4.7 Article

Mechanical Characteristics of Underconsolidated Methane Hydrate- Bearing Clayed-Silty Sediments

Related references

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

Interfacial mechanical properties of tetrahydrofuran hydrate-solid surfaces: Implications for hydrate management

Yanwen Lin et al.

Summary: Understanding the interfacial mechanical properties between hydrate and solids is crucial for designing surfaces for hydrate management. This study examined the effects of surface wettability, solid substrate type, and temperature on the adhesion properties between THF hydrate and ice. The results showed that the adhesion strength of THF hydrate and ice varied with the composition of the coating, and the adhesion strength of ice was greater than that of THF hydrate for all investigated solid substrates. Additionally, the adhesion of THF hydrate on inorganic glass surfaces was found to be enhanced as a function of the receding contact angle. Molecular dynamics simulations revealed that the adhesion strength of ice on solid substrates was primarily influenced by the quasi-liquid water layer, while the adhesion of hydrate was also affected by newly formed unconventional clathrate cages. This study provides valuable insights for developing coatings to manage hydrates.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2023)

Article Energy & Fuels

Effect of clay type and content on the mechanical properties of clayey silt hydrate sediments

Qiongqiong Tang et al.

Summary: Knowledge of the mechanical properties of natural gas hydrate reservoirs is crucial for the safe and commercial extraction of natural gas hydrate. This study investigated the effects of clay type and content on the failure strength and deformation of clayey silt hydrate sediments. It was found that samples containing illite generally exhibited higher strength and stiffness, while samples containing montmorillonite had higher cohesion. These findings provide valuable insights for the assessment of reservoirs and the design of safe wellbores.

GEOENERGY SCIENCE AND ENGINEERING (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 Computer Science, Interdisciplinary Applications

3D DEM modeling on mechanical weakening of gas hydrate-bearing sandy sediments during hydrate dissociation

Xiaofeng Dou et al.

Summary: This study presents a novel approach based on the discrete element method (DEM) to describe the mechanical weakening of cementing-type gas hydrate-bearing sandy sediments (GHBSSs) during hydrate dissociation. The DEM model successfully captures the mechanical weakening behaviors of GHBSSs, and a fitting equation is obtained to describe the relationship among peak strength, initial hydrate saturation, and hydrate dissociation ratio. This study is valuable for evaluating the stability of GHBSSs during hydrate production.

COMPUTERS AND GEOTECHNICS (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

Methane hydrate re-formation and blockage mechanism in a pore-level water-gas flow process

Huiru Sun et al.

Summary: This study analyzes the factors influencing hydrate re-formation characteristics by simulating two-phase flow in hydrate sediment. The results show that temperature and pressure exhibit three stages of change in the water-dominated two-phase flow process. A lower effective sectional velocity of water enhances the hydrate re-formation process. Meanwhile, the gas phase impedes mass transfer on the water-hydrate interface and acts as a nucleation site to promote hydrate re-formation. The onset time of flow blockage is linearly positively correlated with the effective sectional velocity of water, but the amount of hydrate re-formation decreases with increasing velocity.

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 Engineering, Environmental

Effect of sodium montmorillonite clay on the kinetics of CH4 hydrate-implication for energy recovery

Junjie Ren et al.

Summary: This study investigates the effects of montmorillonite clay particles on the formation and dissociation kinetics of methane hydrate (MH). The experimental results reveal that clay particles promote nucleation but delay the growth kinetics of MH. The findings provide insight into the mechanisms of clay particles on the kinetics of MH and have implications for energy recovery from clay-rich hydrate-bearing sediments.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Energy & Fuels

Mechanical properties of remolded hydrate-bearing clayey-silty sediments

Yapeng Zhao et al.

Summary: The majority of global gas hydrate resources are located in clay and silty fine-grained reservoirs. Understanding the mechanical properties of fine-grained hydrate is crucial for its commercialization. However, research on the mechanical properties of fine-grained hydrate has been relatively limited. In this study, experiments were conducted using clay from the South China Sea and quartz sand to investigate the effects of hydrate saturation, effective confining pressure, and clay content on the mechanical properties of hydrate-bearing clayey-silty sediments. The results show that higher hydrate saturation can cause strain softening, and the clay acts as a lubricant, changing the particle relationship from crushing to rotating or sliding.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2022)

Article Engineering, Ocean

Undrained cyclic behavior of under-consolidated soft marine clay with different degrees of consolidation

Jinhuo Zheng et al.

