Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Patent
1985-01-10
1987-04-21
Strecker, Gerard R.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Using electrode arrays, circuits, structure, or supports
324371, G01V 324
Patent
active
046599932
ABSTRACT:
An apparatus and a method are disclosed wherein simultaneous electrical well logs can be made with a plurality of focused currents emitted from a plurality of electrodes located along a single equipotential surface of a housing. The focused currents are generated in response to a single voltage signal from a single power supply connected between the housing and a single current return electrode. A voltage reference is located on a cable which suspends the housing and the current return electrode in a well borehole, and a voltage detection circuit detects a voltage offset between the voltage reference and the housing.
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Pp. 207-225 of Petroleum Engineering-Drilling and Well Completions, Carl Gatlin (1960).
Gilbert III E. Harrison
Halliburton Company
Strecker Gerard R.
Walkowski Joseph A.
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