{'fraction_non_alphanumeric': 0.01440329218106996, 'fraction_numerical': 0.00720164609053498, 'mean_word_length': 5.27741935483871, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Effect of Hydrothermal Fluids on the Composition of Heavy Oils

The paper presents the results of comparative studies to identify the regularities in the transformation of the composition of heavy oils of different genotypes during their interaction with hydrothermal fluid at a temperature of 310 °C and a pressure of 50 MPa. Under hydrothermal impact, the content of saturated hydrocarbons and linear alkanes in the composition of heavy oil of type A1 decreases, and the content of aromatic hydrocarbons and resins increases. During hydrothermal impact on heavy oil type B2, the amount of aromatic hydrocarbons in its composition decreases, the content of asphaltenes and saturated hydrocarbons increases. The peak of the molecular weight distribution of n-alkanes shifts to the low-boiling region, and the content of iso-alkanes decreases. This indicates that the composition of heavy oils affects the dominance of certain reactions occurring in the hydrothermal fluid.