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采用显微傅利叶红外光谱（Ｍｉｃｒｏ－ＦＴＩＲ）研究了源岩中三个系列显微组分包括陆生高等植物成因的镜质体、丝质体、木栓质体、孢子体、角质体，水生动物成因的笔石、几丁虫及热演化过程中次生的组分沥青等的化学组成与结构演变特征。研究表明，所有显微组分随其演化程度增高，脂族链变短，含氧官能团减少，芳烃富集且芳环缩合度增加。镜质体含丰富的芳烃ＣＣ，壳质组含丰富的脂族烃Ｃ—Ｈｘ，笔石、几丁虫含丰富的含氧官能团和氧桥（Ｃ—Ｏ—Ｃ及Ａｒ—Ｏ—Ａｒ等），沥青的脂族烃Ｃ—Ｈｘ含量介于壳质组与镜质体之间，丝质体含丰富的芳烃ＣＣ及氧桥。
Micro-FTIR was used to study the effects of three series of microstructures including terrestrial plants on vitrinite, filamentous, cork, sporophyte, horny body, aquatic The petrophysical composition and structural evolution of penicillin, chitin and the secondary components of bitumen during thermal evolution. The results show that all the microscopic components increase with their degree of evolution, the aliphatic chains become shorter, the oxygen-containing functional groups decrease, the aromatics enrich and the degree of aromatic ring condensation increases. The vitrinite is rich in aromatics CC, while the chitosan is rich in aliphatic hydrocarbons C-Hx. Penicillium and chitin are abundant in oxygen-containing functional groups and oxygen bridges (C-O-C and Ar-O-Ar, etc.) ). The content of aliphatic hydrocarbon C-Hx in asphalt is between that of chitin group and vitrinite. The filamentous body is rich in aromatics CC and oxygen bridge.