Convective dissolution of CO2 in saline aquifers: Progress in modeling and experiments
Convective dissolution of CO2 in saline aquifers: Progress in modeling and experiments
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DOI：
10.1016/j.ijggc.2015.04.003
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发表时间：
2015-09-01
影响因子：
3.9
通讯作者：
Ennis-King, Jonathan
中科院分区：
文献类型：
--
作者：
Emami-Meybodi, Hamid;Hassanzadeh, Hassan;Ennis-King, Jonathan
二氧化碳（CO2）在深层咸水层中的溶解被认为是地下储存大量CO2的基本机制之一。二氧化碳溶解的一个基本物理效应是，在与浮力的自由相二氧化碳羽流接触的层中，水密度略有增加。在特定条件下，这可能导致重力不稳定和自由对流的开始，通过使CO2与更大体积的含水层水接触，显著加速自由相CO2的溶解。利用工程方法，如在CO2羽流顶部注水，提高CO2的溶解也是可行的。本文综述了深层含盐含水层CO2溶解物理方面的模拟和实验观测进展。我们回顾了已发表的关于CO2在地层水中溶解的物理效应的研究成果，该过程可以自然加速的条件，例如通过自由对流或使用工程方法，以及CO2溶解对CO2储存的影响。最后，讨论了需要进一步研究的领域。(C) 2015 Elsevier Ltd.版权所有。
The dissolution of carbon dioxide (CO2) in deep saline aquifer water is recognized as one of the fundamental mechanisms in the subsurface for storing significant quantities of CO2. One fundamental physical effect of CO2 dissolution is the slight increase in water density in the layer in contact with the buoyant free-phase CO2 plume. Under specific conditions, this may lead to gravitational instability and the onset of free convection, significantly accelerating the dissolution of the free-phase CO2 by bringing CO2 in contact with a larger volume of aquifer water. It is also feasible to enhance CO2 dissolution using engineering methodologies such as injecting water on top of the plume of CO2. The objective of this review is to provide a perspective on the progress in modeling and experimental observations of physical aspects of CO2 dissolution in deep saline aquifers. We review the published research efforts concerning the physical effects of CO2 dissolution in formation water, the conditions under which process can be accelerated either naturally, such as by free convection, or by use of engineering methodologies, and the effects of CO2 dissolution on CO2 storage. Finally, we discuss areas in need of further research. (C) 2015 Elsevier Ltd. All rights reserved.