煤岩组分化学结构随热演化变化与生烃性研究

应用显微傅立叶红外光谱分析，研究了胜利油田附近的石炭系太原组煤烃源岩中主要生烃有机组分化学结构特征。结果表明，荧光镜质体富含芳烃结构和含氧有机结构，而树脂体和角质体富含脂肪烃结构，荧光镜质体和树脂体烷基烃碳链短或支化程度高。随热演化程度增高，荧光镜质体和树脂体红外光谱参数(CH2 CH)／C=C和CH2／CH3比值逐渐减小，而孢子体和角质体的这两个参数先增后减，反映出荧光镜质体与树脂体具早期生烃特点，而孢子体与角质体生烃演化具弱-强-弱特性，具生烃高峰期。

Variations of coal maceral chemistry with elevated maturity and their hydrocarbon generation

The chemistry of macerals at elevated maturity in a series Carboniferous coal source rocks, from Shengli Oil field in eastern China was analyzed using Micro-FT.IR. Results show that fluorescent vitrinite was abundant in aromatic and carbon-oxygen structures while resinite and cutinite are rich in aliphatic structures. The aliphatic chain of the fluorescent vitrinite and resinite was shorter and more branched than that of cutinite and sporinite. The ratio of (CH 2+CH 3)/C=C and CH 2/CH 3 of the fluorescent vitrinite and resinite are decrease with the elevation of maturity, while these two ratios of cutinite and sporinite decrease after increasing with maturity, which indicate that vitrinite and resinite are characterized with early maturity to produce immature oil but cutinite and sporinite had a peak hydrocarbon generation during their thermal evolution.