Abstract: Based on the analysis of the geochemical characteristics of liquid products by hydro-pyrolysis modeling of mature humic coal, a discussion was made for evolutionary pattern of its yields group composition and chromatographic features of the residual and expelled hydrocarbons. It is pointed out that the difference in characteristics between residual and expelled hydrocarbons resulted from the migration effects which should be considered in the course of oil-source correlation and the research of organic matter type and its maturity.

Key words: Humic coal, Pyrolysis modeling, Migration effect