☆ 4.7 Review

Recent Advances in Multiscale Digital Rock Reconstruction, Flow Simulation, and Experiments during Shale Gas Production

ENERGY & FUELS (2023)

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Article Energy & Fuels

Heterogeneous Effect of Organic Matter on Accumulation Behaviors of Shale Gas in Water

Jun Zhang et al.

Summary: The study focuses on the interaction between gas and solid interface in a water environment, finding that the atomic arrangement of the interface influences the gas accumulation state, with an increase in interfacial bond length leading to reduced gas accumulation ability. Gas and water accumulation on the interface shows a mutually competitive relationship.

ENERGY & FUELS (2022)

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Article Energy & Fuels

Modified LB model for simulation of gas flow in shale pore systems by introducing end effects and local effective mean free path

Xinchi Jia et al.

Summary: This study proposes a modified microscale lattice Boltzmann (MM-LB) model to simulate gas flow in complex media such as shale. It finds that the end effect on gas flow through pore throat is caused by both the streaming bending and the variance of viscosity. The study also reveals that the apparent permeability of gas flow in shale decreases with decreasing temperature or increasing pressure, and the pressure has a greater effect than temperature. Additionally, the study suggests that permeability prediction based on tube/slit pore models underestimates the apparent permeability in shale due to ignoring connectivity and the end effect.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2022)

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Article Energy & Fuels

Multi-scale pore structure, pore network and pore connectivity of tight shale oil reservoir from Triassic Yanchang Formation, Ordos Basin

He Zheng et al.

Summary: The accurate evaluation of microscopic pore structure characteristics of shales is crucial for shale oil development. In this study, various methods were used to investigate the pore structure of silty shale samples from the Upper Triassic Yanchang formation in Ordos Basin. The results revealed the development of five typical pores and the range of pore sizes in the samples. The combination of different methods provided reasonably consistent results, aiding in the understanding of storage space and transport property of lacustrine shale oil.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2022)

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Article Energy & Fuels

Pore network modeling of oil and water transport in nanoporous shale with mixed wettability

Wei Zhang et al.

Summary: Hydraulic fracturing is an effective method for developing shale oil reservoirs, but the fluid flow behaviors in shale are still unclear due to the nanoscale pores and heterogeneities in mineral types and wettability. In this study, the pore network modeling method was used to investigate the single-phase and oil-water two-phase flow behaviors, considering the nanoconfinement effects, wettability, and pore space characteristics in shale. Results showed that the total organic content and wettability are the primary factors affecting single-phase flow, and slip effect enhances the flow capacities of water and oil. The wettability effect on two-phase flow was not as notable as that on single-phase flow, and oil-water two-phase relative permeability curves are significantly affected by the total organic content.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2022)

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Article Energy & Fuels

Nanoconfined methane flow behavior through realistic organic shale matrix under displacement pressure: a molecular simulation investigation

Zheng Sun et al.

Summary: Academic investigations on methane flow mechanisms at the nanoscale related to shale gas reservoir development have attracted great interest. This work establishes a fundamental framework using molecular dynamics to mimic nanoconfined fluid flow through realistic organic shale matrix. Simulation results show that displacement pressure plays a dominant role in affecting methane flow velocity and velocity distribution, but not methane density distribution.

JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY (2022)

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Article Water Resources

An efficient adaptive implicit scheme with equivalent continuum approach for two-phase flow in fractured vuggy porous media

Luyu Wang et al.

Summary: This study investigates the numerical method and equivalent continuum approach for fluid flow in fractured porous media. By developing an efficient implicit scheme and utilizing an improved equivalent continuum approach, the proposed numerical scheme improves convergence condition and computational efficiency, and successfully simulates fluid flow in fracture networks with complex geometry.

ADVANCES IN WATER RESOURCES (2022)

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Article Engineering, Environmental

Flow behaviors of shale oil in kerogen slit by molecular dynamics simulation

Jie Liu et al.

Summary: This study investigates the flow behavior of multicomponent shale oil in realistic kerogen channels using molecular dynamic simulation. The results show that the flow of shale oil exhibits peristaltic behavior due to the influence of kerogen branched chains. The heavy component forms adsorbed layers, while asphaltene molecules cluster in bulk phase. Increasing driving force and temperature enhance shale oil flow.

CHEMICAL ENGINEERING JOURNAL (2022)

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Article Thermodynamics

Impacts of gas properties and transport mechanisms on the permeability of shale at pore and core scale

Zhenhua Tian et al.

Summary: In this study, integrated permeability models for micro-nanopores and fractal shale matrixes are developed to analyze gas transport mechanisms and their influencing factors. The proposed models are verified using mathematical models, molecular dynamics simulation, and experimental data. The findings highlight the importance of gas properties, pressure, and pore size in gas transport.

ENERGY (2022)

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Article Energy & Fuels

A lattice Boltzmann simulation on the gas flow in fractal organic matter of shale gas reservoirs

Bowen Hu et al.

Summary: This study presents a modified lattice Boltzmann model with effective relaxation time to simulate shale gas micro-flow behaviors in fractal organic matter and predict permeability. Numerical simulations show that permeability is influenced by fractal dimension, lacunarity, and average pore diameter, and anisotropic structures have significant impacts on directional permeability of shale organic matter.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2022)

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Article Mechanics

A method for pore-scale simulation of single-phase shale oil flow based on three-dimensional digital cores with hybrid mineral phases

Lian Duan et al.

