Array Induction Log (EAIL) The Array Induction Log (EAIL), which is based on electromagnetic working principle, is use for investigation in borehole with oil-base mud, water-base mud or air. The coil array mandrel consists of 1 Transmitter Coil and 7 Receiver Coils.  The EAIL’s Transmitter Coil sends rectangular electromagnetic waves which generate stratum eddy currents, and the eddy currents will create an inductive voltage in the receiver coils. The processed signal will be sent to the surface system where the FFT, skin effect correction, borehole correction, software focusing, adaptive filtering, resolution matching are done. The EAIL is able to simultaneously output resistivity curves with six radial depth investigations and three vertical resolutions. The EAIL uses an SP Electrode for Spontaneous Potential measurement.

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