Yu.G. Astrakhantsev - Dr. Sc. (Eng.), Head of Laboratory of Borehole Geophysics, Institute of Geophysics, Urals branch of RAS (Ekaterinburg). E-mail: skvgeoph@mail.ru N.A. Beloglazova - Ph. D. (Eng.), Senior Research Scientist, Laboratory of Borehole Geophysics, Institute of Geophysics, Urals branch of RAS (Ekaterinburg). E-mail: bna408@mail.ru N.K. Mironova - Post-graduate Student, Institute of Geophysics, Urals branch of RAS (Ekaterinburg) E-mail: natka.2013@yandex.ru Yu.V. Golikov - Dr. Sc. (Geol.-Mineral.) E-mail: p12252@yandex.ru

The article describes a new combined downhole tool for ore wells logging, capable to produce simultaneous recording of 22 informative parameters with a quantization depth step of 10 cm for one tripping operation in boreholes. Measured parameters: temperature range from 0 to 70°C, three components of the magnetic field in the range of ±80000 nT, magnetic susceptibility from 100 to 200 000∙10−5 SI units, borehole zenith angle from 0° to 60°, borehole magnetic azimuth from 0° to 360°, the apparent resistivity up to 10000 Ω∙m, transient characteristic caused by polarization on eight times after the current pulse turning off from 0 to 80%, natural electric field in the range of ±2500 mV, natural gamma radiation (integral value) from 2 to 100 μR/h. Well-logging complex applied in the instrument provides fairly complete solution of geological problems occurring at various stages of different ore deposit explorations with minimal economic costs.

 

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