Pulsed electromagnetic dipmeter method and apparatus employing c

Details Pulsed electromagnetic dipmeter method and apparatus employing c Pulsed electromagnetic dipmeter method and apparatus employing c

1989-09-14

1992-05-19

Snow, Walter E.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

G01V 328

Patent

active

051151987

ABSTRACT:
The transmitter and receiver coils (35,40) in an electromagnetic dipmeter (10) are separated by a finite spacing (L) to remove borehole positional effects. Dip and strike are then determined with the same methods available for zero spacing devices by pulsing the transmitter signal.

REFERENCES:
patent: 3609521 (1971-09-01), Desbrendes
patent: 3808520 (1974-04-01), Runge
patent: 4302723 (1981-11-01), Moran
patent: 4360777 (1982-11-01), Segesman
patent: 4583045 (1986-04-01), Gianzero
J. H. Moran & S. Gianzero, "Electrical Anisotropy: Its Effect on Well Logs", Developments in Geophysical Exploration Methods, vol. 3, Chapter 6, Applied Science Publishers, 1982, pp. 195-238.
Moran, J. H., Gianzero, S., "Effects of formation anisotropy on resistivity logging measurements", Geophysics, vol. 44, No. 7, Jul. 1979, pp. 1266-1286.

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