GSTDTAP  > 资源环境科学
DOI10.1029/2019WR026060
Signature of Geochemistry on Density-Driven CO2 Mixing in Sandstone Aquifers
Erfani, Hamidreza; Babaei, Masoud; Niasar, Vahid
2020-03-01
发表期刊WATER RESOURCES RESEARCH
ISSN0043-1397
EISSN1944-7973
出版年2020
卷号56期号:3
文章类型Article
语种英语
国家England
英文摘要

Density-driven mixing resulting from CO2 injection into aquifers leads to the CO2 entrapment mechanism of solubility trapping. Crucially, the coupled flow-geochemistry and effects of geochemistry on density-driven mixing process for "sandstone rocks" have not been adequately addressed. Often, there are conflicting remarks in the literature as to whether geochemistry promotes or undermines dissolution-driven convection in sandstone aquifers. Against this backdrop, we simulate density-driven mixing in sandstone aquifers by developing a 2-D modified stream function formulation for multicomponent reactive convective-diffusive CO2 mixing. Two different cases corresponding to laboratory and field scales are studied to investigate the effect of rock-fluid interaction on density-driven mixing and the role of mineralization in carbon storage over the project life time. A complex sandstone mineralogical assemblage is considered, and solid-phase reactions are assumed to be kinetic to study the length- and time-scale dependency of the geochemistry effects. The study revealed nonuniform impact of rock-fluid and fluid-fluid interaction in early- and late-time stages of the process. The results show that for moderate Rayleigh (Ra) numbers, rock-fluid interactions adversely affect solubility trapping while improving the total carbon captured through mineral trapping. Simulation results in the range of 1,500 < Ra < 55,000 in the field-scale model showed more pronounced impact of geochemistry for higher Ra numbers, as geochemistry stimulates the convective instabilities and improves the total sequestered carbon. This study gives new insights into the effect of rock-fluid interactions on density-driven mixing and solubility trapping in sandstone aquifers to improve estimation of the carbon storage capacity in deep saline aquifers.


领域资源环境
收录类别SCI-E
WOS记录号WOS:000538000800024
WOS关键词ENHANCED OIL-RECOVERY ; REACTIVE TRANSPORT ; CARBON-DIOXIDE ; POROUS-MEDIA ; GEOLOGICAL STORAGE ; NATURAL-CONVECTION ; DISSOLUTION PATTERNS ; CAP-ROCK ; SEQUESTRATION ; CAPTURE
WOS类目Environmental Sciences ; Limnology ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
引用统计
被引频次:21[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/280594
专题资源环境科学
作者单位Univ Manchester, Dept Chem Engn & Analyt Sci, Manchester, Lancs, England
推荐引用方式
GB/T 7714
Erfani, Hamidreza,Babaei, Masoud,Niasar, Vahid. Signature of Geochemistry on Density-Driven CO2 Mixing in Sandstone Aquifers[J]. WATER RESOURCES RESEARCH,2020,56(3).
APA Erfani, Hamidreza,Babaei, Masoud,&Niasar, Vahid.(2020).Signature of Geochemistry on Density-Driven CO2 Mixing in Sandstone Aquifers.WATER RESOURCES RESEARCH,56(3).
MLA Erfani, Hamidreza,et al."Signature of Geochemistry on Density-Driven CO2 Mixing in Sandstone Aquifers".WATER RESOURCES RESEARCH 56.3(2020).
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