Apparatus for direct airborne electromagnetic prospecting of hyd

Details Apparatus for direct airborne electromagnetic prospecting of hyd Apparatus for direct airborne electromagnetic prospecting of hyd

1985-01-17

1986-12-09

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

By aerial survey

324334, G01V 3165, G01V 316

Patent

active

046282661

ABSTRACT:
An apparatus for direct airborne electromagnetic prospecting of hydrocarbons by transmitting many primary electromagnetic fields and detecting any deviation of the primary electromagnetic fields due to secondary electromagnetic fields. The transmitting and detecting operations are carried out first over a known area, as a stage of system instruction, and then over an unknown area, as a stage of actual prospecting. A transmitting system, suspended vertically from a helicopter, is adapted to radiate electromagnetic fields of many different frequencies and many different orientations controlled automatically. A receiving system, suspended vertically from the transmitting system, is adapted to detect signals of three orthogonal components of electromagnetic deviations as a function of helicopter altitude, frequency, transmitter loop orientation and receiver antenna orientation. Also a processing system is provided to store and process an enormous volume of data directly into probability levels of hydrocarbon presence or absence over the area explored.

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Tarchov, AG., Electrorazwedka-Sprawocnik Geofizika; "Nedra", Moskva 1980, pp. 164-167, 169, 214-216.

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