Deep penetration well logging system and means

G - Physics – 01 – V

Patent

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324/9

G01V 3/30 (2006.01)

Patent

CA 1215116

DEEP PENETRATION WELL LOGGING SYSTEM AND MEANS (D#77, 740 -F) ABSTRACT OF THE DISCLOSURE A well logging system and method of the present invention determines the dielectric constant and/or conductivity of earth formations some of which have fluid invasion. The system and method of the present invention include the transmission of electromagnetic energy into the earth formations from a first location in a borehole in the formations at a frequency which enables the electromagnetic energy to propagate throughout the surrounding earth formations. Electromagnetic energy is received by receivers at three locations in the borehole which are spaced longitudinally from the location of the transmission of the electromagnetic energy. The receivers provide signals representative of the received electromagnetic energy. The dielectric constant and/or resistivity of the earth formations are determined in accordance with the signals from the three receivers. -I-

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