Summary: A new method for pore-scale simulation of single-phase shale oil flow based on digital cores with hybrid mineral phases is proposed in this paper. This method can identify each mineral pore wall and consider the adsorption layer and slippage boundary condition. By applying this method, the effects of total organic carbon, slippage, and adsorption on single-phase shale oil flow are analyzed.

PHYSICS OF FLUIDS (2022)

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Article Engineering, Chemical

The Impacts of Pore Structure and Relative Humidity on Gas Transport in Shale: A Numerical Study by the Image-Based Multi-scale Pore Network Model

Wenhui Song et al.

Summary: In this study, an image-based shale multi-scale pore network model is proposed to analyze the impacts of pore structure and relative humidity on gas transport. The results show that gas permeability decreases with increasing relative humidity, dropping to zero when the average pore radius is less than 12 nm and relative humidity is larger than 0.7.

TRANSPORT IN POROUS MEDIA (2022)

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Article Energy & Fuels

Multi-scale reconstruction of porous media from low-resolution core images using conditional generative adversarial networks

Yongfei Yang et al.

Summary: This study proposes an efficient and reliable approach based on conditional generative adversarial network (cGAN) for multi-scale digital rock reconstruction using low-resolution core images. The model is trained using high-resolution core images and their corresponding large structure images, and the generated images exhibit great agreement with real pore structures. The proposed method can generate images independent of the structure size to some extent.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2022)

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Article Energy & Fuels

Hybrid-dimensional modeling for fluid flow in heterogeneous porous media using dual fracture-pore model with flux interaction of fracture-cavity network

Luyu Wang et al.

Summary: Developing numerical methods for fractured porous media is crucial in geoscience applications, as prior studies have shown that discrete fractures, cavities, and heterogeneity significantly impact the hydraulic properties of such media. This research presents a numerical investigation on fluid flow in heterogeneous porous media, taking into account the flux connection of fracture-cavity networks. A hybrid-dimensional modeling approach, combined with a dual fracture-pore model, is utilized, and the numerical scheme is derived from the Galerkin finite element method. The study focuses on the numerical treatment of flux interaction between multiple fractures. The model is verified through benchmark studies and grid convergence tests to demonstrate grid independence. Subsequently, a simulation is conducted on a fractured porous medium with different states of cavities, and the effects of impermeable and conductive fractures on fluid flow are studied. The study also compares the impacts of heterogeneity, boundary conditions, and conductivity of the fracture-cavity network on fluid flow. Furthermore, the pressure deviation induced by heterogeneity is analyzed based on different conductivities of fractures and cavities, revealing that pressure distribution is highly influenced by fracture conductivity and cavity state, and that the influence of heterogeneity on high-conductivity fractures is relatively smaller than that on low-conductivity fractures.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2022)

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Article Energy & Fuels

Assessment of multi-scale pore structures and pore connectivity domains of marine shales by fractal dimensions and correlation lengths

Yuchen Fan et al.

Summary: Digital rock technology provides realistic pore structure information for shale reservoir evaluation, but the characterization of multi-scale pore size distribution and pore connectivity has been challenging. This study introduces a novel method called FracD to obtain continuous multi-scale PSD curves of shales by extracting fractal pore structure information from pore network models at micro- and nano-scales. The method successfully computes PSD curves for two shale samples from the Sichuan Basin and introduces a percolation correlation length parameter for pore connectivity assessment.

FUEL (2022)

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Article Energy & Fuels

Knudsen diffusion in pore-scale water-bearing shales: modelling and case study

Fei Mo et al.

Summary: This study proposed a model to calculate the diffusivity of gases in water-bearing shales. The results showed that the presence of water significantly reduced the gas diffusion in shales. In addition, factors such as temperature, pore radius, porosity, and pore wall roughness were found to affect the diffusion coefficient.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2022)

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Editorial Material Energy & Fuels

Understanding gas transport mechanisms in shale gas reservoir: Pore network modelling approach

Wenhui Song et al.

Summary: This report summarizes recent findings on gas transport mechanisms in shale gas reservoirs using pore network modeling. The study developed a multi-scale pore network model to accurately characterize the shale pore structure, and established single-component and multi-component hydrocarbon pore network transport models. The analysis considered gas slippage, real gas properties, capillary pressure, fluid occurrence, and the influences of hydrocarbon composition and pore structure on condensate gas transport. The results provide valuable insights into gas transport mechanisms in shale gas reservoirs.

ADVANCES IN GEO-ENERGY RESEARCH (2022)

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Article Thermodynamics

Effects of gas components, reservoir property and pore structure of shale gas reservoir on the competitive adsorption behavior of CO2 and CH4

Weidong Xie et al.

Summary: This study simulated the competitive adsorption behavior of CO2 and CH4 at in-situ conditions in shale gas reservoirs and analyzed the effects of binary gas components, shale properties, and pore structure on the CO2 adsorption affinity. Mathematical and geological models for CO2 injection into the Longmaxi shale gas reservoir to enhance CH4 recovery and achieve carbon sequestration were established based on experimental and reservoir parameters, and the feasibility and expected benefits were discussed.

ENERGY (2022)

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Article Chemistry, Physical

Molecular insights into supercritical methane sorption and self-diffusion in monospecific and composite nanopores of deep shale

Fangtao Lyu et al.

Summary: This study investigated methane sorption and self-diffusion behavior in different conditions using representative shale components. The results showed differences in adsorption performance in different nanopores, with smaller pores having stronger adsorption capacity. The study sheds light on the occurrence and transport characteristics of supercritical fluids on composite nanomaterials.

