I.V.Litvinenko was one of the first researchers who in the process of research of the Baltic Shield, including the area of the Kola ultra-deep well, made a consistent transition from traditional low-detail work on long-length GZS profiles to highly detailed study of the Earth's crust with a corresponding transformation of the methodology of deep seismic studies.

The initial data used in determining the velocity from the hodographs of reflected waves always contain random errors. The influence of these errors can be minimized by using mathematical statistics methods in the processing. In addition, it is possible to evaluate the accuracy of the obtained result.

In the east of the Russian Platform the seismic method of reflected waves is the main method of searching for buried oil-bearing structures. Due to the complex seismogeological conditions of this region, the geological efficiency of seismic exploration in search of localized hollow concepts in Carboniferous and Devonian sediments remains low in some areas. There are significant difficulties both in conducting field observations and in geologic interpretation of the obtained materials.