湖相生物碎屑灰岩热模拟气特征

CHARACTERISTICS OF PYROLYZED GAS GENERATED BY HYDROPYROLYZED BIOCLASTIC LIMESTONE FROM LACUSTRINE FACIES

通过对山东平邑盆地下第三系湖相生物碎屑灰岩加水热模拟气的研究，探讨了热解气的产率、组成及结构参数的变化特征。湖相生物碎屑灰岩热解气总体上以非烃气为主要组分，非烃中又以ＣＯ２含量最高，其高含量与碳酸盐岩分解有关；其次为Ｎ２和Ｈ２，ＣＯ含量甚微。烃气中以烷烃为主，烯烃含量很低。在正异构烃组成中异构烃含量相对高。干燥系数和酸烷比随模拟温度升高而规律变化，可以用来衡量有机质的成熟度。

By researching pyrolyzed gas generated by hydropyrolyzed bioclastic limestone from lacustrine facies in Pingyi basin, Shandong Province, the evolution characteristics of yields, compositions and structure parameters of pyrolyzed gas are discussed. Generally, the content of nonhydrocarbon gas is high but the content of hydrocarbon is low. In nonhydrocarbon gas, carbon dioxide is main composition but carbon oxide is very few. The generation of carbon dioxide is concerned with the decomposition of carbonate rock. In hydrocarbon gas, the main composition is alkane but the alkene is very few. The normal alkane content is more than the isoalkane′. Dry coefficient and acid alkane ratio all evolute regularily with temperature increasing and can be used as mature staff.