JOURNAL OF MOLECULAR LIQUIDS (2022)

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Article Energy & Fuels

U-Net model for multi-component digital rock modeling of shales based on CT and QEMSCAN images

Bingke Li et al.

Summary: This paper presents a method to accurately and quickly establish digital core images with multi-mineral components. By training a U-Net model, the CT images are automatically segmented and converted into multi-mineral component images, and manually segmented micropores and fractures are added. The results are satisfactory.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2022)

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Article Energy & Fuels

A quantitative analysis of flow properties and heterogeneity in shale rocks using computed tomography imaging and finite-element based simulation

James O. Adeleye et al.

Summary: This study presents a quantitative evaluation of flow property influenced by micro-scale heterogeneities in shale rocks. Micro- and nano-Computed Tomography images of shale rock samples from different formations were digitized and computational simulations were carried out to compute parameters such as pore-volume distribution, porosity, permeability, and heterogeneity factor. The results revealed the impact of micro-cracks on permeability and porosity, as well as the morphological differences among shale rock samples. Additionally, the analysis showed an inverse relationship between tortuosity and porosity, permeability, and their degree of heterogeneity.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2022)

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Article Engineering, Environmental

CO2-oil diffusion, adsorption and miscible flow in nanoporous media from pore-scale perspectives

Han Wang et al.

Summary: This study utilized a novel multiple relaxation time lattice Boltz-mann method to simulate CO2-oil diffusion, adsorption, and miscible flow in nanoporous media, successfully validated by Fick's second law and MD simulations. The results indicated that CO2 diffused more readily into the oil phase from regions attractive to CO2 in porous media with heterogeneous adsorption capacity. Additionally, the study identified a critical nC8 mass percentage value below which CO2 enhanced nC8 flow while having a negligible impact beyond that value.

CHEMICAL ENGINEERING JOURNAL (2022)

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Article Energy & Fuels

Shale Digital Core Image Generation Based on Generative Adversarial Networks

Wenshu Zha et al.

Summary: This paper introduces a novel method for reconstructing digital shale core samples based on GANs, which successfully generates realistic digital core samples. Evaluation metrics like FID and KID demonstrate that the real and reconstructed samples are highly similar, indicating the effectiveness of the new reconstruction method.

JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME (2021)

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Article Engineering, Geological

Geomechanical characterisation of organic-rich calcareous shale using AFM and nanoindentation

S. P. Graham et al.

Summary: This paper provides a comprehensive study of shale samples using nano- and micro-mechanical data, aiming to better understand the macroscopic mechanical properties resulting from the microstructural constituents of shale.

ROCK MECHANICS AND ROCK ENGINEERING (2021)

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Article Energy & Fuels

A 3D FIB-SEM technique for quantitative characterization of oil shale's microstructure: A case study from the Shahejie Formation in Dongying Depression, China

Jianpeng Zhao et al.

Summary: Investigating the pore structure of shale rocks using FIB and SEM techniques revealed the presence of both organic and inorganic pores, with analysis on pore connectivity and size distributions showing mesoscale pores were abundant but with limited contribution to total pore volume, while macropores played a larger role. The findings of isolated pores being predominant in the analyzed samples are crucial for accurate petrophysical simulations and understanding the intrinsic properties of oil shales.

ENERGY SCIENCE & ENGINEERING (2021)

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Article

Investigation on petrophysical properties of fractured tight gas sandstones: a case study of Jurassic Xujiahe Formation in Sichuan Basin, Southwest China

Huawei Zhao et al.

Arabian Journal of Geosciences (2021)

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Article Materials Science, Multidisciplinary

Slice-to-voxel stochastic reconstructions on porous media with hybrid deep generative model

Fan Zhang et al.

Summary: The study introduces a hybrid deep generative model for 3D porous media reconstruction, which combines VAE and GAN to improve training stability and generative capability. The use of a simple but useful loss function helps enhance accuracy.

COMPUTATIONAL MATERIALS SCIENCE (2021)

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Article Engineering, Multidisciplinary

Statistical characterization and reconstruction of heterogeneous microstructures using deep neural network

Jinlong Fu et al.

Summary: A novel method is proposed to statistically characterize and reconstruct random microstructures through a deep neural network model, for studying the relationships between microstructure and properties. By collecting local patterns to train the model and generating statistically equivalent samples, good agreements are observed in multiple tests.

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING (2021)

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Review Energy & Fuels

Transport of Shale Gas in Microporous/Nanoporous Media: Molecular to Pore-Scale Simulations

Hao Yu et al.

Summary: This comprehensive review discusses the current advances of multiscale transport simulations of shale gas in microporous/nanoporous media, covering molecular dynamics simulations and lattice Boltzmann method approaches, emphasizing the effects of various factors on gas transport characteristics in nanopores.

ENERGY & FUELS (2021)

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Article Engineering, Environmental

Molecular insights into carbon dioxide enhanced multi-component shale gas recovery and its sequestration in realistic kerogen

Sen Wang et al.

Summary: This study investigates the competitive adsorption between CO2 and hydrocarbon components in shales, as well as the recovery mechanisms of CO2 huff-n-puff in kerogenic circular nanopores. The study reveals that different pore geometries and compositions significantly impact gas adsorption and recovery behaviors, highlighting the importance of using realistic shale kerogen models. Additionally, increasing pore size improves gas recovery during pressure drawdown but limits the effectiveness of CO2 injection, leading to an overall increase in gas recovery and CO2 sequestration efficiency.

CHEMICAL ENGINEERING JOURNAL (2021)

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Article Energy & Fuels

Molecular characterization of carbon dioxide, methane, and water adsorption in micropore space of kerogen matrix

Leebyn Chong et al.

