SIMULTANEOUS MONITORING OF THE TEMPORAL VARIABILITY OF MAGNETOTELLURIC IMPEDANCE DURING THE POWERFUL KAMBARATA INDUSTRIAL EXPLOSION

(Lozovsky I.N. Varentsov Iv.M. Rodina T.A. )

The paper presents an approach to process magnetotelluric impedance monitoring data in the search for the changes in geoelectrical structure related to a powerful industrial explosion during the construction of Kambarata hydroelectric station in Kyrgyzstan. The stationary remote reference estimates of impedance and its invariants prior to and after the explosion were compared. The impedance changes over time were analyzed for a series of time windows. The new software tools for analysis, visualization, rejection (by the value of relative estimation errors and coherency sorting criteria) and the final robust averaging of partial impedance estimates have been developed and tested. The necessity of simultaneous monitoring systems for solving problems of magnetotelluric monitoring is demonstrated.......

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  • 2020  № 4, pp. 68-74

GEOPHYSICAL MONITORING OF UNDERGROUND BLOCK ORE LEACH

(Golik V.I. Dmitrak Yu.V. )

The results of geophysical studies of rocky ore-bearing massifs of a metal deposit are presented. By applying complex geophysical research methods, a correlation was established between the parameters of metal extraction and the parameters of the preparation of the rock mass. It is shown that the assessment of the properties of the rock mass prepared for underground leaching using geophysical methods, including the method of interwell acoustic sounding, allows the leaching process to be performed with the specified parameters for ore preparation to obtain the expected results.......

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  • 2020  № 4, pp. 75-79

SCATTERED WAVES ALLOCATION AND ANALYSIS BY THE TRANSMITTING AND RECEIVING FOCUSING METHOD FROM THE SEISMIC CDP DATA

(Smirnov A.S. Ryabkov V.V. )

In seismic exploration, for the fault or fractured zones in a carbonate section studies, scattered waves are successfully applied to obtain information additional to the results of the conventional reflected waves interpretation. Recent years It was shown, the application of scattered waves jointly with reflected waves analysis can also be useful in hydrocarbon exploration in the settings of a “formable” section of Western Siberia.......

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  • 2020  № 4, pp. 80-88

MULTI-AZIMUTH APPROACH OF DEPTH IMAGING FOR MARINE TOWED STREAMER DATA

(Esinov B.S. Litvyakova O.O. Sakharov A.B. Rossiyskaya E.M. Korolev A.E. )

In practice, imaging and processing solutions to poor seismic illumination of narrow azimuth towed streamer marine data is limited due to acquisition design. We show here several examples of marine data from different fields located on Norwegian Continental Shelf where the multi-azimuth approach of the velocity model building and imaging has helped to improve the quality of seismic image and as a result to perform a more reliable interpretation. The workflow included advanced multi-azimuth depth processing as well as multi-azimuth velocity model building and imaging.......

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  • 2020  № 4, pp. 89-97

ONE PRACTICAL CONSEQUENCE FROM THEOREMS OF UNIQUENESS AND EQUIVALENCE OF INVERSE GRAVITY PROBLEM

(Petrishchevsky A.M. )

Theoretical basics and practical examples of realization of the probabilistic-determined approach to interpreting of gravity anomalies using a sweeping out of volume sources on a surface of equivalent spheres are reviewed. Unlike the finite element approach, objects of interpretation are the spheres equivalent to complicated systems of density inhomogeneities. 3D-distributions of equivalent spheres contain information on a deep structure and a rheology of the crust and upper mantle.......

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  • 2020  № 4, pp. 98-111
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