APPLICATION OF PYROLYSIS-GAS CHROMATOGRAPHY TECHNIQUE TO EVALUATION OF COAL-GENERATED HYDROCARBON

Based on kerogen-generated hydrocarbon model, a new method to calculat e hydrocarbon yields for coals and coaly samples was put forward by me ans of pyrolysis technique. At the same time, the empirical criteria s uggested by Powell were revised. The threshold value was preliminarily defined as HC yields >30 mg HC per gram TOC for effective gas source rocks and >60 mg HC per gram TOC for effective oil source rocks. Addit ionally, it was also confirmed that the relative compositions of the t hree ranges of C1-C5 total hydrocarbons, C6-C14 n-alkanes plus n-alken es and C15(+) n-alkanes plus n-alkenes from pyrolysates can be effecti vely used to distinguish the coal-generated hydrocarbon types.