Summary: The interaction of carbon dioxide and methane with organic matter represented by kerogen heavily impacts carbon storage and enhanced gas recovery in shales. In this study, molecular dynamics and Monte Carlo simulations were used to investigate the adsorption of carbon dioxide, methane, and water in immature type II-A kerogen. Water shows the highest uptake due to strong energy interaction with kerogen, while methane and carbon dioxide display similar adsorption in micropore space.

FUEL (2021)

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Review Energy & Fuels

X-ray tomography imaging of shale microstructures: A review in the context of multiscale correlative imaging

Muhammad Arif et al.

Summary: The microstructure of shale plays a crucial role in determining hydrocarbon reserves and productivity, yet remains poorly understood due to complex pore space configurations and heterogeneity at multiple length scales. Recent advancements in imaging techniques have allowed for the observation of shale microstructure, specifically using mu CT methods, but limitations persist in capturing nanosized pores and organic matter. A multiscale correlative imaging framework, combining techniques such as mu CT, SEM, and FIB-SEM, is necessary for a comprehensive characterization of shale microstructure and offers a powerful tool for quantification.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2021)

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Article Materials Science, Multidisciplinary

Microstructure Generation via Generative Adversarial Network for Heterogeneous, Topologically Complex 3D Materials

Tim Hsu et al.

Summary: By utilizing a generative adversarial network (GAN) framework to learn and generate 3D microstructures of solid oxide fuel cell electrodes, the results show that the generated microstructures closely match the original ones and exhibit similar performance in electrochemical simulations.

JOM (2021)

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Review Thermodynamics

Characterizing pore-level oil mobilization processes in unconventional reservoirs assisted by state-of-the-art nuclear magnetic resonance technique

Xiang Zhang et al.

Summary: This article highlights the importance of NMR in the development of unconventional resources, provides an analysis of different NMR methods for characterizing pore-scale oil mobilization, and outlines the controversies and challenges in the research.

ENERGY (2021)

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Article Chemistry, Multidisciplinary

Anisotropic Permeability Influencing the Performance of Free CH4 and Free CO2 during the Process of CO2 Sequestration and Enhanced Gas Recovery (CS-EGR) from Shale

Peng Zhao et al.

Summary: The study demonstrates the significant impact of anisotropic permeability on the behavior of free gases in shale reservoirs, with higher k values leading to increased accumulation of CO2 and enhanced CH4 recovery. Additionally, variations in k significantly influence the distribution of free gases, with gases tending to migrate along directions with higher permeability.

ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2021)

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Review Geosciences, Multidisciplinary

A review on modern imaging techniques for characterization of nanoporous unconventional reservoirs: Challenges and prospects

Achinta Bera et al.

Summary: Characterization and modeling of unconventional reservoirs present challenges due to the complexity of fluid flow through nanoporous media. Modern imaging techniques play a key role in understanding the difficulty of characterization methodologies in studying complex nanopore systems. Additionally, economic analysis of imaging techniques for unconventional reservoir characterization and their application in field development projects are discussed.

MARINE AND PETROLEUM GEOLOGY (2021)

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Article Energy & Fuels

Low-Field NMR Investigation of the Dynamic Adsorption- Desorption Process of Shale Gas

Guangzhao Zhou et al.

Summary: This study explores the distribution of multiphase methane in shale using NMR and adsorption experiments, focusing on factors such as rock components, clay mineral types, and fluid states. Analysis of the T-2 signal spectrum reveals the distribution of adsorbed and free methane in shale, and a mathematical model is proposed to simulate the characteristics of methane in the adsorption-desorption process.

ENERGY & FUELS (2021)

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Article Energy & Fuels

Hierarchical Modeling of Hydromechanical Coupling in Fractured Shale Gas Reservoirs with Multiple Porosity Scales

Xia Yan et al.

Summary: This article presents a new hierarchical approach for simulating hydromechanical coupling in fractured shale gas reservoirs with multiple porosity scales. The method uses equivalent mesoscopic models and two-level homogenization to represent materials and fractures implicitly through an equivalent continuum model, while explicitly considering hydraulic fractures. Test and application of this hierarchical approach show its effectiveness in studying various factors affecting gas production.

ENERGY & FUELS (2021)

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Article Energy & Fuels

Identification of organic species with double-sided tape characteristics on the surface of carbonate reservoir rock

Nathalia Tessarolo et al.

Summary: The study reveals the importance of nitrogen-containing species with sticky properties in enhancing oil recovery from carbonate reservoir rocks, contrary to previous assumptions. Understanding the molecular composition of organic material on rock surfaces is crucial for designing effective enhanced oil recovery methods. Adsorption of positively charged organic molecules onto mineral surfaces supports the dominance of basic N-containing molecules in controlling the wetting state of carbonate reservoir rock.

FUEL (2021)

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Article Energy & Fuels

Apparent permeability model for gas transport through micropores and microfractures in shale reservoirs

Qi Gao et al.

Summary: The research model developed in this paper can better analyze the transport of real gas through micropores and microfractures in shale formation. The results show that microfracture aperture decreases more than micropore diameter during reservoir depletion, and gas apparent permeability will continue to increase for smaller size microstructures while it first decreases and then rebounds for larger size microstructures as pore pressure decreases.

FUEL (2021)

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Article Engineering, Petroleum

Pore-Scale Perspective of Gas/Water Two-Phase Flow in Shale

Tao Zhang et al.

