In-Situ Characterization of Residual NAPL Distribution Using Streamline-Based Inversion of Partitioning Tracer Tests
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A streamline-based inversion method for partitioning tracer response to estimate the spatial distribution of non-aqueous phase liquid (NAPL) saturation in the subsurface is presented. The method relies on an analytic sensitivity computation method that yields the sensitivities of the partitioning tracer response to subsurface parameters such as porosity, permeability and NAPL saturation in a single streamline simulation. Efficient techniques from geophysical inversion can then be used to match the field tracer response and estimate subsurface parameters. The non-uniqueness in the solution is addressed using regularization techniques and/or prior information.
author list (cited authors)
Yoon, S., Barman, I., Datta-Gupta, A., & Pope, G. A.