Study of the influence post-deposition changes on the reservoir properties Lower Famenian carbonate sediments the Pechoro-Kolva oil-and-gas bearing region

Abstract

Based on the analysis of the results of permeability and porosity, petrographic
study of rocks in sections in combination with scanning electron microscopic studies
and X-ray diffractometry, post-deposition changes in carbonate deposits and the degree
of their influence on the reservoir properties of the Lower Famenian reefs deposits
of the Timan-Pechora oil and gas province were studied. A significant heterogeneity
of the void was determined in the studied rocks. It was revealed that the significant
variability of reservoir properties and the complex configuration of the void is due to
the processes of recrystallization, dolomitization, leaching, calcitization, sulfatization
and fissuring.