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| DOI | 10.1016/j.advwatres.2019.103485 |
| Coupling between transport and geomechanics affects spreading and mixing during viscous fingering in deformable aquifers | |
| Tran M.; Jha B. | |
| 发表日期 | 2020 |
| ISSN | 0309-1708 |
| 卷号 | 136 |
| 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 |
| 关键词 | AquifersDeformationGeomechanicsHydrogeologySensitivity analysisSolute transportContaminant remediationContaminant transportFlow-deformation couplingsPermeability heterogeneityPoro-elasticitySpreading characteristicsStress-sensitive reservoirViscous fingeringMixingaquiferaquifer pollutiongeomechanicsmixingpollutant transportpollution incidenceporoelasticitysolute transport |
| 语种 | 英语 |
| 来源机构 | Advances in Water Resources |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/131871 |
| 推荐引用方式 GB/T 7714 | Tran M.,Jha B.. Coupling between transport and geomechanics affects spreading and mixing during viscous fingering in deformable aquifers[J]. Advances in Water Resources,2020,136. |
| APA | Tran M.,&Jha B..(2020).Coupling between transport and geomechanics affects spreading and mixing during viscous fingering in deformable aquifers.,136. |
| MLA | Tran M.,et al."Coupling between transport and geomechanics affects spreading and mixing during viscous fingering in deformable aquifers".136(2020). |
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