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Vol. 10 (2007 year), No. 2

Savchenko S.N., Kozyrev A.A.
A comparative analysis of the rock stressed state in the sections of SG-3 and KTB superdeep wells and in their vicinities

We have reported here temperature dependence of electrical resistivity, heat capacity of natural tremolite up to 1300 K for the first time. The samples used in the present study, are natural tremolites from the core samples of the Kola Superdeep well (SG-3) from the depth of 12148 meters and a surface sample from Idegondanahalli, Karnataka, India. Both samples have witnessed identical peak metamorphic conditions. The electrical resistivity of the tremolite from the SG-3 is found to be 1.02?1011 Ohm.cm at 415 K, and decreases exponentially with the increase of temperature up to 903 K, where the electrical resistivity increases from 1.412?106 Ohm.cm to 3.158?107 Ohm.cm. The transition is interpreted as thermally induced decomposition of tremolite, as the transition in the temperature range 903 K to 963 K is found to be irreversible in their electrical resistivity behaviour. This phase transition is also observed at 1050 K in differential thermal analysis (DTA). Temperature dependence of heat capacity of tremolite up to 1300 K also confirmed the phase transition. The phase transition observed in the SG-3 sample has been compared with the thermal behaviour of a surface sample of tremolite from Idegondanahalli.

(in Russian, стр.5, fig. 4, tables. 0, ref 7, Adobe PDF, Adobe PDF 0 Kb)

Vol. 14 (2011 year), No. 3

Kozyrev A.A., Kalashnik A.I., Kaspar'yan E.V., Savchenko S.N.
Conception of organization of geodynamic monitoring of oil and gas facilities of the Western sector of Russian Arctic

Oil and gas facilities are quite complicated and critical facilities which safety and efficiency should be provided for a long-term period. The peculiarities of oil and gas facilities construction and operation under complicated geodynamic conditions have been considered. The basic principles of organization of geodynamic monitoring of geological environment state connected with oil and gas complex construction have been formulated. Methodics of geodetic observations and mathematical justification of observation sites location plan have been proposed. Geophysical methods – seismic tomography and georadar profiling – give significant addition to the observation systems as a whole. The system of geodynamic monitoring along oil and gas main pipelines on the territory of the Kola Peninsula has been proposed.

(in Russian, стр.14, fig. 11, tables. 1, ref 10, Adobe PDF, Adobe PDF 0 Kb)