Inverse sequential simulation: A new approach for the characterization of hydraulic conductivities demonstrated on a non‐Gaussian field

2015/03/16 by Teng Xu, J. Jaime Gómez‐Hernández
Environmental Science · Engineering · Earth and Planetary Sciences · #Groundwater flow and contamination studies #Reservoir Engineering and Simulation Methods #Geophysical and Geoelectrical Methods

paper · doi:10.1002/2014wr016320

Abstract

Abstract Inverse sequential simulation (iSS) is a new inverse modeling approach for the characterization of hydraulic conductivity fields based on sequential simulation. It is described and demonstrated in a synthetic aquifer with non‐Gaussian spatial features, and compared against the normal‐score ensemble Kalman filter (NS‐EnKF). The new approach uses the sequential simulation paradigm to generate realizations borrowing from the ensemble Kalman filter the idea of using the experimental nonstationary cross‐covariance between conductivities and piezometric heads computed on an ensemble of realizations. The resulting approach is fully capable of retrieving the non‐Gaussian patterns of the reference field after conditioning on the piezometric heads with results comparable of those obtained by the NS‐EnKF.

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