三塘湖盆地中二叠统芦草沟组油页岩热重特性及影响因素  

Thermogravimetric characteristics and its influencing factors of oil shales in Middle Permian Lucaogou Formation in Santanghu Basin,NW China

作　　者：陈贵标 徐银波 CHEN Guibiao;XU Yinbo(Kunming Engineering Corporation Limited,PowerChina,Kunming 650051,China;Oil and Gas Survey,China Geology Survey,Beijing 100083,China;College of Earth Sciences,Jilin University,Changchun 130061,China)

机构地区：[1]中国电建集团昆明勘测设计研究院有限公司,昆明650051 [2]中国地质调查局油气资源调查中心,北京100083 [3]吉林大学地球科学学院,长春130061

出　　处：《世界地质》2024年第3期403-412,共10页World Geology

基　　金：中国地质调查局项目(DD20230325、DD20242509);国家自然科学基金项目(41772092、52374010)。

摘　　要：为了研究油页岩加热过程中的热重特性和热解过程及其影响因素,对三塘湖盆地芦草沟组油页岩的含油率、总有机碳、热解、主量元素和热重分析等进行测试。结果显示,三塘湖盆地芦草沟组油页岩为具有较高有机质丰度、高灰分和中等发热量的中等品质油页岩,且灰分主要元素组成为SiO_(2)、Al_(2)O_(3)、CaO,属于高熔灰分。油页岩热重分析显示其热解过程主要为低温、中温和高温失重段3个阶段,中温失重段为油页岩主要失重段和油页岩热解反应阶段,温度范围为300~580℃。其中油页岩热解过程中油气大量生成阶段的温度范围为430~500℃,为油页岩热解过程中生油关键阶段,而500~580℃为页岩气生成阶段,可以形成一定量的页岩气。In order to study the thermogravimetric characteristics,pyrolysis process and its influencing factors of oil shales during heating,the oil yield,total organic carbon,pyrolysis,major elements and thermogravimetric analysis of oil shales from the Lucaogou Formation in Santanghu Basin were tested.The results show that oil shales from the Lucaogou Formation in Santanghu Basin are medium quality oil shales with high organic matter abundances,high ash contents and medium calorific values.The main elements of ashes are SiO_(2),Al_(2)O_(3) and CaO,which belong to high melting ashes.Thermogravimetric analysis of oil shale shows that the pyrolysis process is mainly divided into three stages,including low temperature,medium temperature and high temperature weight loss stages.The medium temperature weight loss stage is the main weight loss stage and pyrolysis reaction stage of oil shales,with the temperature of 300-580℃.Among them,the temperature of large amount of oil and gas generation stage in oil shale pyrolysis process is 430-500℃,which is the key stage of oil generation.While 500-580℃is the gas generation stage,which can form a certain amount of shale gas.

关 键 词：油页岩 热重分析 热解 芦草沟组 三塘湖盆地 

分 类 号：P618.12[天文地球—矿床学]