4.7 Article

A particle-scale study of the triaxial compression behavior of methane hydrate-bearing sands

Related references

Note: Only part of the references are listed.
Article Chemistry, Physical

Promoting Effect of Common Marine Cations on Hydrate Dissociation and Structural Evolution under a Static Electric Field

Bingbing Chen et al.

Summary: In this study, a new method of hydrate dissociation using seawater and electrostatic fields cooperatively (SE method) was proposed. Molecular dynamics simulations were used to investigate the thermodynamic properties and structural changes of methane hydrate in multiple salt solutions under an electrostatic field. The results showed that the electric field can drive cations into the hydrate phase, accelerating hydrate dissociation.

JOURNAL OF PHYSICAL CHEMISTRY B (2023)

Article Energy & Fuels

A particle-scale investigation of mechanical behavior of cemented sediment Discrete Element Method

Yanghui Li et al.

Summary: Natural gas hydrate is a clean energy source with high density and considerable reserves. This study focuses on the mechanical behavior of cemented hydrate-bearing sediments and reveals the effect of cementation on their properties. Through numerical simulation tests, it is found that cementation improves the strength and stiffness of the sediments, while the presence of hydrates mainly enhances stiffness. The particle-scale investigation shows that increasing confining pressure and hydrate cementation limit slip and rearrangement of sand particles, leading to strengthened strength. Shear band formation is related to cementation failure.

GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT (2023)

Article Thermodynamics

Compression-induced dynamic change in effective permeability of hydrate-bearing sediments during hydrate dissociation by depressurization

Fanbao Cheng et al.

Summary: Methane hydrate, also known as flammable ice, is a clean energy source that has gained global attention as an alternative to traditional fossil fuels. The effective permeability, which is influenced by hydrate saturation and porosity changes, plays a crucial role in determining the gas production rate. This study conducted experiments to measure the effective permeability of hydrate-bearing sediments with varying hydrate saturation. The results showed that the effective permeability decreased with increasing hydrate saturation and effective stress. A formula was proposed to estimate the change in effective permeability during hydrate dissociation, and it was integrated into a thermal-hydraulic model to predict gas production under effective stress. The study provided valuable insights into compression-induced changes in effective permeability and gas/water production during hydrate dissociation.

ENERGY (2023)

Article Thermodynamics

Microstructure evolution and dynamic permeability anisotropy during hydrate dissociation in sediment under stress state

Peng Wu et al.

Summary: In this study, depressurizing dissociation was conducted on a hydrate-bearing sandy specimen using X-ray CT under triaxial stress. The results show that hydrate dissociation starts from the hydrate-gas interface and then results in the formation of cavities among patchy clusters. As the hydrate particle dissociates to a smaller size, the dissociated water gathers on the surface of the hydrate, preventing contact between the hydrate and gas phases. Subsidence is observed even at a low isotropic stress of 1 MPa after hydrate dissociation. Furthermore, the pore system characteristics vary with decreasing hydrate saturation, and the permeability of the hydrate-bearing sediment increases exponentially with decreasing hydrate saturation and is anisotropic due to the inhomogeneity of hydrate dissociation, which can be predicted via electrical conductivity.

ENERGY (2023)

Article Thermodynamics

Gas permeability variation during methane hydrate dissociation by depressurization in marine sediments

Haijun Wang et al.

Summary: This study investigated the influence of hydrate saturation and effective stress on permeability change. It found that hydrate saturation has a dominant effect on permeability dynamic change under low effective stress, while effective stress variation dominates at higher effective stresses. Additionally, compression was found to enhance heat transfer efficiency in high-saturation samples.

ENERGY (2023)

Article Thermodynamics

Gas recovery from marine hydrate reservoir: Experimental investigation on gas flow patterns considering pressure effect

Haijun Wang et al.

Summary: Accurate understanding of fluid flow patterns in hydrate-bearing sediments is crucial for economic exploitation. This study investigates the effects of hydrate saturation, effective stress, pore pressure, and osmotic pressure on gas flow patterns. The results show that as hydrate saturation increases, gas flow transitions from viscous flow to slip flow, with the slippage effect becoming more pronounced. Effective stress affects gas permeability's sensitivity to osmotic pressure changes, particularly at lower hydrate saturation. Pore pressure has a minimal impact on gas permeability and flow pattern, while reducing osmotic pressure weakens the slippage effect. Finally, a semi-empirical permeability model is developed based on experimental data.

