Modeling impacts of subscale heterogeneities on dispersive solute transport in subsurface systems

Journal of Contaminant Hydrology
Vikrant Vishal, Juliana Y Leung

Abstract

Previous works in the literature demonstrated that dispersion increases with heterogeneities and travel distance in heterogeneous reservoirs. However, it remains challenging to quantify the effects of subscale heterogeneities on dispersion. Scale-up of input dispersivity and other reservoir attributes to the transport modeling scale should account for subscale heterogeneity and its variability. A method is proposed to quantify the uncertainties in reservoir attributes and dispersivity introduced by scale-up. A random walk particle tracking (RWPT) method, which is not prone to numerical dispersion, is used for transport modeling. First, to scale-up rock properties including porosity and permeability, volume variance at the transport modeling scale is computed corresponding to a given spatial correlation model; numerous sets of "conditioning data" are sampled from probability distributions whose mean is the block average of the actual measure values and the variance is the variance of block mean. Stochastic simulations are subsequently performed to generate multiple realizations at the transport modeling scale. Next, multiple sub-grid geostatistical realizations depicting detailed fine-scale heterogeneities and of the same physic...Continue Reading

References

May 10, 2002·Journal of Contaminant Hydrology·Jack F Schijven, Jirí Simůnek
Jun 20, 2003·Journal of Contaminant Hydrology·Melissa Levy, Brian Berkowitz
Jul 15, 2006·Journal of Contaminant Hydrology·Peter SalamonJ Jaime Gómez-Hernández
Jul 16, 2010·Journal of Contaminant Hydrology·D Fernàndez-Garcia, X Sanchez-Vila
Nov 14, 2013·Water Resources Research·Branko BijeljicMartin J Blunt

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Citations

Aug 9, 2016·Journal of Contaminant Hydrology·Juliana Y Leung, Sanjay Srinivasan

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