Summary: Transport behaviors of single-phase gas and single-phase water at the nanoscale deviate from the predictions of continuum flow theory, especially when both gases and liquids flow simultaneously in pores or networks of pores. A pseudopotential-based lattice Boltzmann method was developed to simulate gas/water two-phase flow at the pore scale, incorporating fluid/fluid and fluid/solid interactions to capture microscopic interactions among phases. The study demonstrated the successful application of the proposed method in modeling gas/water two-phase flow in systems like single nanopores, parallel nanopores, and nanoporous media.

SPE JOURNAL (2021)

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Review Energy & Fuels

A review of experimental nanofluidic studies on shale fluid phase and transport behaviors

Bo Bao et al.

Summary: Nanofluidics has become an important tool for studying shale fluid behavior, allowing for the revelation of physical properties of shale fluids and simulation of shale rock conditions through experiments in nanochannels and nanomodels. While there are current limitations in nanofluidic tools, promising future developments are expected to provide multidimensional data on shale fluids.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2021)

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Article Energy & Fuels

Stress-dependent fluid dynamics of shale gas reservoirs: A pore network modeling approach

Jalal Foroozesh et al.

Summary: This study utilizes pore network modeling to investigate the flow behavior of methane gas in shale reservoirs under different effective stress conditions, considering slip flow and gas desorption effects. The results show that stress has a negative impact on gas flow, especially when slip flow and desorption mechanisms are operating in the models.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2021)

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Article Engineering, Environmental

Dynamic fluid states in organic-inorganic nanocomposite: Implications for shale gas recovery and CO2 sequestration

Liang Huang et al.

Summary: This study conducted microscopic modeling for shale nanocomposites, revealing different gas recovery mechanisms during pressure depletion and CO2 sequestration. The study suggests CH4 adsorbed state as a potential target for enhanced shale gas recovery. Additionally, increasing water content reduces CH4 recovery during pressure depletion but improves CH4 recovery during CO2 injection.

CHEMICAL ENGINEERING JOURNAL (2021)

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Article Geosciences, Multidisciplinary

Deep learning in pore scale imaging and modeling

Ying Da Wang et al.

Summary: Deep Learning has been integrated into the workflow of pore-scale imaging and modeling, enhancing image quality, automating processes, accelerating simulations, and improving data accuracy.

EARTH-SCIENCE REVIEWS (2021)

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Article Geochemistry & Geophysics

3D rock minerals by correlating XRM and automated mineralogy and its application to digital rock physics for elastic properties

Jin Hao et al.

Summary: Digital rock physics is an emerging technique that relies on obtaining 3D rock structure images, accurately identifying 3D minerals, and using appropriate numerical simulation methods. A new workflow has been developed to obtain high-resolution digital rocks with 3D mineralogical information, offering the potential to explore elastic properties and heterogeneities at a millimeter scale in rocks like shales.

GEOPHYSICS (2021)

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Article Geosciences, Multidisciplinary

Pore network extraction for shale gas flow in nanoporous media

Zhixing Yi et al.

Summary: Most pore network models designed for sandstone may not be applicable for shale due to the presence of nanopores and non-Darcy effects. A new pore network model accounting for these effects was proposed, providing a more accurate solution for shale gas flow simulations. Experiments on a shale sample showed differences in network structures between the new model (APN) and traditional models (IPN).

MARINE AND PETROLEUM GEOLOGY (2021)

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Article Multidisciplinary Sciences

An anisotropic pore-network model to estimate the shale gas permeability

Di Zhang et al.

Summary: The study predicted the shale permeability using a pore network model and verified it by comparing high-pressure permeability tests. Results showed that the anisotropic pore network model had closer predictions to test results, confirming its ability to represent natural gas flow in shale formations.

SCIENTIFIC REPORTS (2021)

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Article Computer Science, Artificial Intelligence

Deep neural networks for improving physical accuracy of 2D and 3D multi-mineral segmentation of rock micro-CT images

Ying Da Wang et al.

Summary: The study tested the performance of 4 CNN architectures for segmentation of 3D micro-CT images of rock samples, and introduced a new hybrid U-Net and ResNet network architecture to improve accuracy.

APPLIED SOFT COMPUTING (2021)

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Article Computer Science, Interdisciplinary Applications

Pore-scale gas flow simulations by the DSBGK and DVM methods

Jun Li et al.

Summary: This study compares the computational performance of two methods (DSBGK and DVM) for simulating 3D gas flows in shale rock, finding that DSBGK simulation converges faster, is significantly cheaper, and performs better, making it a practical tool for simulations.

COMPUTERS & FLUIDS (2021)

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Review Geosciences, Multidisciplinary

A critical review on pore to continuum scale imaging techniques for enhanced shale gas recovery

Debanjan Chandra et al.

Summary: Imaging and image analysis of shale provide valuable insights into its properties, with different methods offering complementary information. However, choosing the appropriate imaging tools is crucial for visualizing the desired features effectively.

EARTH-SCIENCE REVIEWS (2021)

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Article Thermodynamics

Contribution quantification of nanoscale gas transport in shale based on strongly inhomogeneous kinetic model

Baochao Shan et al.

Summary: The study reveals that slip flow dominates in the bulk region while enhanced surface diffusion mainly contributes to the total mass flux in the adsorbed region of organic pores in shale nanopores. On the other hand, no slip is observed in inorganic pores, indicating significant differences in gas transport mechanisms between organic and inorganic pores, which is crucial for a better understanding of gas transport in shale gas reservoirs.

