spontaneous-potential well logging

spontaneous-potential well logging

[spän′tā·nē·əs pə′ten·chəl ¦wel ‚läg·iŋ]
(engineering)
The recording of the natural electrochemical and electrokinetic potential between two electrodes, one above the other, lowered into a drill hole; used to detect permeable beds and their boundaries. Also known as SP logging.
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