Experimental Analysis of Elastic Property Variations in Methane Hydrate-Bearing Sediments with Different Porosities DOI Creative Commons
Wei Xu, Bangrang Di, Haifeng Chen

et al.

Journal of Marine Science and Engineering, Journal Year: 2024, Volume and Issue: 12(12), P. 2370 - 2370

Published: Dec. 23, 2024

Natural gas hydrates, a promising clean energy resource, hold substantial potential. Porosity plays crucial role in hydrate systems by influencing formation processes and physical properties. To clarify the effects of porosity on elasticity, we examined methane its acoustic characteristics. Experiments were conducted sediment samples with porosities 23%, 32%, 37%. P- S-wave velocities measured to assess responses. Results show that as saturation increases, sample velocity also rises. However, high-porosity consistently exhibit lower compared low-porosity reach maximum saturation. This behavior is attributed rapid pore filling samples, which blocks flow pathways limits further formation. In contrast, sediments progresses more gradually, maintaining clearer channels resulting relatively higher Higher accelerates shift hydrates from cementing load-bearing morphologies. These findings underscore porosity’s significant influence provide insights into observed variations across different experimental conditions.

Language: Английский

Mechanical properties of gas hydrate-bearing sediments: Research progress, challenges and perspectives DOI
Yapeng Zhao, Gaowei Hu, Lele Liu

et al.

Earth-Science Reviews, Journal Year: 2025, Volume and Issue: 262, P. 105058 - 105058

Published: Feb. 4, 2025

Language: Английский

Citations

2
Estimation on strength parameters of sediments with hydrate layered distribution based on triaxial shearing tests DOI
Lin Dong, Nengyou Wu, Fang Liu

et al.

Gas Science and Engineering, Journal Year: 2024, Volume and Issue: 123, P. 205255 - 205255

Published: Feb. 24, 2024

Language: Английский

Citations

10
Mechanical Characteristics of Gas Hydrate-Bearing Sediments: An Experimental Study from the South China Sea DOI Creative Commons

Qingmeng Yuan,

Liang Kong, Qianyong Liang

et al.

Journal of Marine Science and Engineering, Journal Year: 2024, Volume and Issue: 12(2), P. 301 - 301

Published: Feb. 8, 2024

Clarifying the mechanical characteristics of gas hydrate-bearing sediments (GHBS) from a perspective is crucial for ensuring long-term, safe, and efficient extraction natural hydrates. In this study, seabed soft clay northern South China Sea was utilized to prepare clayey silt samples, aligning with gradation curves related hydrate projects in Shenhu area Sea. Utilizing high-pressure low-temperature triaxial testing system (ETAS), twelve sets shear tests were conducted. The results highlight that increases saturation confining pressure significantly enhance GHBS’ strength stiffness, more pronounced volume expansion observed during shearing. These have elucidated responses GHBS. Subsequently, empirical formulas developed characterize their properties under varying conditions. Additionally, based on experimental data, micro-mechanisms GHBS analyzed, suggesting hydrates notably contribute filling cementing effects GHBS, these changes pressure. This study contributes deeper understanding fundamental

Language: Английский

Citations

6
Elastoplastic constitutive model considering the filling and cementation effects for gas hydrate-bearing sediments: development and finite element implementation DOI Creative Commons

Qingmeng Yuan,

Qianyong Liang, Jinqiang Liang

et al.

Frontiers in Earth Science, Journal Year: 2025, Volume and Issue: 13

Published: April 2, 2025

Dynamic evolution of hydrate filling and cementation effects significantly affects the mechanical behavior gas hydrate-bearing sediments (GHBS). To analyze strength deformation characteristics GHBS under varying effective confining pressures saturations, we use unified hardening model for clays sands (CSUH model) as a framework. A compressive parameter is introduced to describe isotropic compression behavior. Additionally, incorporated adjust yield function, while state parameters are used modify potential strength. An elastoplastic constitutive developed capture strength, stiffness, dilatancy, softening GHBS. Based on user-defined subroutine interface provided by ABAQUS modified Euler integral algorithm with error control, (UMAT) embedded in implement finite element model. Numerical solutions obtained, accuracy verified comparing theoretical experimental data, showing good agreement. The results demonstrate that accurately represents stress-strain relations shear dilatancy various conditions. Furthermore, effectively evaluates responses different formation behaviors environmental loads. These findings provide foundation further engineering applications.

Language: Английский

Citations

0
Integrated test system for interfacial strength and morphology of multi-type hydrate-bearing sediments DOI
Yajuan Zhang, Yanlong Li, Nengyou Wu

et al.

Review of Scientific Instruments, Journal Year: 2024, Volume and Issue: 95(9)

Published: Sept. 1, 2024

Predicting the strength parameters of multi-type sediments containing hydrates is basis and precondition for safe efficient development natural gas hydrates. However, studies on shear mechanical behavior morphology hydrate-bearing (HBS) are still insufficient. Herein, this study presents an integrated test system that can be used to measure interfacial This device integrates specimen preparation, test, observation, data analysis, which helpful comprehensively evaluate strength, roughness, morphology. The propagation characteristics microfractures HBS during shearing obtained, favorable identifying damage failure modes. Preliminary validation experiments have been conducted massive pure hydrate, hydrate–sediment interface, homogenous verify applicability HBS. corresponding analysis method expected support evaluation morphology, thereby promoting a deeper understanding interactions mechanisms hydrate reservoirs.

Language: Английский

Citations

0
Estimating Mechanical Parameters of Hydrate-Bearing Sediments on Basis of Shear Wave Velocity Under Triaxial Compression DOI
Lin Dong,

Hualin Liao,

Yanlong Li

et al.

Journal of Ocean University of China, Journal Year: 2024, Volume and Issue: 23(6), P. 1481 - 1487

Published: Nov. 12, 2024

Language: Английский

Citations

0
Experimental Analysis of Elastic Property Variations in Methane Hydrate-Bearing Sediments with Different Porosities DOI Creative Commons
Wei Xu, Bangrang Di, Haifeng Chen

et al.

Journal of Marine Science and Engineering, Journal Year: 2024, Volume and Issue: 12(12), P. 2370 - 2370

Published: Dec. 23, 2024

Natural gas hydrates, a promising clean energy resource, hold substantial potential. Porosity plays crucial role in hydrate systems by influencing formation processes and physical properties. To clarify the effects of porosity on elasticity, we examined methane its acoustic characteristics. Experiments were conducted sediment samples with porosities 23%, 32%, 37%. P- S-wave velocities measured to assess responses. Results show that as saturation increases, sample velocity also rises. However, high-porosity consistently exhibit lower compared low-porosity reach maximum saturation. This behavior is attributed rapid pore filling samples, which blocks flow pathways limits further formation. In contrast, sediments progresses more gradually, maintaining clearer channels resulting relatively higher Higher accelerates shift hydrates from cementing load-bearing morphologies. These findings underscore porosity’s significant influence provide insights into observed variations across different experimental conditions.

Language: Английский

Citations

0