Method and apparatus for detecting subsurface anomalies

Details Method and apparatus for detecting subsurface anomalies Method and apparatus for detecting subsurface anomalies

1986-11-24

1989-05-30

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

Using electrode arrays, circuits, structure, or supports

324357, G01V 302

Patent

active

048354740

ABSTRACT:
A method and apparatus for collecting measurements on the surface of the earth in a form which can be processed to obtain enhanced resolution of subsurface resistivity anomalies in the earth's geologic structure. The system of the preferred embodiment utilizes many separately acquired voltage and current measurements on the earth's surface in a superposition analysis to "synthesize" the condition whereby the many separate measurements are acquired simultaneously to give useful advantages in improved depth of investigation commonly known as focused resistivity measurements.

REFERENCES:
patent: 2113749 (1938-04-01), Statham
patent: 3849722 (1974-11-01), Nilsson
patent: 4295096 (1981-10-01), Sternberg et al.
patent: 4467283 (1984-08-01), Owen et al.
Darilek et al, "Focussed Resistivity Method for Detecting Sub-surface Coal Mine Workings", Bureau of Mines, U.S. Dept. of Interior, Mar. 1986, pp. 1-103.

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