%0 Journal Article %T Search for extremity zones with discrete mathematical analysis algorithms to identify risks when drilling based on geophysical data %A Bogoutdinov, S.R. %A Odintsova, A.A. %A Pirogova, A.S. %K Discrete mathematical analysis, density, geological section, permafrost, gas content %J Russian Journal of Earth Sciences %D 2022 %N 22 %P 8 %I Geophysical Center of the Russian Academy of Sciences