Postsedimentary Transformations of Silurian Carbonate Rocks on the Central Part of the Chernyshev Ridge (Timan–Pechora Province)

Abstract

The article presents the results of studies of postsedimentary processes in Silurian carbonate rocks of the central part of the Chernyshev Ridge. A complex combination of secondary transformations in carbonate reservoir is shown. The sedimentary sequences show manifestations of regional and superimposed lithogenesis. In addition to stagewise catagenetic changes, the sediments were also subjected to regressive infiltration catagenesis (epigenesis), which was accompanied by leaching and dolomitization of limestone. All this significantly affected the filtration–capacitive properties. The obtained data can contribute to the identification of new objects for exploration drilling and optimization of exploration works in complex regions.