The research of the timano-pechora ultra-deep magnetic rocks based on this borehole magnetometry
  • Article Type: Research Article
  • Eurasian Journal of Biosciences, 2020 - Volume 14 Issue 1, pp. 933-938
  • Published Online: 16 Apr 2020
  • Open Access Full Text (PDF)

Abstract

Purpose of the article: to obtain new data about magnetic fields, magnetization and magnetic susceptibility of rocks at great depths in conditions of their natural location. The application of the borehole magnetometry method in the absence or incomplete flow of core material from ultra-deep boreholes in combination with geological methods of study allows: to isolate intrusive bodies in the sections of deep boreholes, to establish the location of roof and bottom of dolerite intrusions, localize and determine their power. Methods: magnetometer-inclinometers have been developed at the Geophysics Institute of the Ural Department of Russian Academy of Sciences for magnetometer studies, which allow continuous measurements of the magnetic susceptibility of rocks (χ), vertical component (Za) and the entire vector of the horizontal component (Ha) of the geomagnetic field; magnetic azimuth (Am) and zenith angle (φ) of the borehole. The methodology of processing and interpretation of magnetic properties of dolerite intrusions has also been developed by the Institute of Geophysics of the Ural Department of Russian Academy of Sciences. Results: The possibilities of the downhole magnetometry method were evaluated to research the magnetic properties of rocks and refinement of lithological and stratigraphic characteristics of the Timan-Pechora ultra-deep well (SG-5) at the depth below the gas condensate deposit to assess the prospects of oil and gas bearing capacity of Silurian - Lower Devonian deposits. Conclusions: The magnetic characteristics and structural-texture features of rocks are researched. The magnetic properties of dolerite intrusions in the natural occurrence of this borehole magnetometry, namely - the magnetic susceptibility, magnetic field and magnetization are determined. More exact location of roof and bottom of dolerite intrusions is established. Its capacities are localized and determined in the section of Timan-Pechora superdeep well at the depth of more than 3.5 km, which allowed specifying the lithological section of the borehole.

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