electromagnetic logging

electromagnetic logging

[i¦lek·trō·mag′ned·ik ′läg·iŋ]
(engineering)
A method of well logging in which a transmitting coil sets up an alternating electromagnetic field, and a receiver coil, placed in the drill hole above the transmitter coil, measures the secondary electromagnetic field induced by the resulting eddy currents within the formation. Also known as electromagnetic well logging.
References in periodicals archive ?
The paper discusses the use of circuit simulation to realize physical Duffing oscillator performance on the azimuth electromagnetic logging weak signal detections.
The traditional Duffing equation applies only to low frequency ranges while electromagnetic logging coil waves use high frequencies such as 2 MHz, 1 MHz, and 400 kHz.
The Duffing oscillator can be set according to the excitation frequency of the transmitting coil to detect the electromagnetic logging response signal and the driving force signal frequency.
Cased hole electromagnetic logging theory and parameter optimization.
Theory study for transient electromagnetic logging: electromagnetic wave.

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