The composition of products obtained upon the mechanical treatment of oil-saturated sandstone in various gas atmospheres and upon its thermolysis in supercritical water was studied. It was found that, upon mechanical treatment in the atmospheres of argon and air, the yield of bitumoids (organic matter) and the amounts of asphaltenes and oils in the composition of this organic matter decreased. Upon the mechanical treatment of sandstone in the presence of hydrogen, no considerable changes in the concentration and sub stantial composition of bitumoids were observed, as compared with bitumoids extracted from the initial sandstone. A combination of the mechanical treatment of oil-saturated sandstone and the subsequent aquather molysis under supercritical conditions led to an increase in the yields of liquid and gaseous products. In the composition of liquid products, resinous components predominantly occurred. The individual and group compositions of alkanes and alkyl-substituted mono-, bi-, and triaromatic hydrocarbons in bitumoids and pyrolysis products were analyzed. Methane was predominant among hydrocarbon-containing components in the gaseous products formed upon the mechanical treatment of sandstone in the presence of various gases, whereas propane was predominant upon the aquathermolysis.
