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DOI	10.2516/stet/2024012
	Mechanical behaviour and microstructure of methane hydrate-bearing sandy sediment observed at various spatial scales
	Le, Thi Xiu; Bornert, Michel; Aimedieu, Patrick; Broseta, Daniel; Chabot, Baptiste; King, Andrew; Tang, Anh Minh
发表日期	2024
EISSN	2804-7699
起始页码	79
卷号	79
英文摘要	Methane hydrates (MHs) are considered an alternative energy resource but also a potential source of geo-hazards and climate change. The physical/mechanical properties of gas hydrate-bearing sandy sediments are strongly dependent on the distribution of hydrates within the pore space. The purpose of this study is to investigate morphologies and pore-habits of MHs formed in sandy sediments by means of experiments that probe a wide range of scales, from the pore scale - using Synchrotron X-Ray Computed Tomography (SXRCT) and optical microscopy - to the core scale, through mechanical property measurements. The same synthetic sands are used, in which MHs are generated successively under excess gas and excess water conditions. At the macroscopic (core) scale, MH pore habits are inferred by comparing the measured sonic wave velocities to velocities calculated from rock physics models and further assessed via triaxial compression tests. Furthermore, Magnetic Resonance Imaging is used to investigate the kinetics of MH formation and distribution along the core height. The pore habits and MH morphologies are directly visualized at the pore (grain) scale by SXRCT and, with still better spatial and temporal resolution, by transmission optical microscopy, revealing some more complex morphologies than in the hydrate pore habits commonly admitted.
英文关键词	Gas hydrates; Sediment; Microstructure; Mechanical properties
语种	英语
WOS研究方向	Energy & Fuels ; Engineering
WOS类目	Energy & Fuels ; Engineering, Chemical ; Engineering, Petroleum
WOS记录号	WOS:001180850700002
来源期刊	SCIENCE AND TECHNOLOGY FOR ENERGY TRANSITION
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/294835
作者单位	Ecole des Ponts ParisTech; Centre National de la Recherche Scientifique (CNRS); Universite Gustave-Eiffel; Universite de Pau et des Pays de l'Adour; Centre National de la Recherche Scientifique (CNRS); SOLEIL Synchrotron
推荐引用方式 GB/T 7714	Le, Thi Xiu,Bornert, Michel,Aimedieu, Patrick,et al. Mechanical behaviour and microstructure of methane hydrate-bearing sandy sediment observed at various spatial scales[J],2024,79.
APA	Le, Thi Xiu.,Bornert, Michel.,Aimedieu, Patrick.,Broseta, Daniel.,Chabot, Baptiste.,...&Tang, Anh Minh.(2024).Mechanical behaviour and microstructure of methane hydrate-bearing sandy sediment observed at various spatial scales.SCIENCE AND TECHNOLOGY FOR ENERGY TRANSITION,79.
MLA	Le, Thi Xiu,et al."Mechanical behaviour and microstructure of methane hydrate-bearing sandy sediment observed at various spatial scales".SCIENCE AND TECHNOLOGY FOR ENERGY TRANSITION 79(2024).