Measurement of subterranean lithology using electromagnetic energy
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United States of America Patent
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Dec 13, 2005
Grant Date -
Jun 26, 2003
app pub date -
Apr 22, 2002
filing date -
Apr 21, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention subject of this application pertains to a method and apparatus for measuring the subterranean lithology using electromagnetic energy. The invention is applicable to the measurement from within uncased boreholes, i.e., and open-holes. The present invention transmits and receives electromagnetic energy deep into a geologic formation from a borehole, while also providing high resolution for distant measurements and the ability to control the direction in which the measurements are taken. The invention does not require a receiver to be located at the ground surface or in another borehole. In simple terms, the apparatus of this invention is able to 'look around' into the surrounding geologic formation from a stationary position.
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