Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Patent
1989-11-01
1991-04-16
Strecker, Gerard R.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Using electrode arrays, circuits, structure, or supports
324367, G01V 326, G01V 334
Patent
active
050086251
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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Free Albert L.
Schlumberger Technology Corporation
Strecker Gerard R.
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