下马岭组油页岩热模拟实验抽提物中三芴系列化合物演化特征  

Evolution characteristics of trifluorene compounds in the extracts of oil shale of Xiamaling Formation by thermal simulation test

作　　者：杨娟 王作栋[2] 薄海波 张婷[2,3] 吉生军 王静莹 Yang Juan;Wang Zuo-dong;Bo Hai-bo;Zhang Ting;Ji Sheng-jun;Wang Jing-ying(Department of Chemistry,Qinghai Normal University,Xining 810008,China;Key Laboratory of Petroleum Resources,Chinese Academy of Sciences,Lanzhou 730000 China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]青海师范大学化学化工学院,青海西宁810008 [2]中国科学院油气资源研究重点实验室,甘肃兰州730000 [3]中国科学院大学,北京100049

出　　处：《天然气地球科学》2019年第7期1063-1071,共9页Natural Gas Geoscience

基　　金：国家自然科学基金项目“地质条件下温度对甾烷的形成和分布的影响研究”(编号:41772133);中国科学院仪器设备功能开发技术创新项目“GCMA快速热分离进样装置的研发”(编号:2019g106);中国科学院地质与地球物理研究所兰州油气资源研究中心“十三五”创新基金课题(编号:135CCJJ20160523)联合资助

摘　　要：对华北张家口中元古界下马岭组低熟海相页岩进行温压模拟实验,并对原始样品和模拟后的残渣抽提物做了GC/MS分析,讨论了2种温压模式下三芴系列化合物(以下简称"三芴")的演化规律.结果表明,三芴的相对含量受温度影响,且压力在不同温度条件下对三芴含量也有较大影响.主要表现在以下方面:①随着温度升高、压力增大,呈现出F的相对含量增大、OF含量减小、SF含量无明显变化的规律,三芴相对丰度表现出F>OF>SF特征;②温度低于390℃时,温压共同作用比单一温度作用更易使有机质进入成熟阶段;③温度低于337℃时,加压抑制了共轭烯键的芳构化;温度高于337℃时,加压促进了共轭烯键芳构化;在327~450℃温度范围内,硫芴表现出较好的热稳定性;④随着温度的升高,模拟实验样品的成熟度从未成熟演化到成熟晚期,三芴含量的原始比例构成发生了较大变化,故利用三芴相对含量判断有机质沉积环境时,要考虑温度对三芴相对含量变化的影响.Temperature-pressure simulating experiment was conducted for the low mature marine shale samples from the Cambrian Xiamaling Formation in the middle Proterozoic in Zhangjiakou of North China,then GC/MS was applied to analyze the original samples and the residue collected from the simulating test in the experiments.The results show that the relative content of trifluorene is affected by temperature,and the pressure has great effect on the content of trifluorene under different temperature conditions.It is reflected in the following aspects:(1)With the increase of temperature and pressure,the relative content of F increases,the content of OF decreases,and the SF content has no obvious changes.The relative abundance of trifluorene showed the characteristic of F>OF>SF;(2)When the temperature is lower than 390℃,the interaction of temperature and pressure can make organic matter into mature stage more easily than that of single temperature;(3)When the temperature is lower than 337℃,the aromatization of conjugated olefinic bond is inhibited by pressure;when the temperature is higher than 337℃,it is the opposite,in 327-450℃temperature range,dibenzothiophene show good thermal stability;(4)With the increase of temperature,the maturity of the simulated sample never evolved to the lately mature,and the original proportion of trifluorene content changed greatly.Therefore,when the relative content of trifluorene was used to judge the organic matter sedimentary environment,the effect of temperature on the relative content of trifluorene should be considered.

关 键 词：三芴 下马岭组 温压模拟实验 低熟海相页岩 

分 类 号：TE122.1[石油与天然气工程—油气勘探]