Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent
1992-07-22
1995-02-14
Wieder, Kenneth A.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
324341, G01V 318, G01V 312
Patent
active
053898818
ABSTRACT:
An electromagnetic wave propagation well logging system for measuring dielectric constant and/or formation resistivity (conductivity) includes three transmitters and a pair of receivers. The receiver pair is connected to circuitry that measures the amplitude ratio between the receivers, as well as the phase angle difference between the receivers. Signals representative of the detected amplitude ratio and of the detected phase angle difference are combined in such a manner as to make the depth of investigation controllable. Methods are also disclosed for maintaining a common depth of investigation as the well logging instrument traverses the earth borehole.
REFERENCES:
patent: 4009434 (1977-02-01), McKinlay et al.
patent: 4012689 (1977-03-01), Cox et al.
patent: 4052662 (1977-10-01), Rau
patent: 4107598 (1978-08-01), Meador et al.
patent: 4209747 (1980-06-01), Huchital
patent: 4553097 (1985-11-01), Clark
patent: 4785247 (1988-11-01), Meador et al.
patent: 4899112 (1990-02-01), Clark et al.
patent: 5278507 (1994-01-01), Bartel et al.
SPE 12167, P. F. Rodney, The Electromagnetic Wave Resistivity MWD Tool, Oct. 1983, 16 pgs.
Bittar Michael S.
Rodney Paul F.
Baroid Technology Inc.
Patidar Jay M.
Wieder Kenneth A.
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