Summary We report a detailed experimental and theoretical study of the electromagnetic propagation tool (EPT™) in homogeneous and layered media. In this study, we measured the tool response in a number of homogeneous media, the standoff response in three formations, and the field maps for the magnetic field components parallel to the tool pad. We compared the experimental results to four theoretical models of different complexities. The best agreement is obtained with the model that takes into account the dominant geometric effects of EPT structure and the effect of the mutual coupling between the different slots. This study of EPT response is limited to relatively fresh fluids.
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Safinya et al. (1987) studied this question.
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