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.
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