ENERGY (2023)

Article Thermodynamics

Deformation characteristics of methane hydrate-bearing clayey and sandy sediments during depressurization dissociation

Yanghui Li et al.

Summary: Natural gas hydrate, as a promising new energy, has attracted wide attention in the past decades. Experimental efforts have been made to explore the mechanical characteristics of hydrate-bearing clayey sediment under stable conditions, but few studies focus on its creep characteristics during the dissociation process. This study presents triaxial creep test results of methane hydrate-bearing clayey sediment using the depressurization dissociation method, with methane hydrate-bearing sandy sediments added for comparison. The results show that depressurization has little effect on axial strain but increases volumetric strain and reduces equivalent Poisson's ratio.

ENERGY (2023)

Article Energy & Fuels

Mechanical properties of methane hydrate-bearing sandy sediments under various temperatures and pore pressures

Shi Shen et al.

Summary: This study conducted mechanical experiments to investigate the effects of temperature and pore pressure on methane hydrate-bearing sediments (MHBSs). The results showed that with decreasing temperature and increasing pore pressure, the strength of the samples increased, and the dilatant volumetric strain also increased. The study also established a numerical relation between strength, temperature, and pore pressure.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2022)

Article Computer Science, Interdisciplinary Applications

DEM investigation of the effect of hydrate morphology on the mechanical properties of hydrate-bearing sands

Yanlu Ding et al.

Summary: Understanding the engineering properties of hydrate-bearing sands (HBS) is crucial for assessing the safety of natural gas hydrate exploitation. However, precise testing of HBS specimens with different hydrate morphologies has been difficult due to the challenges in controlling hydrate formation in the laboratory. In this study, the discrete element method (DEM) is employed to create HBS models with various hydrate morphologies, and biaxial compression tests are simulated to evaluate their mechanical properties. The numerical results demonstrate that the shear strength and secant modulus of HBS are affected by hydrate morphology and saturation, and relationships between micro mechanical analyses and macro mechanical properties are established. These findings provide valuable insights into the mechanical responses of HBS with complex hydrate morphologies.

COMPUTERS AND GEOTECHNICS (2022)

Article Energy & Fuels

Effect of Hydrate Distribution on the Mechanical Response of Hydrate-Bearing Sand: Discrete Element Method Simulation

Zeshao You et al.

Summary: This study investigates the strengthening mechanisms of hydrate-bearing sediments under different hydrate distributions using the discrete element method. The results show that randomly distributed hydrates enhance the peak strength of the sediment, while gathered hydrates contribute to the residual strength.

ENERGY & FUELS (2022)

Article Engineering, Geological

Hydrate-bearing sediment of the South China Sea: Microstructure and mechanical characteristics

Peng Wu et al.

Summary: The mechanical characteristics of clayey-silty sediments in the South China Sea, which are reservoirs for offshore hydrate production, were comprehensively investigated in this study. Both micro and macro analyses were conducted, revealing the distribution and morphology of hydrates and obtaining important input parameters for the development of constitutive models and numerical simulations. The findings also indicated differences between the South China Sea sediments and the hydrate reservoir in the Krishna-Godavari Basin.

ENGINEERING GEOLOGY (2022)

Article Engineering, Geological

Undrained triaxial tests on water-saturated methane hydrate-bearing clayey-silty sediments of the South China Sea

Lei Wang et al.

Summary: Research has shown that in fine-grained sediments in the South China Sea, the failure strength of methane hydrate-bearing sediments increases with the increase in hydrate saturation and initial effective mean stress. Additionally, the excess pore-water pressure of methane hydrate-bearing sediments remains positive during shear. It is observed that as the hydrate saturation increases, cohesion in the Mohr-Coulomb model increases while the internal friction angle has little dependence on the hydrate saturation.

CANADIAN GEOTECHNICAL JOURNAL (2021)

Article Energy & Fuels

Effect of Temperature on the Mechanical Properties of Hydrate-Bearing Sand under Different Confining Pressures

Shi Shen et al.

