Lithology of the Silurian deposits on Usin-Kushshor square of the Chernyshev ridge

The lithological peculiarities of the Silurian deposits of Khosedayu Swell have been described. Objects of study are the rocks traversed by drilling with wells 1 and 2 Usin-Kushshor. Particular attention is paid to the secondary transformations of rocks and their influence on reservoir properties. Postsedimentary transformations did not lead to a significant increase of effective porosity. Usable capacity formed primarily of fractured rocks and leaching them to a lesser extent