Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Patent
1983-07-06
1987-09-08
Strecker, Gerard R.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Using electrode arrays, circuits, structure, or supports
324347, G01V 320
Patent
active
046927077
ABSTRACT:
A wall engaging pad for well logging comprises a face portion of electrically conductive material within which are disposed three or more current electrodes. The survey current emitted from the current electrodes is differently focussed. A suitable current return is furnished. A plurality of individual measurements having respective graduated depths of investigation are obtained and suitably processed to yield resistivity measurements. The body of the sonde carrying the pad may be used to enhance the focussing of the survey current.
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Gouilloud Michel
Locke Stanley
Borst Stephen L.
Carroll David H.
Edmonds Warren S.
Lee Peter Y.
Schlumberger Technology Corporation
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