Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Patent
1988-03-04
1989-08-29
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Using electrode arrays, circuits, structure, or supports
324347, 250268, G01V 302, G01V 320
Patent
active
048620904
ABSTRACT:
In order to increase the angular field of observation of a logging sonde usable, in particular for dip metering, the sonde is equipped with measuring pads each comprising two independent flaps. The flaps of the same pad are hinged to a central element which is held permanently parallel to the axis of the sonde body, and they are applied against the wall of a borehole by blade springs. Each of the flaps carries an array of electrodes. The flaps of each of the measuring pads are circumferentially offset relative to each other so that the angular field of observation is increased without increasing the diameter of the sonde, once the pads have been retracted.
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Ekstrom et al., "Formation Imaging with Microelectrical Scanning Arrays", The Log Analyst, vol. 28, No. 3, pp. 294-306, May-Jun. 1987.
Tromelin Jacques
Vannier Daniel
Edmonds Warren S.
Eisenzopf Reinhard J.
Schlumberger Technology Corporation
Smith Keith G. W.
Tager Clifford L.
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