Summary: This study investigates the cyclic behavior of soft marine clay with different consolidation degrees through a series of triaxial tests. The results show that the undrained shear strength decreases and the permanent strain increases as the consolidation degree decreases. The stress-strain hysteretic loops of under-consolidated samples exhibit more distinctive viscoelastic and hysteretic characteristics compared to normally consolidated samples. Moreover, the deformation resistance of the clay rapidly increases in the low consolidation range, but does not significantly increase in the near-normal consolidation range. The critical consolidation degree for soft marine clay is found to be 0.85, which can serve as a standard reference for rapid construction in practical projects.

MARINE GEORESOURCES & GEOTECHNOLOGY (2022)

Article Energy & Fuels

Pore-Scale Investigation for the Influence of Initial Water on CO2-CH4 Exchange in a Hydrate by CO2 Injection

Yingfei Wang et al.

Summary: This study develops a model to investigate the effects of initial water on CO2-CH4 dynamic replacement in a hydrate in a pore network, and validates the model with a previous experiment. The results show that the presence of initial water leads to a faster carbon dioxide displacement, weaker methane hydrate dissociation, more pure carbon dioxide hydrate formation, similar mixed hydrate generation, and a lower exchange rate. The exchange reaction starts at the edges of hydrate distribution areas and progresses towards the inside.

ENERGY & FUELS (2022)

Article Energy & Fuels

Inhibition Effect of Synthesized Ionic Liquids on Hydrate Formation: A Kinetic and Thermodynamic Study

Moumita Maiti et al.

Summary: In this study, the effect of two ionic liquids on the formation and dissociation of hydrates was investigated. The results showed that these ionic liquids were effective in inhibiting hydrate formation both thermodynamically and kinetically. The induction time and formation rate of hydrates were significantly increased in the presence of these ionic liquids compared to pure water. Additionally, the performance of the ionic liquids in hydrate inhibition increased with increasing alkyl chain length.

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 Energy & Fuels

Prospects of gas production from the vertically heterogeneous hydrate reservoirs through depressurization in the Mallik site of Canada

Hongwu Lei et al.

Summary: In this study, a realistic hydrate-reservoir model considering the heterogeneity of permeability, porosity, and hydrate saturation was constructed based on geological data from the Mallik site. The model was validated through field depressurization tests. The results indicate that long-term gas production from hydrate reservoirs at the Mallik site is technically feasible, but the gas production efficiency is generally modest. The vertically heterogeneous hydrate-reservoir with low permeability of clay-layer can effectively block methane gas diffusion in the vertical direction.

ENERGY REPORTS (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

Influence of Particle Size on the Heat and Mass Transfer Characteristics of Methane Hydrate Formation and Decomposition in Porous Media

Xiao-Yan Li et al.

Summary: The study demonstrates that particle size affects the formation and dissociation rates of gas hydrates, with coarser particles being more advantageous for production. Two stages are involved in the formation process, with smaller particles leading to shorter nucleation induction times and faster formation rates.

ENERGY & FUELS (2021)

Review Energy & Fuels

Mechanical Characteristics of Hydrate-Bearing Sediment: A Review

Peng Wu et al.

Summary: This review comprehensively summarizes recent mechanical studies on hydrate-bearing sediment (HBS), clarifies the influences of several important parameters on the mechanical behavior of HBS, discusses corresponding particle-level mechanisms, and investigates the influences of hydrate exploitation techniques on the strength and deformation behavior of HBS. The proposed relationships and mechanisms provide insightful guidance for understanding the mechanical behavior of HBS and developing models for predicting the structural evolution of HBS during NGH exploration and exploitation.

ENERGY & FUELS (2021)

Article Energy & Fuels

Effect of Reciprocating Impact on Methane Hydrate Formation and Dissociation

Peng Xiao et al.

Summary: Morphology observation is an important approach for studying hydrate formation mechanisms. The study found that under reciprocating impact, forming and fracturing of hydrate shells significantly improved hydrate formation, and the memory effect during re-formation affected nucleation rate and gas storage capacity.

ENERGY & FUELS (2021)

Article Energy & Fuels

Pore-Scale Visualization of CH4 Gas Hydrate Dissociation under Permafrost Conditions

Jyoti Shanker Pandey et al.

Summary: The study investigates the effectiveness of combined pressure depletion and thermal stimulation to produce CH4 gas from CH4 gas hydrates under permafrost conditions. It was found that the rate of CH4 gas production is affected by hydrate saturation and initial distribution, and that thermal stimulation can enhance gas production by melting metastable hydrate and surrounding ice cover. These results provide important insights into understanding and predicting the impact of global warming on the dissociation of permafrost-affected gas hydrates.

