Abstract: On the basis of described covalent bond cross.linked slructure and non-covalent bond associated struc:ture in coal leasures, this pa-per fiurther presents the water invasion phase coal-forning environmnent is favorable for preservation of coal lipids, development of non-covalent bond associated structure of coal measures and formation of coal-derived hydrocarbons. Solid ¹³C muclear magnetic resonance spectrometer and natural evolution combining with thernocompression simulator are used for analysis of variation of carbon matrix and functional group in the course of kerogen thermal evolution, showing that lipid carbons mainly contrbnte to the hydrocarbon generation. lhis paper also makes a corre-lation of carbon matrix and functional group composition attributes in different parent materials like lacustrine facies shale, coal and coal mea-sure shale kerogen. as well as their tendencies of oil or gas generation during the period of thermal evolution of liquid window. indicating that methylene[(-CH²-)ⁿ] is a dominant funetion of hydroearbou generation from kerogen and the key factor for coal-derived crudc oil is hat a cer-Lain number of methylene functional groups existing in coal-formed kerogen. This knowledge is appicable for rescarch of lacustrine and/ or ma-rine hydrocarbon generation.

Key words: covalent bond cross-linked structure, noncovalenl bond associaled structure, ¹³C nuclear magnetic spectrum, carbon with oil polential, carbon with gas potential