气候变化领域集成服务门户(CCPortal): Experimental Insights Into the Interplay Between Buoyancy, Convection, and Dissolution Reaction

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DOI	10.1029/2020JB020854
	Experimental Insights Into the Interplay Between Buoyancy, Convection, and Dissolution Reaction
	Ahoulou A.W.A.; Tinet A.-J.; Oltéan C.; Golfier F.
发表日期	2020
ISSN	21699313
卷号	125 期号:11
英文摘要	Predicting the instabilities that occur during the chemical reaction between a percolating fluid and a soluble rock leading to the development of macroscopic channels called wormholes is a key for understanding many geological processes. Their shape and their spatial distribution depend on two dimensionless numbers, namely Damköhler (Da) and Péclet (Pe) numbers. Although the dissolution phenomenon has been extensively studied both in the context of acid stimulation of oil wells in carbonate rocks and carbon capture and storage, few works have focused on the influence of the physical properties of fluids on wormhole patterns. Consequently, through interpretation of images acquired during the injection of pure water into a 2-D reconstituted salt massif and considering different configurations of injection, we illustrate the buoyancy effects on wormhole formation. Contrarily to observation in fractures, experimental results suggest that dissolution regimes can still be described by the classical dimensionless numbers Da and Pe. As for the regime diagram, it remains practically unchanged for strong Péclet and weak Damköhler and undergoes a slowdown of the propagation of the dissolution front when the number of Richardson's increases. Analysis of morphological descriptors such as area, interface, and tortuosity shows that density contrast has an influence on intermediate- to high-Richardson dissolution regimes that may be explained by the existence of buoyancy effects. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	buoyancy; density contrast; Hele-Shaw cell; salt dissolution; wormholing regimes
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/187501
作者单位	Université de Lorraine, CNRS, GeoRessources, Nancy, France
推荐引用方式 GB/T 7714	Ahoulou A.W.A.,Tinet A.-J.,Oltéan C.,et al. Experimental Insights Into the Interplay Between Buoyancy, Convection, and Dissolution Reaction[J],2020,125(11).
APA	Ahoulou A.W.A.,Tinet A.-J.,Oltéan C.,&Golfier F..(2020).Experimental Insights Into the Interplay Between Buoyancy, Convection, and Dissolution Reaction.Journal of Geophysical Research: Solid Earth,125(11).
MLA	Ahoulou A.W.A.,et al."Experimental Insights Into the Interplay Between Buoyancy, Convection, and Dissolution Reaction".Journal of Geophysical Research: Solid Earth 125.11(2020).