Control of thawing of permafrost soils in the wellhead zone of production wells using geophysics methods

UDK: 502.55:622.24

DOI: 10.24887/0028-2448-2025-8-84-88

Key words: production wells, permafrost soils, geophysical studies, control of thawing of permafrost soils, seismic exploration, electrical exploration

Authors: A.E. Arnbrekht (NK Rosneft-NTC LLC, RF, Krasnodar); G.E. Vikulov (NK Rosneft-NTC LLC, RF, Krasnodar); E.V. Zenkov (NK Rosneft-NTC LLC, RF, Krasnodar); A.A. Mailyants (NK Rosneft-NTC LLC, RF, Krasnodar); V.V. Solodkin (NK Rosneft-NTC LLC, RF, Krasnodar)

The article deals with the control of thawing of permafrost soils in the wellhead zone of production wells using geophysics methods. An important aspect in the construction and operation of wells in the cryolithozone is the preservation of the rocks of the near-well space in a frozen state during the entire period of operation. Therefore, a significant role is assigned to monitoring the dynamics of rock thawing in the upstream zone of production wells at all bush sites located on permafrost rocks. The main method of control is thermometry. However, its propagation distance and information content are very small, as a result of which it is impossible to determine the actual dimensions of the melted strata in space at the entire depth of permafrost soils in the Far North. In turn, the development of high-quality and effective solutions for geotechnical monitoring, minimizing environmental impacts and maintaining safe working conditions are impossible without sufficient information about soils and rocks.

The task of obtaining more complete and reliable information about the structure and condition of permafrost rocks will be solved by geophysical methods based on digital technologies. The article discusses seismic and electrical exploration methods. The possibility of identifying thawing zones and monitoring the dynamics of their growth based on seismic exploration data was practically confirmed, but when based on electrical exploration data, it requires confirmation at real existing sites.

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