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DOI | 10.1002/2017GL076374 |
Strength Estimation for Hydrate-Bearing Sediments From Direct Shear Tests of Hydrate-Bearing Sand and Silt | |
Liu, Zhichao1,2; Dai, Sheng2; Ning, Fulong1,3; Peng, Li1; Wei, Houzhen4; Wei, Changfu4 | |
2018-01-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:2页码:715-723 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Safe and economic methane gas production, as well as the replacement of methane while sequestering carbon in natural hydrate deposits, requires enhanced geomechanical understanding of the strength and volume responses of hydrate-bearing sediments during shear. This study employs a custom-made apparatus to investigate the mechanical and volumetric behaviors of carbon dioxide hydrate-bearing sediments subjected to direct shear. The results show that both peak and residual strengths increase with increased hydrate saturation and vertical stress. Hydrate contributes mainly the cohesion and dilatancy constraint to the peak strength of hydrate-bearing sediments. The postpeak strength reduction is more evident and brittle in specimens with higher hydrate saturation and under lower stress. Significant strength reduction after shear failure is expected in silty sediments with high hydrate saturation S-h >= 0.65. Hydrate contribution to the residual strength is mainly by increasing cohesion at low hydrate saturation and friction at high hydrate saturation. Stress state and hydrate saturation are dominating both the stiffness and the strength of hydrate-bearing sediments; thus, a wave velocity-based peak strength prediction model is proposed and validated, which allows for precise estimation of the shear strength of hydrate-bearing sediments through acoustic logging data. This method is advantageous to geomechanical simulators, particularly when the experimental strength data of natural samples are not available. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425514300027 |
WOS关键词 | PRODUCTION TEST-SITE ; GAS-HYDRATE ; MECHANICAL-PROPERTIES ; SEISMIC VELOCITIES ; METHANE ; BEHAVIOR ; ENERGY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27076 |
专题 | 气候变化 |
作者单位 | 1.China Univ Geosci, Fac Engn, Wuhan, Hubei, Peoples R China; 2.Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA; 3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China; 4.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan, Hubei, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Zhichao,Dai, Sheng,Ning, Fulong,et al. Strength Estimation for Hydrate-Bearing Sediments From Direct Shear Tests of Hydrate-Bearing Sand and Silt[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(2):715-723. |
APA | Liu, Zhichao,Dai, Sheng,Ning, Fulong,Peng, Li,Wei, Houzhen,&Wei, Changfu.(2018).Strength Estimation for Hydrate-Bearing Sediments From Direct Shear Tests of Hydrate-Bearing Sand and Silt.GEOPHYSICAL RESEARCH LETTERS,45(2),715-723. |
MLA | Liu, Zhichao,et al."Strength Estimation for Hydrate-Bearing Sediments From Direct Shear Tests of Hydrate-Bearing Sand and Silt".GEOPHYSICAL RESEARCH LETTERS 45.2(2018):715-723. |
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