Tomografia Elétrica Entre Poços na Investigação Ambiental de Sítios Contaminados por Hidrocarbonetos e Água Salinizada

The usual electrical multielectrode methods can be replaced by the cross-hole multielectrode one (borehole electrical tomography), with advantages in terms of apparent resistivity measurement precision, depth of investigation and space restriction areas with a large amount of surface interferences. This paper shows the applications of the electrical borehole tomography considering three different sites: the first one representing a free phase hydrocarbon resistive contamination, the second one representing a dissolved hydrocarbon phase conductive contamination and the third one presenting a salt water conductive contamination. The geophysical result was correlated with well logging, geochemistry and hydrochemistry analysis and can confirm this methodology as a powerful tool when applied to the environmental evaluation.