DOI: 10.1016/j.advwatres.2019.103485
论文题名: Coupling between transport and geomechanics affects spreading and mixing during viscous fingering in deformable aquifers
作者: Tran M. ; Jha B.
刊名: Advances in Water Resources
ISSN: 3091708
出版年: 2020
卷: 136 语种: 英语
英文关键词: Contaminant transport
; Geomechanics
; Mixing
; Poroelasticity
; Viscous fingering
Scopus关键词: Aquifers
; Deformation
; Geomechanics
; Hydrogeology
; Sensitivity analysis
; Solute transport
; Contaminant remediation
; Contaminant transport
; Flow-deformation couplings
; Permeability heterogeneity
; Poro-elasticity
; Spreading characteristics
; Stress-sensitive reservoir
; Viscous fingering
; Mixing
; aquifer
; aquifer pollution
; geomechanics
; mixing
; pollutant transport
; pollution incidence
; poroelasticity
; solute transport
英文摘要: We investigate the influence of poroelasticity on solute transport processes during viscously unstable flows in a deformable aquifer. We hypothesize that viscous fingering-induced fluctuations in the flow field can increase the strength of coupling between poroelastic stresses and mixing and spreading characteristics of the solute slug. To test the hypothesis, we develop a coupled flow, transport and geomechanics framework to simulate spreading, mixing and deformation mechanisms during viscous fingering in a stress-sensitive aquifer. We show quantitatively that concentration-dependent fluid mobility affects the pressure and effective stress fields, and deformation-driven changes in porosity affects advective and diffusive fluxes. We perform a sensitivity analysis to evaluate the dependence of global transport characteristics—the solute breakthrough time, breakthrough curve and the degree of mixing—on the strength of flow-deformation coupling defined in terms of poroelastic moduli. Results are obtained for different magnitudes of the Peclet number, solute viscosity contrast, Biot coefficient, rock bulk modulus, fluid compressibility, and permeability heterogeneity. We find that, in presence of less consolidated formations, softer rocks, or more compressible fluids, the injected solute breaks through earlier and mixes with the resident fluid better. Our results provide important insights for modeling hydrodynamically unstable contaminant remediation and fluid injection processes in stress-sensitive reservoirs. © 2019 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159907
Appears in Collections: 气候变化与战略
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作者单位: Mork Family Department of Chemical Engineering & Materials Science, University of Southern California, Los Angeles, CA, United States
Recommended Citation:
Tran M.,Jha B.. Coupling between transport and geomechanics affects spreading and mixing during viscous fingering in deformable aquifers[J]. Advances in Water Resources,2020-01-01,136