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DOI | 10.1029/2019WR024944 |
Stress-Induced Anomalous Transport in Natural Fracture Networks | |
Kang, Peter K.1,2; Lei, Qinghua3; Dentz, Marco4; Juanes, Ruben5 | |
2019-05-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:5页码:4163-4185 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Switzerland; Spain |
英文摘要 | We investigate the effects of geological stress on fluid flow and tracer transport in natural fracture networks. We show the emergence of non-Fickian (anomalous) transport from the interplay among fracture network geometry, aperture heterogeneity, and geological stress. In this study, we extract the fracture network geometry from the geological map of an actual rock outcrop, and we simulate the geomechanical behavior of fractured rock using a hybrid finite-discrete element method. We analyze the impact of stress on the aperture distribution, fluid flow field, and tracer transport properties. Both stress magnitude and orientation have strong effects on the fracture aperture field, which in turn affects fluid flow and tracer transport through the system. We observe that stress anisotropy may cause significant shear dilation along long, curved fractures that are preferentially oriented to the stress loading. This, in turn, induces preferential flow paths and anomalous early arrival of tracers. An increase in stress magnitude enhances aperture heterogeneity by introducing more small apertures, which exacerbates late-time tailing. This effect is stronger when there is higher heterogeneity in the initial aperture field. To honor the flow field with strong preferential flow paths, we extend the Bernoulli Continuous Time Random Walk model to incorporate dual velocity correlation length scales. The proposed upscaled transport model captures anomalous transport through stressed fracture networks and agrees quantitatively with the high-fidelity numerical simulations. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000474848500031 |
WOS关键词 | FLUID-FLOW ; DEPENDENT PERMEABILITY ; SOLUTE TRANSPORT ; ROUGH FRACTURES ; ROCK FRACTURE ; POROUS-MEDIA ; FIELD DATA ; MODEL ; DISPERSION ; SHEAR |
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/183139 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Minnesota, Dept Earth Sci, Minneapolis, MN 55455 USA; 2.Univ Minnesota, St Anthony Falls Lab, Minneapolis, MN 55455 USA; 3.Swiss Fed Inst Technol, Dept Earth Sci, Zurich, Switzerland; 4.CSIC, Spanish Natl Res Council, Inst Environm Assessment & Water Res IDAEA, Barcelona, Spain; 5.MIT, Dept Civil & Environm Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA |
推荐引用方式 GB/T 7714 | Kang, Peter K.,Lei, Qinghua,Dentz, Marco,et al. Stress-Induced Anomalous Transport in Natural Fracture Networks[J]. WATER RESOURCES RESEARCH,2019,55(5):4163-4185. |
APA | Kang, Peter K.,Lei, Qinghua,Dentz, Marco,&Juanes, Ruben.(2019).Stress-Induced Anomalous Transport in Natural Fracture Networks.WATER RESOURCES RESEARCH,55(5),4163-4185. |
MLA | Kang, Peter K.,et al."Stress-Induced Anomalous Transport in Natural Fracture Networks".WATER RESOURCES RESEARCH 55.5(2019):4163-4185. |
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