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本文以腐殖型干酪根——褐煤进行热模拟实验,对各演化阶段所产出的气体、水分、液体烃和残渣均定量地进行收集并测定了它们的组成,研究了煤成气的组分变化规律,求出了演化至各煤阶时的生气量。对煤化过程各组分碳同位素的变化进行了解释,阐明了煤的δC~(13)与煤化程度和地质年代无关的原因。通过模拟实验和 R_0的测定,讨论了温度与演化程度的关系。最后得出云南柯渡地区褐煤的视煤气发生率,此数据对于计算该地区煤成气量具有一定的意义。
In this paper, the humic kerogen-lignite thermal simulation experiments were carried out to quantitatively collect the gas, water, liquid hydrocarbons and residues produced in each evolution stage and determine their compositions. Divided the law of change, obtained when evolved to the coal rank when the amount of gas. The changes of carbon isotopes in each component of coalification process are explained, and the reasons why coal δC ~ (13) has nothing to do with the degree of coalification and geological age are clarified. Through the simulation experiment and R_0 determination, the relationship between temperature and evolution degree is discussed. Finally, the apparent coal gas occurrence rate of lignite in the area of Ke Du, Yunnan is obtained. This data is of certain significance for calculating the coal gas formation in this area.