Seismic instruments: article

New complex downhole tool for primary logging in the open hole of wells on the infiltration type uranium mine fields
A.V. Legavko D.A. Legavko
Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Journal: Seismic instruments
Tome: 58
Number: 4
Year: 2022
Pages: 175-186
UDK: 550.8.056
DOI: 10.21455/si2022.4-11
Keywords: gamma-ray logging, electrical logging, directional logging, complex downhole tool, infiltration uranium deposits, underground leaching
Аnnotation: The article shows the relevance of complexing the main open hole logging methods for wells constructed during exploration and development of infiltration type uranium deposits. Description of the new complex downhole tool developed by the authors for simultaneous gamma, electrical and directional logging is given in the article. The downhole tool is made according to a modular scheme, includes standard, modernized and new functional logging units, effectively combines analog, pulse and digital output data format. The modular architecture of the downhole tool allows conducting open hole logging both separately, by separate methods and modules, and simultaneously in one common assembly. The field tests result of a new tool model sample carried out at one of the infiltration mine field of the Trans-Ural uranium-ore region of Russia are presented. The tests result convincingly show the high accuracy of measurements with a new downhole tool and the complete compliance with the regulatory instructions of the obtained logging data. The use of a new complex tool during geophysical surveys in the open hole of wells constructed during the search, exploration and development of uranium and ore deposits will increase the efficiency of logging operations, lower their cost and reduce the forced downtime of drilling crews.