ENERGY & FUELS (2021)

Review Energy & Fuels

Thermodynamic and Kinetic Promoters for Gas Hydrate Technological Applications

Ahmad A. A. Majid et al.

Summary: Gas hydrates have attracted increasing interest for technological applications in recent years, but challenges such as long induction time and slow growth hinder large-scale applications and commercialization. The addition of hydrate promoters can help improve the nucleation and growth rate of hydrates.

ENERGY & FUELS (2021)

Article Energy & Fuels

Triaxial tests on the overconsolidated methane hydrate-bearing clayey-silty sediments

Peng Wu et al.

Summary: The study investigates the influence of over consolidation on hydrate-bearing sediment, revealing that increasing over consolidation ratio weakens strain-hardening phenomenon and enhances initial elastic modulus and failure strength. Furthermore, increasing hydrate saturation also affects the sediment's properties.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2021)

Article Energy & Fuels

Analysis of Hydrate Heterogeneous Distribution Effects on Mechanical Characteristics of Hydrate-Bearing Sediments

Jian-Wu Liu et al.

Summary: The study showed that the heterogeneity of hydrate distribution significantly affects the mechanical parameters of hydrate-bearing sediments, including elastic modulus, shear strength, and dilation. Anisotropy of the hydrate heterogeneous distribution effect was also observed. Considering the impact of hydrate distribution heterogeneity is essential when characterizing the mechanical properties of GHBS.

ENERGY & FUELS (2021)

Article Energy & Fuels

Triaxial Tests on Water-Saturated Gas Hydrate-Bearing Fine-Grained Samples of the South China Sea under Different Drainage Conditions

Yanghui Li et al.

Summary: Triaxial tests were conducted on water-saturated gas hydrate-bearing fine-grained samples from the South China Sea, revealing that the strength and deformation properties were dependent on effective confining stress and hydrate saturation, with a greater influence of hydrate saturation on gas-saturated samples compared to water-saturated samples. Drainage conditions and boundary conditions played critical roles in determining the strength and deformation characteristics of the hydrate-bearing fine-grained deposits.

ENERGY & FUELS (2021)

Article Energy & Fuels

Numerical Simulation of the Effect of Porous Media Permeability on the Decomposition Characteristics of Natural Gas Hydrate at the Core Scale

Qing-Ping Li et al.

Summary: This study investigates the impact of permeability on the decomposition characteristics of hydrate-bearing sediments using a laboratory model. Results show that cores with low permeability experience faster pressure reduction, while cores with high permeability exhibit quicker gas production rates.

ENERGY & FUELS (2021)

Article Astronomy & Astrophysics

Effect of Cylindrical THF Hydrate Veins on the Undrained Behavior of Fine-Grained Soils

Jeffrey A. Priest et al.

Summary: Gas hydrate-filled fractures and veins in fine-grained deep water marine sediments can affect sediment strength and consolidation, potentially leading to slope failures. Experimental results showed that the strength and stiffness of hydrate-bearing specimens increased with vein diameter and confining stress, with the impact of confining stresses reducing for larger diameter veins.

EARTH AND SPACE SCIENCE (2021)

Article Chemistry, Physical

Aggregation Behavior of Asphalt on the Natural Gas Hydrate Surface with Different Surfactant Coverages

Zherui Chen et al.

Summary: The study reveals that asphalt aggregation primarily depends on pi-pi interaction, and with increasing surfactant coverage, larger aggregates are easier to form. Moreover, increasing the concentration of surfactant is not the best solution to resolve pipeline blockage issues, as it is essential to fully utilize the anti-agglomerant effect of asphalt itself.

JOURNAL OF PHYSICAL CHEMISTRY C (2021)

Article Energy & Fuels

Mechanical behavior of hydrate-bearing sands with fine particles under isotropic and triaxial compression

Jiazuo Zhou et al.

Summary: The study found that the addition of illite particles can enhance the compressibility of hydrate-bearing sediments, but may restrict their stiffness and dilatancy. Strength is greatly influenced by hydrate saturation, while the angle of internal friction varies under different hydrate saturation conditions.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2021)

Article Energy & Fuels

Effects of sand contents on mechanical characteristics of methane hydrate-bearing sediments in the permafrost

Yiming Zhu et al.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2020)

Article Geochemistry & Geophysics

Cementation Failure Behavior of Consolidated Gas Hydrate-Bearing Sand

Peng Wu et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2020)

Article Energy & Fuels

Physical and mechanical properties of the overburden layer on gas hydrate-bearing sediments of the South China sea

Lei Wang et al.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2020)

Article Geosciences, Multidisciplinary

The second natural gas hydrate production test in the South China Sea

Jian-liang Ye et al.