ENERGY (2021)

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Review Thermodynamics

A review of transport mechanisms and models for unconventional tight shale gas reservoir systems

Suleiman Akilu et al.

Summary: Gas transport in unconventional reservoirs, especially tight shale reservoirs, is highly complex and influenced by factors such as pore structures and fluid-pore wall interactions. Analyzing models and methods vary in their ability to capture the physics of tight gas reservoir systems accurately. Comprehensive consideration of multiple effects is crucial for predicting recoverable gas resources in shales.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Engineering, Environmental

Nanoscale confined multicomponent hydrocarbon thermodynamic phase behavior and multiphase transport ability in nanoporous material

Wenhui Song et al.

CHEMICAL ENGINEERING JOURNAL (2020)

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Article Engineering, Multidisciplinary

Cam-Clay plasticity. Part IX: On the anisotropy, heterogeneity, and viscoplasticity of shale

Ronaldo Borja et al.

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING (2020)

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Article Geochemistry & Geophysics

Pore-Scale 3D Dynamic Modeling and Characterization of Shale Samples: Considering the Effects of Thermal Maturation

Yuqi Wu et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2020)

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Review Energy & Fuels

Modeling of multi-scale transport phenomena in shale gas production - A critical review

Hui Wang et al.

APPLIED ENERGY (2020)

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Article Energy & Fuels

Nanoscale pore structure and mechanical property analysis of coal: An insight combining AFM and SEM images

Yong Li et al.

FUEL (2020)

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Article Energy & Fuels

Slip length of methane flow under shale reservoir conditions: Effect of pore size and pressure

Yiling Nan et al.

FUEL (2020)

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Article Energy & Fuels

Molecular simulations of competitive adsorption behavior between CH4-C2H6 in K-illite clay at supercritical conditions

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The Transport Mechanisms and Dynamics of Shale via Multiscale Multiphysics Pore Network Modeling

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Dynamic pore network modelling of real gas transport in shale nanopore structure

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Coupled generative adversarial and auto-encoder neural networks to reconstruct three-dimensional multi-scale porous media

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Correlative core- to pore-scale imaging of shales

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Stochastic reconstruction of 3D porous media from 2D images using generative adversarial networks

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Upscaling Water Flow in Composite Nanoporous Shale Matrix Using Lattice Boltzmann Method

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WATER RESOURCES RESEARCH (2020)

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Molecular dynamics of methane flow behavior through realistic organic nanopores under geologic shale condition: Pore size and kerogen types

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CHEMICAL ENGINEERING JOURNAL (2020)

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Adsorption behaviors of shale oil in kerogen slit by molecular simulation

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CHEMICAL ENGINEERING JOURNAL (2020)

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Multiscale gas transport behavior in heterogeneous shale matrix consisting of organic and inorganic nanopores

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Simultaneous assessment of wettability and water saturation using 2D NMR measurements

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Full-scale nanopore system and fractal characteristics of clay-rich lacustrine shale combining FE-SEM, nano-CT, gas adsorption and mercury intrusion porosimetry

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Pore-scale simulations of electrical and elastic properties of shale samples based on multicomponent and multiscale digital rocks

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Micro- and Nano-Scale Pore Structure in Gas Shale Using Xμ-CT and FIB-SEM Techniques

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Characterization of the Full-Sized Pore Structure of Coal-Bearing Shales and Its Effect on Shale Gas Content

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Numerical simulation of hydro-mechanical coupling in fractured vuggy porous media using the equivalent continuum model and embedded discrete fracture model

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Quantitative study on coal and shale pore structure and surface roughness based on atomic force microscopy and image processing

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Pore Network Modeling of Shale Gas Reservoirs: Gas Desorption and Slip Flow Effects

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Flow Mechanism and Simulation Approaches for Shale Gas Reservoirs: A Review

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Micro-scale investigation on coupling of gas diffusion and mechanical deformation of shale

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Effect of Microstructural Flexibility on Methane Flow in Kerogen Matrix by Molecular Dynamics Simulations

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Multiscale simulations of shale gas transport in micro/nano-porous shale matrix considering pore structure influence

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Pore structure evolution of lacustrine shales containing Type I organic matter from the Upper Cretaceous Qingshankou Formation, Songliao Basin, China: A study of artificial samples from hydrous pyrolysis experiments

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Validating the Generalized Pore Network Model Using Micro-CT Images of Two-Phase Flow

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Nanoscale confined gas and water multiphase transport in nanoporous shale with dual surface wettability

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Comparative analysis on pore-scale permeability prediction on micro-CT images of rock using numerical and empirical approaches

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Nuclear magnetic resonance simulations of nano-scale cores and microscopic mechanisms of oil shale

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Full-scale pores and micro-fractures characterization using FE-SEM, gas adsorption, nano-CT and micro-CT: A case study of the Silurian Longmaxi Formation shale in the Fuling area, Sichuan Basin, China

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Geochemical characterization and quantitative evaluation of shale oil reservoir by two-dimensional nuclear magnetic resonance and quantitative grain fluorescence on extract: A case study from the Qingshankou Formation in Southern Songliao Basin, northeast China

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Multiscale modeling of shale samples based on low- and high-resolution images

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Competitive adsorption of methane and ethane in montmorillonite nanopores of shale at supercritical conditions: A grand canonical Monte Carlo simulation study

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Static and dynamic behavior of CO2 enhanced oil recovery in shale reservoirs: Experimental nanofluidics and theoretical models with dual-scale nanopores

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Microstructural investigation of different nanopore types in marine-continental transitional shales: Examples from the Longtan formation in Southern Sichuan Basin, south China

