TRANSIENT ELECTROMAGNETIC MONITORING OF THE CRYOLITHOZONE: MATHEMATICAL MODELING
M.I. Epov1,2, V.N. Glinskikh1,2, O.V. Nechaev1, K.N. Danilovskiy1, I.V. Mikhaylov1,2
1Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
2Novosibirsk State University, Novosibirsk, Russia
Keywords: Transient sounding, electromagnetic monitoring, cryolithozone, numerical modeling and inversion, vector finite element method, Sumudu transform, artificial neural network
Abstract
The paper presents theoretical results on mathematical modeling and numerical inversion of transient electromagnetic data for the monitoring of the state of the cryolithozone. Solutions to the direct and inverse problems are considered based on the vector finite element method, the Sumudu integral transform and the apparatus of artificial neural networks. We show the capability of spatial localization of thaw zones (taliks) with transient cross-borehole exploration systems in a geoelectric model that takes into account the dispersive properties of frozen rocks. The performance and accuracy of the developed algorithms are assessed.
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