论文部分内容阅读
应用现代测试技术手段和实验方法,研究龙口煤田古近系褐煤地球化学特征并分析其生物气生成潜力。研究结果表明,龙口褐煤的Ro值平均为0.41%,处于未成熟阶段,挥发组分含量高,表明可生物降解潜力大;显微组分中腐植组含量占绝对优势,体现良好的生化活性;氯仿沥青“A”抽提率在1.8%~7.5%之间,属于好的烃源岩;族组分组成特征表明龙口褐煤处于有机质演化的早期阶段,有利于生物气生成;饱和烃碳数分布特征表明龙口褐煤形成的沉积环境为弱还原的淡水-微咸水深湖相,其母质来源中有低等水生生物的混入;龙口褐煤腐殖酸成熟度低,其分子结构中芳香环化程度低,其母质来源主要为陆生的含维管束植物。龙口煤田褐煤地球化学特征综合表明其具有良好的生物气生成潜力。
By means of modern testing techniques and experimental methods, the geochemical characteristics of the lignite in Paleogene in Longkou Coalfield are studied and their potential for biogas generation is analyzed. The results showed that the average Ro value of Longkou lignite was 0.41%, which was in the immature stage. The content of volatile components was high, indicating that the potential for biodegradation was large. The content of humic components in the micro-components accounted for the absolute superiority and showed good biochemical activity. Chloroform bitumen “A” extraction rate of 1.8% ~ 7.5%, is a good source rock; group composition characteristics of the Longkou lignite in the early stages of organic matter evolution, is conducive to the generation of biogas; saturated hydrocarbon carbon The distribution of number distribution indicated that the sedimentary environment formed by Longkou lignite is a weakly reduced freshwater-brackish water deep lacustrine phase, with low-level aquatic organisms mixed in its parent material. The humic acid of Longkou lignite is low in maturity and its molecular structure is aromatic To a lesser extent, its parent material is mainly derived from terrestrial vascular plants. The comprehensive analysis of the geochemical characteristics of lignite in Longkou Coalfield shows that it has a good potential for biogas generation.