Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent
1988-05-19
1990-01-09
Strecker, Gerard R.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
324338, G01V 330, G01V 338
Patent
active
048930849
ABSTRACT:
A method and apparatus for dielectric investigation in formations adjacent a well borehole is set forth. In the preferred and illustrated embodiment, a microwave transmitter forms and output signal which is transmitted by a transmitter antenna in contact with the sidewall, the propagation into the formation from the transmitter antenna, the signal being received at a receiving antenna, and further including means for making measurements of amplitude and phase angle. Such measurements are used to determine an equivalent circuit representative of the formation between the transmitter antenna and receiver antenna; the equivalent circuit encodes valuations of resistivity, dielectric constant and magnetic permeability of the formation material. Multiple measurements can be made in a given formation, and the sonde can be moved steadily or periodically to make measurements at selected locations. Formation electrical parameters in adjacent formations can then be determined.
REFERENCES:
patent: 4052662 (1977-10-01), Rau
patent: 4130793 (1978-12-01), Bridges et al.
patent: 4338567 (1982-07-01), Coates
patent: 4547733 (1985-10-01), Thoraval
patent: 4581584 (1986-04-01), Baldwin
patent: 4712070 (1987-12-01), Clark et al.
patent: 4766384 (1988-08-01), Kleinberg et al.
Beard William J.
Halliburton Logging Services Inc.
Strecker Gerard R.
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