Summary: Experimental data from mechanical experiments on HBSs at different temperatures and effective confining pressures revealed a significant correlation between the samples' mechanical properties and temperature and effective confining pressure. The strength of HBSs was found to be positively correlated with effective confining pressure and negatively correlated with temperature. Furthermore, the stress-strain behaviors of the samples shifted from hardening to softening with decreasing effective confining pressure and temperature.

ENERGY & FUELS (2021)

Article Energy & Fuels

Analysis of the mechanical properties of methane hydrate-bearing sands with various pore pressures and confining pressures

Shi Shen et al.

Summary: The study investigated the mechanical properties of methane hydrate-bearing sediments under different pore pressures and effective confining pressures through a series of tests, revealing that the strength of samples increased with increasing pressures. Additionally, factors influencing the failure stress points lines for the samples were identified, including the increase in cohesion with increasing pore pressure.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2021)

Article Energy & Fuels

A numerical investigation on the mechanical properties of hydrate-bearing sand using Distinct Element Method

Zeshao You et al.

Summary: This study used the Distinct Element Method to simulate the microstructure of hydrate and conducted biaxial compression tests to investigate the mechanical properties of hydrate-bearing sediments. The results showed that hydrate enhances the cohesive and frictional strength of the sediments.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2021)

Article Energy & Fuels

Investigation of the effect of cementing ratio on the mechanical properties and strain location of hydrate-bearing sediments by using DEM

Hui Wang et al.

Summary: This study investigates the strain location and particle-scale contact properties of methane hydrate-bearing sediments with different cementing ratios through DEM, and finds that the increase of hydrate cementing ratios leads to enhanced strength and volumetric dilatancy. Samples with lower cementing ratio exhibit two shear bands while samples with higher cementing ratio exhibit single shear band.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2021)

Article Engineering, Geological

Damage Evolution of Coal with Inclusions Under Triaxial Compression

Yufeng Zhao et al.

Summary: Through laboratory tests and numerical simulations, this study investigates the fracture and damage evolution in coal layers to understand better their structural stability. The distribution of inclusions within coal samples significantly influences strength, deformation, and damage patterns.

ROCK MECHANICS AND ROCK ENGINEERING (2021)

Article Multidisciplinary Sciences

Mechanical behaviors of hydrate-bearing sediment with different cementation spatial distributions at microscales

Yanghui Li et al.

Summary: The study reveals that specimens with more dispersed hydrate distribution exhibit larger peak strength, slower localized deformation development, and steeper shear band compared to those with less dispersed hydrate distribution. However, the changing rate of pore space characteristic is not affected by hydrate spatial distribution. Additionally, specimens with more dispersed hydrate distribution have a larger hydrate-sand interfacial area which increases rapidly with axial loading before slowing down due to cementation structure failure.

ISCIENCE (2021)

Article Geosciences, Multidisciplinary

Pore-Scale Investigation Of Methane Hydrate-Bearing Sediments Under Triaxial Condition

Liang Lei et al.

GEOPHYSICAL RESEARCH LETTERS (2020)

Article Engineering, Geological

DEM study on the undrained mechanical behavior of gassy sand

Juntian Hong et al.

ACTA GEOTECHNICA (2020)

Article Geochemistry & Geophysics

Cementation Failure Behavior of Consolidated Gas Hydrate-Bearing Sand

Peng Wu et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2020)

Review Engineering, Chemical

The status of exploitation techniques of natural gas hydrate

Lei Yang et al.

CHINESE JOURNAL OF CHEMICAL ENGINEERING (2019)

Article Geochemistry & Geophysics

Investigation on the Multiparameter of Hydrate-Bearing Sands Using Nano-Focus X-Ray Computed Tomography

Chengfeng Li et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2019)

Article Engineering, Geological

DEM simulation of grain-coating type methane hydrate bearing sediments along various stress paths

Mingjing Jiang et al.

ENGINEERING GEOLOGY (2019)

Article Geosciences, Multidisciplinary

In Situ Mechanical Properties of Shallow Gas Hydrate Deposits in the Deep Seabed

Jun Yoneda et al.

GEOPHYSICAL RESEARCH LETTERS (2019)

Article Geochemistry & Geophysics

The Effects of Hydrate on the Strength and Stiffness of Some Sands

B. N. Madhusudhan et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2019)

Article Geosciences, Multidisciplinary

Pore-Scale Visualization of Methane Hydrate-Bearing Sediments With Micro-CT

Liang Lei et al.

