Electromagnetic wave logging dipmeter

Details Electromagnetic wave logging dipmeter Electromagnetic wave logging dipmeter

1981-03-16

1983-12-20

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

G01V 330

Patent

active

044220430

ABSTRACT:
An improvement to dipmeter logs has very closely spaced radio frequency sensor coils mounted in pairs in each of the formation contacting pads. A transmitter mounted in a sonde emits the radio frequency energy, such as in the range of from two to one hundred megahertz. The phase difference in radio frequency signals between receiver coil pairs in each pad is measured, providing improved data resolution for computing formation dip, and making possible dip measurements in wells drilled with oil base mud or air (invert type muds).

REFERENCES:
patent: 2963641 (1960-12-01), Nanz
patent: 3944910 (1976-03-01), Rau
patent: 4019126 (1977-04-01), Meador
patent: 4107598 (1978-08-01), Meador et al.
patent: 4130793 (1978-12-01), Bridges et al.
patent: 4251773 (1981-02-01), Cailliau et al.
patent: 4383220 (1983-05-01), Baldwin

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