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Comparative Porosity and Pore Structure Assessment in Shales: Measurement Techniques, Influencing Factors and Implications for Reservoir Characterization

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Pore scale study of multiphase multicomponent reactive transport during CO2 dissolution trapping

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Pore characterization and clay bound water assessment in shale with a combination of NMR and low-pressure nitrogen gas adsorption

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Pore network modeling of the Non-Darcy flows in shale and tight formations

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The wettability of shale by NMR measurements and its controlling factors

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Molecular Simulation of CO2/CH4 Competitive Adsorption on Shale Kerogen for CO2 Sequestration and Enhanced Gas Recovery

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Porous Structure Reconstruction Using Convolutional Neural Networks

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Quantifying nano-pore heterogeneity and anisotropy in gas shale by synchrotron radiation nano-CT

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Molecular simulation of methane adsorption and its effect on kaolinite swelling as functions of pressure and temperature

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Slip Velocity of Methane Flow in Nanopores With Kerogen and Quartz Surfaces

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Stochastic Reconstruction of an Oolitic Limestone by Generative Adversarial Networks

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Monte Carlo simulations of methane adsorption on kaolinite as a function of pore size

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Methane Adsorption and Self-Diffusion in Shale Kerogen and Slit Nanopores by Molecular Simulations

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Intrinsic and apparent gas permeability of heterogeneous and anisotropic ultra-tight porous media

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Proceedings Paper Engineering, Environmental

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Experimental evaluation of CO2 enhanced recovery of adsorbed-gas from shale

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Molecular insight into the micro-behaviors of CH4 and CO2 in montmorillonite slit-nanopores

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An Integrative Model To Simulate Gas Transport and Production Coupled With Gas Adsorption, Non-Darcy Flow, Surface Diffusion, and Stress Dependence in Organic-Shale Reservoirs

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Klinkenberg slippage effect in the permeability computations of shale gas by the pore-scale simulations

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Multiscale study for stochastic characterization of shale samples

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Apparent gas permeability in an organic-rich shale reservoir

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Pore-scale simulation of shale gas production considering the adsorption effect

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Characterization of shales using T-1-T-2 NMR maps

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2D and 3D nanopore characterization of gas shale in Longmaxi formation based on FIB-SEM

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Heterogeneous nanoporosity of the Silurian Longmaxi Formation shale gas reservoir in the Sichuan Basin using the QEMSCAN, FIB-SEM, and nano-CT methods

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Effect of surface chemistry for CH4/CO2 adsorption in kerogen: A molecular simulation study

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JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2016)

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Article Multidisciplinary Sciences

Confinement Correction to Mercury Intrusion Capillary Pressure of Shale Nanopores

Sen Wang et al.

SCIENTIFIC REPORTS (2016)

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Article Chemistry, Physical

Molecular simulation of preferential adsorption of CO2 over CH4 in Na-montmorillonite clay material

Nannan Yang et al.

APPLIED SURFACE SCIENCE (2015)

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Article Energy & Fuels

A precise measurement method for shale porosity with low-field nuclear magnetic resonance: A case study of the Carboniferous-Permian strata in the Linxing area, eastern Ordos Basin, China

Hao Xu et al.

FUEL (2015)

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A stochastic permeability model for the shale-gas systems

Morteza Elahi Naraghi et al.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2015)

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Article Energy & Fuels

A comparison of experimental methods for describing shale pore features - A case study in the Bohai Bay Basin of eastern China

Jijun Li et al.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2015)

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Article Physics, Fluids & Plasmas

Generalized lattice Boltzmann model for flow through tight porous media with Klinkenberg's effect

Li Chen et al.

PHYSICAL REVIEW E (2015)

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Article Engineering, Multidisciplinary

Pore scale simulation of liquid and gas two-phase flow based on digital core technology

Zhang Lei et al.

SCIENCE CHINA-TECHNOLOGICAL SCIENCES (2015)

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Article Engineering, Chemical

Three-Dimensional Stochastic Characterization of Shale SEM Images

Pejman Tahmasebi et al.

TRANSPORT IN POROUS MEDIA (2015)

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Article Energy & Fuels

New pore space characterization method of shale matrix formation by considering organic and inorganic pores

Yongfei Yang et al.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2015)

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Article Engineering, Chemical

A Lattice Boltzmann Model for Simulating Gas Flow in Kerogen Pores

Junjie Ren et al.

TRANSPORT IN POROUS MEDIA (2015)

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The effect of microporosity on transport properties in porous media

Ayaz Mehmani et al.

ADVANCES IN WATER RESOURCES (2014)

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Article Water Resources

Direct simulations of two-phase flow on micro-CT images of porous media and upscaling of pore-scale forces

Ali Q. Raeini et al.

ADVANCES IN WATER RESOURCES (2014)

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Article Chemistry, Physical

Methane Aqueous Fluids in Montmorillonite Clay Interlayer under Near-Surface Geological Conditions: A Grand Canonical Monte Carlo and Molecular Dynamics Simulation Study

Qi Rao et al.

JOURNAL OF PHYSICAL CHEMISTRY B (2014)

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Article Engineering, Petroleum

Optic Imaging of Two-Phase-Flow Behavior in 1D Nanoscale Channels

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SPE JOURNAL (2014)

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Article Engineering, Chemical

Numerical Modelling of Sub-pore Scale Events in Two-Phase Flow Through Porous Media

Ali Q. Raeini et al.

