2D Optimisation of Electrode Arrays for Borehole Surveys

An application of a new approach of 2D optimisation of electrode configurations is presented for borehole and surface-to-borehole surveys. The applied optimisation algorithm includes the sensitivities of the data and search for arrays that maximize the survey resolution. The resulting optimised data set has a practical size (≤ 7.5% of the comprehensive set) but almost the same resolution. Two applications to a resistive CO2 plume (of varying thicknesses and saturations) sequestrated in a conductive reservoir and resistive/conductive root zone in sandy soils have been presented as a function different configurations and inversion setups here and in Petersen and Hagrey (2009).