Method and apparatus for logging and displaying a two dimensional image of spontaneous potential
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United States of America Patent
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-
Apr 16, 1991
Grant Date -
N/A
app pub date -
Nov 1, 1989
filing date -
Nov 1, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method and apparatus for obtaining fine detail of spontaneous potential (SP) along a bore-hole wall in the earth, in connection with exploration for petrochemical deposits. A laterally-extending array of SP-sensing electrodes is mounted on an insulating pad, each slightly below the pad surface, and the pad is moved along and against the bore-hole wall while the SP's at the electronics are sampled and sent to up-hole electrodes for processing. The processed electrode samples are used to form a two-dimensional visually-observable image of the segment of the bore-hole wall swept over by the electrodes on the pad.
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