TRANSPORT IN POROUS MEDIA (2014)

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Article Geosciences, Multidisciplinary

Organic matter-hosted pore system, Marcellus Formation (Devonian), Pennsylvania

Kitty L. Milliken et al.

AAPG BULLETIN (2013)

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Article Water Resources

Pore-scale imaging and modelling

Martin J. Blunt et al.

ADVANCES IN WATER RESOURCES (2013)

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Article Energy & Fuels

Pore structure characterization of North American shale gas reservoirs using USANS/SANS, gas adsorption, and mercury intrusion

C. R. Clarkson et al.

FUEL (2013)

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Article Energy & Fuels

The construction of carbonate digital rock with hybrid superposition method

Jun Yao et al.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2013)

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Article Geosciences, Multidisciplinary

Characterization of pore systems in seal rocks using Nitrogen Gas Adsorption combined with Mercury Injection Capillary Pressure techniques

Mayka Schmitt et al.

MARINE AND PETROLEUM GEOLOGY (2013)

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Article Engineering, Petroleum

Lattice Boltzmann Method for Simulation of Shale Gas Transport in Kerogen

Ebrahim Fathi et al.

SPE JOURNAL (2013)

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Article Geosciences, Multidisciplinary

Characterization of gas shale pore systems by porosimetry, pycnometry, surface area, and field emission scanning electron microscopy/transmission electron microscopy image analyses: Examples from the Barnett, Woodford, Haynesville, Marcellus, and Doig units

Gareth R. Chalmers et al.

AAPG BULLETIN (2012)

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Article Geosciences, Multidisciplinary

Spectrum of pore types and networks in mudrocks and a descriptive classification for matrix-related mudrock pores

Robert G. Loucks et al.

AAPG BULLETIN (2012)

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Article Energy & Fuels

Development of organic porosity in the Woodford Shale with increasing thermal maturity

Mark E. Curtis et al.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2012)

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Article Energy & Fuels

Formation of nanoporous pyrobitumen residues during maturation of the Barnett Shale (Fort Worth Basin)

Sylvain Bernard et al.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2012)

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Article Energy & Fuels

Atomic-Force Microscopy: A New Tool for Gas-Shale Characterization

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JOURNAL OF CANADIAN PETROLEUM TECHNOLOGY (2012)

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Article Computer Science, Interdisciplinary Applications

Modelling two-phase flow in porous media at the pore scale using the volume-of-fluid method

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JOURNAL OF COMPUTATIONAL PHYSICS (2012)

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Article Mechanics

Gas flow in ultra-tight shale strata

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JOURNAL OF FLUID MECHANICS (2012)

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Laboratory characterisation of shale properties

M. Josh et al.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2012)

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Article Geosciences, Multidisciplinary

Geochemical evolution of organic-rich shales with increasing maturity: A STXM and TEM study of the Posidonia Shale (Lower Toarcian, northern Germany)

Sylvain Bernard et al.

MARINE AND PETROLEUM GEOLOGY (2012)

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Article Engineering, Chemical

Knudsen's Permeability Correction for Tight Porous Media

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TRANSPORT IN POROUS MEDIA (2012)

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An Algorithm for 3D Pore Space Reconstruction from a 2D Image Using Sequential Simulation and Gradual Deformation with the Probability Perturbation Sampler

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TRANSPORT IN POROUS MEDIA (2012)

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Unconventional hydrocarbon resources in China and the prospect of exploration and development

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PETROLEUM EXPLORATION AND DEVELOPMENT (2012)

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Shale-Gas Permeability and Diffusivity Inferred by Improved Formulation of Relevant Retention and Transport Mechanisms

Faruk Civan et al.

TRANSPORT IN POROUS MEDIA (2011)

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Article Chemistry, Applied

Relationship between pore volumes and surface areas derived from the evaluation of N2-sorption data by DR-, BET- and t-plot

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MICROPOROUS AND MESOPOROUS MATERIALS (2010)

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Article Energy & Fuels

Nanopores and Apparent Permeability of Gas Flow in Mudrocks (Shales and Siltstone)

F. Javadpour

JOURNAL OF CANADIAN PETROLEUM TECHNOLOGY (2009)

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MORPHOLOGY, GENESIS, AND DISTRIBUTION OF NANOMETER-SCALE PORES IN SILICEOUS MUDSTONES OF THE MISSISSIPPIAN BARNETT SHALE

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Article Energy & Fuels

Efficient field-scale simulation of black oil in a naturally fractured reservoir through discrete fracture networks and homogenized media

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SPE RESERVOIR EVALUATION & ENGINEERING (2008)

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Article Engineering, Chemical

3D stochastic modelling of heterogeneous porous media - Applications to reservoir rocks

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TRANSPORT IN POROUS MEDIA (2006)

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Lattice Boltzmann method for gaseous microflows using kinetic theory boundary conditions

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PHYSICS OF FLUIDS (2005)

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Pore space reconstruction using multiple-point statistics

H Okabe et al.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2005)

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Prediction of permeability for porous media reconstructed using multiple-point statistics

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PHYSICAL REVIEW E (2004)

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Velocity boundary condition at solid walls in rarefied gas calculations

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PHYSICAL REVIEW E (2004)

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Lattice Boltzmann model for incompressible flows through porous media

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PHYSICAL REVIEW E (2002)

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Mesoscopic modeling of slip motion at fluid-solid interfaces with heterogeneous catalysis - art. no. 0645022

S Succi

PHYSICAL REVIEW LETTERS (2002)

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Process based reconstruction of sandstones and prediction of transport properties

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TRANSPORT IN POROUS MEDIA (2002)

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