Pyrolysis-Gas Chromatography of the Oil Shale in Lucaogou Formation, Dahuangshan, Southern Junggar Basin

详细信息   

• 责任者：Li Jingjing （China University of Geosciences ; Beijing 100083 ; China） ; Tang Dazhen
• 刊名：Petroleum Exploration and Development
• 出版年：2008
• 卷期：35(6)
• 关键词：气相色谱法 ; gas chromatography ; 油页岩 ; oil shale ; 准噶尔盆地 ; Junggar Basin
• 页码：p.674-679
• 图表：11 illus., 2 tables, 17 refs.
• 分类号：1003
• issnNo：ISSN1000-0747
• isbnNo：CN11-2360/TE

摘要

///Dahuangshan oil shale mine is located at the main position of oil shale deposit belt in Northern Bogda Mountain. The majority of the pyrolysis products of Dahuangshan oil shale are n-alkanes and n-alkenes, which approximately account for 90% of total products. Aliphatic groups break from kerogen nuclear when heated and turn into alkyl radicals. Alkyl radicals, which are very active, quickly turn into n-alkanes or n-alkenes depending on capturing or losing hydrogen radicals. Due to the effect of space steric hindrance, the formation of n-alkenes need more energy than n-alkanes, and the formation ratio of short chain n-alkenes (C₁₄^-) is bigger than long chain n-alkenes (C₁₅⁺). The relative contents of C₁—C₄ n-alkanes and n-alkenes, C₅—C₁₄ n-alkanes and n-alkenes, and C₁₅⁺ n-alkanes and n-alkenes are effective parameters to distinguish kerogen type,as proved. Also the composition ratio of all n-alkanes and all n-alkenes is also an accurate parameter, for the type -Ⅰ kerogen is below 2.17 while the type-Ⅱ is above it.