Investigation of Wave Phenomena During the Seismic Survey in the Permafrost Areas Using Two Approaches to Numerical Modeling

In the recent years the Arctic onshore and offshore areas has become the region of interest. In the cold conditions, inhomogeneous permafrost ground with ice and methane inclusions is formed. It affects all conducted full-scale seismic measurements. The aim of this work is creation of the computatio...

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Bibliographic Details
Published in:Lobachevskii journal of mathematics 2024, Vol.45 (1), p.231-238
Main Authors: Guseva, E. K., Golubev, V. I., Petrov, I. B.
Format: Article
Language:English
Subjects:
Algebra
Analysis
Geometry
Inclusions
Mathematical Logic and Foundations
Mathematics
Mathematics and Statistics
Numerical models
Permafrost
Probability Theory and Stochastic Processes
Seismic surveys
Structured grids (mathematics)
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Summary:In the recent years the Arctic onshore and offshore areas has become the region of interest. In the cold conditions, inhomogeneous permafrost ground with ice and methane inclusions is formed. It affects all conducted full-scale seismic measurements. The aim of this work is creation of the computational settings for reproduction of such wave processes that is able to encompass the main features of the region. Two approaches to numerical modeling are introduced and compared on the obtained wave patterns and seismograms. The first one suggests the construction of multiple curvilinear grids. For the second one, a single rectangle grid is created with different elastic parameters in each cell. Linear elasticity model is used as a governing system of equations. It was solved using the grid-characteristic method on structured grids. As a result of the analysis, the advantages and disadvantages of the approaches are distinguished. The influence of the domains on the wave profiles is studied, reproduced rich wave phenomena is defined.
ISSN:1995-0802
1818-9962
DOI:10.1134/S1995080224010190