气候变化领域集成服务门户(CCPortal): Pore Habit of Gas in Gassy Sediments

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DOI	10.1029/2020JB021511
	Pore Habit of Gas in Gassy Sediments
	Terzariol M.; Sultan N.; Apprioual R.; Garziglia S.
发表日期	2021
ISSN	21699313
卷号	126 期号:5
英文摘要	Gas bubbles are widespread in seafloors and lakebeds and typically found in shallow and fine-grained sediments. Sediment properties control gas nucleation and gas migration. Gas migration and pathways have been studied mostly in clean coarse particles or fine-grained matrices. Nevertheless, both cases show very distinct geo-behaviors. Pore habit is defined by the counteracting effects of effective stress and pore-throat-dependent capillary pressure. In this article, we explore gas nucleation by CO2 gas exsolution and its consequent gas-driven fractures (open-mode discontinuities) or pore invasion in binary sediments as a function of fines content (FC). We conducted physical test analogies for different FC subjected to gas exsolution. Our results highlight that the pore habit of gas in gassy sediments depends on its capability to invade a neighboring pore (capillarity) and burial depth (effective stress). We show that the load dominant fraction in binary soils can be used to estimate the dominant pore throat size. We then proposed a robust methodology to predict the pore habit of gassy sediments from its properties as defined in recent developments in soil behavior and characterization. Finally, we applied it to a real case offshore Vancouver Island. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Degassing; fracture; gas exsolution; gassy sediments; pore invasive; revised soil classification
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187118
作者单位	REM-GM, IFREMER, Plouzane, France
推荐引用方式 GB/T 7714	Terzariol M.,Sultan N.,Apprioual R.,et al. Pore Habit of Gas in Gassy Sediments[J],2021,126(5).
APA	Terzariol M.,Sultan N.,Apprioual R.,&Garziglia S..(2021).Pore Habit of Gas in Gassy Sediments.Journal of Geophysical Research: Solid Earth,126(5).
MLA	Terzariol M.,et al."Pore Habit of Gas in Gassy Sediments".Journal of Geophysical Research: Solid Earth 126.5(2021).