GSTDTAP  > 资源环境科学
DOI10.1029/2019WR026112
Dynamic Pore-Scale Dissolution by CO2-Saturated Brine in Carbonates: Impact of Homogeneous Versus Fractured Versus Vuggy Pore Structure
Yang, Yongfei1,2; Li, Yingwen1,2; Yao, Jun1,2; Iglauer, Stefan3; Luquot, Linda4; Zhang, Kai1,2; Sun, Hai1,2; Zhang, Lei1,2; Song, Wenhui1,2; Wang, Zhiyu1,2
2020-04-01
发表期刊WATER RESOURCES RESEARCH
ISSN0043-1397
EISSN1944-7973
出版年2020
卷号56期号:4
文章类型Article
语种英语
国家Peoples R China; Australia; France
英文摘要

Limestone pore structure strongly influences dissolution and associated reactive transport. These effects are critical in limestone diagenesis and but also in engineering operations such as carbon capture and storage (CCS). However, detailed studies on how CO2-enriched (acidic) brine changes this pore structure at relevant reservoir storage conditions are very limited. Thus, to provide further quantitative information and more fundamental understanding about these key processes, we studied the dissolution patterns of a homogeneous, a fractured, and a vuggy limestone when flooded with CO2-saturated brine at representative storage conditions. The pore structured of these limestones showed drastically different responses to the acidic brine flood. As such, preferential channels surrounded by branched channels were formed in the homogeneous sample, while fractures became the main flow path in the fractured sample. In contrast, only one dominant channel formed in the vuggy sample, which resulted in a sharp permeability increase. These dissolution patterns reflect the associated Damkohler number, which significantly lower in the homogeneous, representing uniform dissolution. However, after injecting sufficient reactive fluid (1,000 PV), this uniform dissolution pattern transformed into a single preferential channel growth. Moreover, we conclude that increasing complexity of the pore geometry leads to more nonuniform dissolution. These dissolution patterns indicate the effect of initial pore structure on preferential channel growth and reaction transport. Our work provides key fundamental data for further quantifying limestone dissolution patterns in CCS, indicating that the CO2 injection may cause the reactivation of geological faults and damage around wellbore, thus aids in the implementation of industrial-scale CCS.


Key Points


The impact of limestone pore structure on reactive transport was analyzed experimentally and computationally The dissolution patterns of homogeneous, fractured, and vuggy carbonate rocks are quantified and discussed in detail Increasing complexity of the pore geometry leads to more nonuniform dissolution


英文关键词Carbonate dissolution pattern Carbon storage Pore-scale Micro-CT Permeability changes Pe -Da distribution
领域资源环境
收录类别SCI-E
WOS记录号WOS:000538987800025
WOS关键词X-RAY MICROTOMOGRAPHY ; REACTIVE TRANSPORT ; LIMESTONE DISSOLUTION ; MINERAL DISSOLUTION ; WORMHOLE FORMATION ; REACTION-RATES ; CO2 STORAGE ; FLOW ; POROSITY ; PERMEABILITY
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
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/280637
专题资源环境科学
作者单位1.China Univ Petr East China, Key Lab Unconvent Oil & Gas Dev, Minist Educ, Qingdao, Peoples R China;
2.China Univ Petr East China, Sch Petr Engn, Res Ctr Multiphase Flow Porous Media, Qingdao, Peoples R China;
3.Edith Cowan Univ, Sch Engn, Petr Engn Discipline, Joondalup, WA, Australia;
4.Univ Montpellier, CNRS, Geosci Montpellier Lab, Montpellier, France
推荐引用方式
GB/T 7714
Yang, Yongfei,Li, Yingwen,Yao, Jun,et al. Dynamic Pore-Scale Dissolution by CO2-Saturated Brine in Carbonates: Impact of Homogeneous Versus Fractured Versus Vuggy Pore Structure[J]. WATER RESOURCES RESEARCH,2020,56(4).
APA Yang, Yongfei.,Li, Yingwen.,Yao, Jun.,Iglauer, Stefan.,Luquot, Linda.,...&Wang, Zhiyu.(2020).Dynamic Pore-Scale Dissolution by CO2-Saturated Brine in Carbonates: Impact of Homogeneous Versus Fractured Versus Vuggy Pore Structure.WATER RESOURCES RESEARCH,56(4).
MLA Yang, Yongfei,et al."Dynamic Pore-Scale Dissolution by CO2-Saturated Brine in Carbonates: Impact of Homogeneous Versus Fractured Versus Vuggy Pore Structure".WATER RESOURCES RESEARCH 56.4(2020).
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