Comparative Analysis of Organic Matter of Reservoir Rocks and Domanik Deposits of the Bavly Oil Field

Core material taken over a section of the Bavly multipay field of Tatarstan (Russia), and extracts from it have been studied by thermal analysis, IR and EPR spectroscopy, and gas-liquid chromatography. The trends of changes in the amount and fractional and hydrocarbon-group compositions of residual oil and oil components irreversibly adsorbed on the rock depending on the age of deposition have been revealed. In rocks from the Trans-Volgian and Dankovian–Lebedyanian horizons attributed to domanik deposits, the organic matter content has been determined with an estimate of the proportion of bitumoid and kerogen in it, and the peculiarities of their fractional and hydrocarbon-group compositions have been revealed.