Three-dimensional detection system for detecting fractures and t

Details Three-dimensional detection system for detecting fractures and t Three-dimensional detection system for detecting fractures and t

1991-06-28

1992-09-29

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

By magnetic means

73155, 166254, 324325, 324339, G01V 326, G01V 340, E21B 4710

Patent

active

051516586

ABSTRACT:
A three-dimensional detection system for detecting fractures and their distributions in the earth crust utilizing an artificial magnetic field which comprises: a magnetic particle tracer being injected into the fractures of the earth crust, having high magnetic permeability and specific weight of the same degree with a fluid substance existing in the fractures; and inner borehole magnetic field detecting devices being hung in boreholes which are dug in the earth crust and having transmitters and/or receivers operating at a predetermined frequency.

REFERENCES:
patent: 3187252 (1965-06-01), Hungerford
patent: 4222444 (1980-09-01), Hamilton
patent: 4253063 (1981-02-01), Tweeton
patent: 4264862 (1981-04-01), Koelle et al.
patent: 4491796 (1985-01-01), Smith
patent: 4875015 (1989-10-01), Ward

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