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, petrographicstudy of rocks in sections in combination with scanning electron microscopic studiesand X-ray diffractometry, post-deposition changes in carbonate deposits and the degreeof their influence on the reservoir properties of the Lower Famenian reefs depositsof the Timan-Pechora oil and gas province were studied. A significant heterogeneityof the void was determined in the studied rocks. It was revealed that the significantvariability of reservoir properties and the complex configuration of the void is due tothe processes of recrystallization, dolomitization, leaching, calcitization, sulfatizationand fissuring.