Electric field analysis in the Earth considering attenuation of electromagnetic waves propagated in lossy media

It is pointed out that, in the field of oil well drilling, EM-MWD (electromagnetic measurement while drilling) offers many advantages. The EM-MWD system can transmit measured data from the well bottom to the surface at high speed using electromagnetic waves. Developing the EM-MWD technology requires analysis of the electric field around a drill string. A novel computer simulation method has been developed which considers attenuation of electromagnetic waves propagated in lossy media, the Earth, using features of analysis models. The simulation method can be applied to waveform simulation. This method has been verified by field experiments using a borehole of 500-m depth.<
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