from Chang 7 3 submember of Ordos Basin accordingly to conduct CO 2 -brine immersion treatment under different pressure tests, spontaneous imbibition tests (AFO), NMR T 2 tests, contact angle tests, and XRD tests. The results show that the final imbibition mass of/the initial imbibition rate of/the imbibition volume of brine and dodecane for the shale increase with the treatment pressure (CO 2 -brine immersion stage) increasing on the shale. It is the result of the combination of porosity, wettability, and mineral composition. Although the water wettability of the shale decreases and the relative content of water-wet (oil-wet) minerals decreases (increases), the porosity of the shale increases, so that the final imbibition mass of both brine and dodecane increases. Therefore, porosity has a greater influence on SI. CO 2 -water treatment at different pressures improves the spontaneous imbibition capacity of shale into water and oil, which will be beneficial to the flowback of fracturing fluid and the recovery of crude oil in the process of shale oil production.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Contact Angle Of Brinementioning

confidence: 99%

Experimental Investigation on the Spontaneous Imbibition Characteristics of Shale under the Combined Action of CO₂ and Water

Tang,

Wu,

Cheng

et al. 2024

Energy Fuels

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“…[38][39][40] Roughness has a significant impact on fracture aperture, which in turn affects fracture permeability. 41,42 Extensive researches have been carried out to analyze the heterogeneity of aperture on fracture surface, aiming to enhance understanding of the impact of surface roughness on flow. [41][42][43][44] However, the majority of these studies have focused on 3D single-fractured media or 2D complex system, and some have neglected the flux interaction between 3D fractures-matrix.…”

Section: Introductionmentioning

confidence: 99%

“…41,42 Extensive researches have been carried out to analyze the heterogeneity of aperture on fracture surface, aiming to enhance understanding of the impact of surface roughness on flow. [41][42][43][44] However, the majority of these studies have focused on 3D single-fractured media or 2D complex system, and some have neglected the flux interaction between 3D fractures-matrix. 41,44 Consequently, exploring the role of complex structures and varying aperture in flow and transport can provide valuable insights into hydraulic property of fractured media.…”

Section: Introductionmentioning

confidence: 99%

“…The joint roughness coefficient (JRC) is a widely used measure of the roughness of fracture walls 38‐40 . Roughness has a significant impact on fracture aperture, which in turn affects fracture permeability 41,42 . Extensive researches have been carried out to analyze the heterogeneity of aperture on fracture surface, aiming to enhance understanding of the impact of surface roughness on flow 41‐44 .…”

Section: Introductionmentioning

confidence: 99%

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Fluid flow and mass transport in fractured media with curved fractures and varying apertures: A 3D modeling approach

Wang

Yin

2023

Numerical Meth Engineering

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Fractured media have been extensively studied due to their significant impact on hydraulic properties of subsurface systems. However, accurately modeling and simulating flow and transport in complex 3D fractured media still remains a challenge. For this purpose, this work aims to develop a new 3D modeling approach and investigate flow and mass transport in fractured media. First, a modeling approach is presented for generating 3D complex structures and high quality finite element grids. This approach allows for the presence of a range of complex geometries, including curved fracture, multiple fractures and the coexistence of fracture‐inclusions. The resulting models and grids are of high quality, enabling accurate simulation and analysis of complex systems. Furthermore, stress‐dependent aperture and roughness are integrated in the computational scheme using Barton–Bandis law. The Galerkin finite element method is used for numerical discretization, then pressure and concentration are calculated in a unified formulation. Later, numerical tests are performed to analyze the role of 3D fractures in flow and mass transport. Simulation results show that fractures have a larger impact on pressure distribution and flow rate compared to inclusions. Fracture roughness increases the aperture then the effective conductivity is improved as well. Curved fractures may reduce flow rate more than planar fractures due to the tortuosity effect. The variation of equivalent permeability tensor is analyzed with varying orientation, roughness, and number of fractures. The impact of stress and fracture roughness causes a variation of fracture permeability and a high pressure gradient on the fracture‐matrix interface, resulting in different patterns of concentration evolution. Overall, this investigation provides insights into the role of 3D fractures in subsurface flow and transport, with implications for various applications.

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Shear-induced permeability evolution of natural fractures in granite: Implications for stimulation of EGS reservoirs

Li,

Zhang,

Xiu

et al. 2024

Engineering Geology

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Effect of permeants on fracture permeability in granite under hydrothermal conditions

Cited by 7 publications

References 32 publications

Experimental Investigation on the Spontaneous Imbibition Characteristics of Shale under the Combined Action of CO₂ and Water

Experimental Investigation on the Spontaneous Imbibition Characteristics of Shale under the Combined Action of CO₂ and Water

Fluid flow and mass transport in fractured media with curved fractures and varying apertures: A 3D modeling approach

Shear-induced permeability evolution of natural fractures in granite: Implications for stimulation of EGS reservoirs

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Effect of permeants on fracture permeability in granite under hydrothermal conditions

Cited by 7 publications

References 32 publications

Experimental Investigation on the Spontaneous Imbibition Characteristics of Shale under the Combined Action of CO2 and Water

Experimental Investigation on the Spontaneous Imbibition Characteristics of Shale under the Combined Action of CO2 and Water

Fluid flow and mass transport in fractured media with curved fractures and varying apertures: A 3D modeling approach

Shear-induced permeability evolution of natural fractures in granite: Implications for stimulation of EGS reservoirs

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Experimental Investigation on the Spontaneous Imbibition Characteristics of Shale under the Combined Action of CO₂ and Water

Experimental Investigation on the Spontaneous Imbibition Characteristics of Shale under the Combined Action of CO₂ and Water