CHINA GEOLOGY (2020)

Review Geosciences, Multidisciplinary

A comprehensive review on the geomechanical properties of gas hydrate bearing sediments

K. P. Lijith et al.

MARINE AND PETROLEUM GEOLOGY (2019)

Article Geosciences, Multidisciplinary

Physical properties of fine-grained sediments with segregated hydrate lenses

Liang Lei et al.

MARINE AND PETROLEUM GEOLOGY (2019)

Article Instruments & Instrumentation

Integration of triaxial testing and pore-scale visualization of methane hydrate bearing sediments

Yongkoo Seol et al.

REVIEW OF SCIENTIFIC INSTRUMENTS (2019)

Article Geochemistry & Geophysics

Phase Equilibrium Condition for Pore Hydrate: Theoretical Formulation and Experimental Validation

Jiazuo Zhou et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2019)

Proceedings Paper Energy & Fuels

Mechanical Behaviors of Methane Hydrate-Bearing Sediments Using Montmorillonite Clay

Lei Wang et al.

INNOVATIVE SOLUTIONS FOR ENERGY TRANSITIONS (2019)

Article Engineering, Geological

Influence of vertical cylindrical tetrahydrofuran hydrate veins on fine-grained soil behaviour

William E. Smith et al.

CANADIAN GEOTECHNICAL JOURNAL (2018)

Article Energy & Fuels

Effect of sediment particle size on the mechanical properties of CH4 hydrate-bearing sediments

Tingting Luo et al.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2018)

Article Geosciences, Multidisciplinary

The first offshore natural gas hydrate production test in South China Sea

Jin-fa Li et al.

CHINA GEOLOGY (2018)

Article Chemistry, Physical

Mechanical experiments and constitutive model of natural gas hydrate reservoirs

Chuanliang Yan et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (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 Geosciences, Multidisciplinary

Study on the mechanical properties of hydrate-bearing silty clay

X. H. Zhang et al.

MARINE AND PETROLEUM GEOLOGY (2015)

Article Geosciences, Multidisciplinary

Potential impact of gas hydrate and its dissociation on the strength of host sediment in the Krishna-Godavari Basin

Jeffery A. Priest et al.

MARINE AND PETROLEUM GEOLOGY (2014)

Review Green & Sustainable Science & Technology

The status of natural gas hydrate research in China: A review

Yongchen Song et al.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2014)

Article Geosciences, Multidisciplinary

Strength behavior of methane hydrate bearing sand in undrained triaxial testing

Hossein Ghiassian et al.

MARINE AND PETROLEUM GEOLOGY (2013)

Article Engineering, Geological

Mechanical and dissociation properties of methane hydrate-bearing sand in deep seabed

Masayuki Hyodo et al.

SOILS AND FOUNDATIONS (2013)

Article Geochemistry & Geophysics

Mechanical behavior of gas-saturated methane hydrate-bearing sediments

Masayuki Hyodo et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2013)

Article Geosciences, Multidisciplinary

Gas hydrates in India: Potential and development

Kalachand Sain et al.

GONDWANA RESEARCH (2012)

Article Geochemistry & Geophysics

Critical state soil constitutive model for methane hydrate soil

S. Uchida et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2012)

Article Geochemistry & Geophysics

Triaxial compressive properties of artificial methane-hydrate-bearing sediment

Kuniyuki Miyazaki et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2011)

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 Energy & Fuels

Methane gas hydrate effect on sediment acoustic and strength properties

W. J. Winters et al.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2007)

Article Energy & Fuels

Natural gas-hydrates - A potential energy source for the 21st Century

Y. F. Makogon et al.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2007)

Article Engineering, Ocean

Sediment physical and acoustic properties at ODP Sites 1150 and 1151, Japan Trench

GY Kim et al.

MARINE GEORESOURCES & GEOTECHNOLOGY (2005)

Review Multidisciplinary Sciences

Fundamental principles and applications of natural gas hydrates

ED Sloan

NATURE (2003)

Article Engineering, Geological

Field measurements of shear strength of an underconsolidated marine clay

M Karakouzian et al.

ENGINEERING GEOLOGY (2003)