Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Patent
1988-09-23
1989-08-29
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Using electrode arrays, circuits, structure, or supports
324347, G01V 308
Patent
active
048620890
ABSTRACT:
The present invention relates generally to a method of geophysical exploration and more particularly to a novel method of magnetotelluric exploration. In one embodiment, a series of continuous electric dipole measurements of one component of the earth's electric field are obtained along a zigzag line. Concurrently, at least two components of the earth's magnetic field are obtained in the vicinity of the zigzag line. Each electric dipole measurement of the earth's electric field comprise measures of the potential difference between electrodes spaced along the zigzag line in which the included angle between adjacent pairs of electric dipole measurements is less than 180.degree.. Preferably, the included angle between adjacent electric dipole measurements is between 90.degree. and 150.degree..
REFERENCES:
patent: 4286218 (1981-08-01), Bloomquist et al.
patent: 4591791 (1986-05-01), Bostick, Jr.
patent: 4757262 (1988-07-01), Bostick, Jr.
"Basic Theory of the Magneto-Telluric Method of Geophysical Prospecting", Cagniard, Geophysics vol. 18, p. 605 (1953).
"Electromagnetic Array Profiling", Bostick, 50th Annual Meeting, Society of Exploration Geophysicists, pp. 60-61, (1986).
Amoco Corporation
Eisenzopf Reinhard J.
Snow Walter E.
Stanley Timothy D.
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