Hydrothermal transformation of heavy oil and organic matter from carbonate rocks of oil fields of Tatarstan

AbstractIn laboratory model experiments were identified features of hydrothermal transformation of heavy oil and organic matter productivity of carbonate rocks from Bashkirian stage of deposits of the Middle-Carboniferous of Tatarstan territories. Experiments were conducted at temperature of 360 °C in hydrogen environment in presence of aqueous phase. The impact of hydrothermal factors on rocks leads to decrease in content of insoluble OM - kerogen and increase content of free hydrocarbons. With increase in content of saturated and aromatic hydrocarbons, content of resin-asphaltene components decreases. Changes in composition lead to significant reduction in density of heavy oil from 0.9254 to 0.8273 g/cm3.