Geochemical Characterization of Paleozoic Source Rocks in Nerutinskaya-3 Well, Timan-Pechora Petroleum Province

This article presents the results of geochemical studies of core samples from Nerutynskaya-3 well, located in Timan-Pechora petroleum province in the northern part of European Russia. The study aims to assess the hydrocarbon generation potential of the Silurian and Upper Devonian sections. The source rocks of Nerutynskaya-3 well, spanning the Carboniferous, Devonian, and Silurian periods, were characterized. Pyrolytic chromatography revealed that the studied intervals, based on total organic carbon (TOC) content, belong to sub-Domanikoid and Domanikoid formations, with Type II kerogen. The sources of organic matter were differentiated throughout the section, and distinct hydrocarbon generation zones were identified. Using Tmax values, the thermal maturity stages of the organic matter were determined, while S1 and S2 parameters were applied to evaluate the generation potential. Biomarker analysis helped identify the depositional environment of the organic matter and confirmed its kerogen typing. Key elements of the petroleum system were indicated. Based on these findings, a basin modeling study was conducted to reconstruct the evolution of the Paleozoic sedimentary complex. The burial history was restored. The stages of catagenetic maturity of organic matter were determined and activation energy calculations were performed.