气候变化领域集成服务门户(CCPortal): Pore-Scale Investigation Of Methane Hydrate-Bearing Sediments Under Triaxial Condition

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DOI	10.1029/2019GL086448
	Pore-Scale Investigation Of Methane Hydrate-Bearing Sediments Under Triaxial Condition
	Lei L.; Seol Y.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:5
英文摘要	Mechanical behavior of hydrate-bearing sediments is critical for well stability, reservoir deformation, and sea floor settlement during gas production. Current understanding on the mechanism of hydrate strengthening hosting sediments relies on conceptual models based on idealistic pore-scale assumptions. Yet pore-scale study is rare and limited to hydrate-bearing sediments formed with surrogate guest molecules rather than methane. We present for the first time pore-scale triaxial test results of methane hydrate-bearing sediments. Besides the traditional stress-strain relationship, we further explored (1) sand particle crushing and (2) pressure-temperature dependent strength variations and (3) creep of hydrate-bearing sediments. Results show that as hydrate enables the sand skeleton to bear additional loads, the potential of sand crushing upon hydrate dissociation also increases. Strength of hydrate-bearing sediments decreases as pressure-temperature condition approaches hydrate phase boundary. Hydrate-bearing sediments creep and heal with time. The new observations suggest additional complications to be considered during gas production. ©2020. American Geophysical Union. All Rights Reserved. This article has been contributed to by US Government employees and their work is in the public domain in the USA.
英文关键词	Bearings (machine parts); Creep; Crushing; Hydration; Methane; Sediments; Stress-strain curves; Hydrate bearing sediments; Mechanical behavior; Methane hydrates; Pore scale; triaxial; Gas hydrates; creep; crushing; floor; gas production; methane; pore space; seafloor; skeleton; stress-strain relationship; triaxial test
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170592
作者单位	National Energy Technology Laboratory, U.S. Department of Energy, Morgantown, WV, United States
推荐引用方式 GB/T 7714	Lei L.,Seol Y.. Pore-Scale Investigation Of Methane Hydrate-Bearing Sediments Under Triaxial Condition[J],2020,47(5).
APA	Lei L.,&Seol Y..(2020).Pore-Scale Investigation Of Methane Hydrate-Bearing Sediments Under Triaxial Condition.Geophysical Research Letters,47(5).
MLA	Lei L.,et al."Pore-Scale Investigation Of Methane Hydrate-Bearing Sediments Under Triaxial Condition".Geophysical Research Letters 47.5(2020).