GEOPHYSICAL RESEARCH LETTERS (2018)

Article Energy & Fuels

Experimental investigation on the mechanical properties of methane hydrate-bearing sand formed with rounded particles

Shintaro Kajiyama et al.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2017)

Article Geochemistry & Geophysics

Influence of Fines Content on the Mechanical Behavior of Methane Hydrate-Bearing Sediments

Masayuki Hyodo et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2017)

Article Computer Science, Interdisciplinary Applications

DEM simulation of bonded granular material. Part II: Extension to grain-coating type methane hydrate bearing sand

Zhifu Shen et al.

COMPUTERS AND GEOTECHNICS (2016)

Article Computer Science, Interdisciplinary Applications

Discrete element modelling of methane hydrate soil sediments using elongated soil particles

Yanxin Yu et al.

COMPUTERS AND GEOTECHNICS (2016)

Article Geosciences, Multidisciplinary

Strengthening mechanism of cemented hydrate-bearing sand at microscales

Jun Yoneda et al.

GEOPHYSICAL RESEARCH LETTERS (2016)

Article Materials Science, Multidisciplinary

DEM simulation of the undrained shear behavior of sand containing dissociated gas hydrate

Ming Xu et al.

GRANULAR MATTER (2016)

Article Materials Science, Multidisciplinary

DEM simulation of the undrained shear behavior of sand containing dissociated gas hydrate

Ming Xu et al.

GRANULAR MATTER (2016)

Article Computer Science, Interdisciplinary Applications

Particle mechanics modeling of creep behavior of rockfill materials under dry and wet conditions

Zhihong Zhao et al.

COMPUTERS AND GEOTECHNICS (2015)

Article Geochemistry & Geophysics

Microstructural evolution of gas hydrates in sedimentary matrices observed with synchrotron X-ray computed tomographic microscopy

Marwen Chaouachi et al.

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS (2015)

Article Geosciences, Multidisciplinary

Study on the mechanical properties of hydrate-bearing silty clay

X. H. Zhang et al.

MARINE AND PETROLEUM GEOLOGY (2015)

Article Geochemistry & Geophysics

Mechanical behavior of gas-saturated methane hydrate-bearing sediments

Masayuki Hyodo et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2013)

Proceedings Paper Nanoscience & Nanotechnology

Study on Small-strain Behaviours of Methane Hydrate Sandy Sediments Using Discrete Element Method

Yanxin Yu et al.

POWDERS AND GRAINS 2013 (2013)

Article Geochemistry & Geophysics

Hydrate morphology: Physical properties of sands with patchy hydrate saturation

S. Dai et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2012)

Article Geochemistry & Geophysics

Hydrate adhesive and tensile strengths

J. W. Jung et al.

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS (2011)

Article Geochemistry & Geophysics

Triaxial compressive properties of artificial methane-hydrate-bearing sediment

Kuniyuki Miyazaki et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2011)

Article Mechanics

A generalized anisotropic failure criterion for geomaterials

Zhiwei Gao et al.

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES (2010)

Review Geochemistry & Geophysics

PHYSICAL PROPERTIES OF HYDRATE-BEARING SEDIMENTS

W. F. Waite et al.

REVIEWS OF GEOPHYSICS (2009)

Article Engineering, Geological

A particulate-scale investigation of cemented sand behavior

Y. -H. Wang et al.

CANADIAN GEOTECHNICAL JOURNAL (2008)

Article Geochemistry & Geophysics

Mechanical properties of sand, silt, and clay containing tetrahydrofuran hydrate

T. S. Yun et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2007)

Article Engineering, Geological

A bonded-particle model for rock

DO Potyondy et al.

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES (2004)

Review Multidisciplinary Sciences

Fundamental principles and applications of natural gas hydrates

ED Sloan

NATURE (2003)

Article Chemistry, Applied

Methane hydrates potential as a future energy source

SY Lee et al.

FUEL PROCESSING TECHNOLOGY (2001)

Article Engineering, Geological

Numerical simulations of deviatoric shear deformation of granular media

C Thornton

GEOTECHNIQUE (2000)