Identification of geodynamic movements based on the results of geodetic monitoring measurements

Panzhin, A. A.

doi:10.1051/e3sconf/202019204001

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…3. The distance R at which the geodynamic influence of man-made objects on the array can be felt is estimated from 3-5 of their sizes r [Dahm et al, 2012] to 20-30 r according to geodynamic monitoring [Panzhin, 2020] and even more [Dobrovolsky., 1991]. Since the dimensions of the UGS r considered are the first kilometers, we assumed that the radius of their geodynamic influence area R reaches 100 km in the situation under consideration and analyzed the seismic events that occurred at this distance from the UGS.…”

Section: Discussionmentioning

confidence: 99%

Exploring the Nature of Seismic Events in the Underground Gas Storages Area of the Volga Federal District

Batugin

Ogadzhanov

Han

et al. 2022

Russian Journal of Earth Sciences

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Seismicity during UGS operation had not yet been known in Russia. This work presents studies on the manifestation of seismicity in the area of three underground gas storages (UGSs) located in the south-eastern part of the East European Platform (European part of Russia). The tectonic structure of this region, geodynamic conditions and technological characteristics of «Vostochnoye», «Zapadnoye», «Uzhnoye» UGS are presented. An analysis of the situation with the manifestation of seismicity allows us to conclude that it is technogenic in nature, a feature not previously noted on Russian UGSs. There is a wide list of signs indicating the relationship between the mode of operation of UGSs and the nature of seismicity: prior to the start of UGS operation technogenic seismicity in this area was not known; there is a clear correlation between UGS operation and seismicity; the epicenters of seismic phenomena are located in the geodynamic influence zone of the UGS; in the region there are Earth crustal faults that experienced activation in late Cenozoic time and respond to strong earthquakes of neighboring tectonic areas, which consequently indicates their predisposition to reactivation; the change in pressure in the UGS reservoir is sufficient to induce seismicity. The phenomenon of increasing seismic activity during the gas extraction period is noted, which is explained by the effect of softening of the containing massif and its subsequent push-like deformation when the gas pressure in the reservoir is reduced. Despite the weak seismicity, which does not pose a threat to UGS facilities and adjacent territories, it is proposed to include seismic observations in the complex geodynamic monitoring at Russian UGS to establish patterns over a long period of time.

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Section: Discussionmentioning

confidence: 99%

Exploring the Nature of Seismic Events in the Underground Gas Storages Area of the Volga Federal District

Batugin

Ogadzhanov

Han

et al. 2022

Russian Journal of Earth Sciences

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Accuracy Assessment of the Principal Strains in Deformation Analysis

Bannikov,

Gordeev

2023

SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings

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Research Object and Relevance. The main components of the strain tensor and their accuracy assessment are the research objects in this work. When conducting monitoring using geodetic methods, it is usually not enough to determine only the displacements of reference points; it is also necessary to determine the presence and magnitude of deformations. This task is directly related to the accuracy assessment of such characteristics as principal strains, dilatation, shear strains, and rotation. Research Methods. In conducting this research, the authors used a system of equations arising on a local subdomain of triangular shape in the finite element method for a twodimensional deformation model. The parametric principle of accuracy assessment was applied, where the components of the strain tensor were taken as parameters. Results. More rigorous formulas for the mean square error functions of principal strains have been found. The influence on their accuracy assessment of both the triangle shape and the directions of principal strains is shown. Based on geodynamic monitoring data of a tailings dam, mathematical modeling of the influence of the finite element shape on the possible error in the accuracy assessment of principal strains was carried out. Discussion. The results of analyzing the influence of covariances that arise naturally between the components of the strain tensor show the most interesting results when assessing the accuracy of principal strain components. The non-symmetry of principal strain accuracy estimates for a triangular element shape other than an equilateral triangle is convincingly shown. Conclusion. This study demonstrates the need for more rigorous approaches to assessing the accuracy of deformation characteristics. Incorrect interpretation of monitoring results can lead to both unnecessary labor and financial costs, as well as fatal consequences due to incorrect assumptions in calculations.

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Identification of geodynamic movements based on the results of geodetic monitoring measurements

Cited by 2 publications

References 7 publications

Exploring the Nature of Seismic Events in the Underground Gas Storages Area of the Volga Federal District

Exploring the Nature of Seismic Events in the Underground Gas Storages Area of the Volga Federal District

Accuracy Assessment of the Principal Strains in Deformation Analysis

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