Method and device with adjustable focusing for measuring the ele

Details Method and device with adjustable focusing for measuring the ele Method and device with adjustable focusing for measuring the ele

1980-08-15

1983-10-25

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

Using electrode arrays, circuits, structure, or supports

G01V 324

Patent

active

044121806

ABSTRACT:
The method of the invention comprises determining the variation of the electric potential on both sides of a central electrode in a borehole, detecting the two levels of the borehole where the potential gradient is zero, and measuring the electric resistivity of the geological formation between these two levels.

REFERENCES:
patent: 2803796 (1957-08-01), Schuster
patent: 2824279 (1958-02-01), Ferre et al.
patent: 2880389 (1959-03-01), Ferre et al.
patent: 2925551 (1960-02-01), Segesman
patent: 3096477 (1963-07-01), Smith et al.
patent: 3262050 (1966-07-01), Threadgold et al.
patent: 3365658 (1968-01-01), Birdwell
patent: 3452269 (1969-06-01), Welz
patent: 3660755 (1972-05-01), Janssen
patent: 3760260 (1973-09-01), Schuster

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