Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent
1983-04-06
1984-09-18
Strecker, Gerard R.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
73152, 324323, G01V 328, G01V 1100
Patent
active
044726848
ABSTRACT:
A sonde for induction logging of boreholes comprises a zero mutual inductance transmitter-receiver coil array comprising at least two coil groups that are time or frequency multiplexed. Each group comprises a coil array which is asymmetric and the coil array of one group are the mirror image of the coil array of the other group. The response of the sonde is obtained by combining the responses detected in several groups of receivers at different depths. Combination sondes, including those capable of performing both induction and sonic logging may be constructed.
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Schlumberger Technology Corporation
Strecker Gerard R.
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