煤在热演化过程中结构变化的核磁共振波谱  

^(13)C NMR Study on the Chemical Structures of Kerogen from Coal

作　　者：李岩[1,2] 王云鹏[1] 赵长毅[3] 卢家烂[1] 

机构地区：[1]中国科学院广州地球化学研究所有机地球化学国家重点实验室,广州510640 [2]中国科学院研究生院,北京100049 [3]中国石油勘探开发研究院,北京100083

出　　处：《新疆石油地质》2012年第2期175-178,共4页Xinjiang Petroleum Geology

基　　金：国家973项目(2007CB209501);国家油气专项(2011ZX05008-002-13);国家基金(40872091)资助

摘　　要：对塔里木盆地库车坳陷侏罗系阳霞组煤中的可溶有机质采用不同的抽提方法得到干酪根,并对干酪根在不同热模拟温度下的结构组成变化特征进行测定,得到核磁共振的相关数据。研究结果表明,干酪根的结构主要由三部分组成:脂族结构、芳香结构和含氧官能团。随热演化进行,脂族结构和含氧官能团不断脱落,芳香结构不断发生缩合。通过对三个系列的比较,可以得出不同的抽提方法,导致了初始状态烃类含量的不同,进而参数的变化趋势也有所不同。在热模拟过程中,随温度升高,脂族结构不断发生脱落,含氧集团因活化能较低而发生断裂,分解脱氧生成CO2和H2O,而芳核本身的性质与数量并无太大变化。The characteristic of solid 13C nuclear magnetic resonance（13C NMR） was used for the study of the chemical structures of kerogen extracted from the Yangxia coal of Jurassic in Kuqa depression of Tarim basin by different methods at different temperatures.The results indicate that the chemical composition of the kerogen is composed of aliphatic structure,aromatic structure and oxygenated functional group,among which the aliphatic structure and oxygenated functional group are gradually separated out,while the aromatic structure occurs in condensation during the thermal evolution or simulation.The comparison of the chemical structures of kerogen in three series shows that using different extraction methods may result in different hydrocarbon contents under initial state and varied tendency of 13C NMR parameter to some extent.During thermal simulation,the aliphatic structure is in seperating out,the oxygenated functional group appears to be in cracking with temperature rising,due to low activation energy,followed by producing CO2 and H2O,among which the aromatic structure is not obviously changed in property and quantity.

关 键 词：塔里木盆地 库车坳陷 煤 热演化 核磁共振 热模拟 干酪根 

分 类 号：TE112.113[石油与天然气工程—油气勘探]