• 责任者：Song Zhenxiang (Wuxi Research Institute of Petroleum Geology ; SINOPEC ; Wuxi 214151 ; China) ; Zhou Shixin
• 刊名：Petroleum Geology & Experiment
• 出版年：2011
• 卷期：33(2)
• 关键词：正烷烃 ; n-alkanes ; 烃源岩 ; source rocks ; 柴达木盆地 ; Qaidam Basin
• 页码：p.182-187,192
• 图表：6 illus., 25 refs.
• 分类号：1003
• issnNo：ISSN1001-6112
• isbnNo：CN32-1151/TE

The n-alkane distribution of crude oils from the western Qaidam Basin is characterized by even-to-odd (C₁₈-C₂₈) predominance. Source rocks from the region are mainly characterized by odd-to-even predominance. Based on n-alkane distribution pattern, combined with single molecule carbon isotope analysis, comparing crude oil with source rock, it was discussed in this paper the main source rocks in the western Qaidam Basin. The correlation of n-alkane distribution and single molecule carbon isotope analysis illustrated that the chief hydrocarbon source layer was E₂₊₃ and the secondary layers were E₁₊₂ and E₁₊₃ in deep region. Meanwhile, the chief hydrocarbon source layer was N1 and the secondary layer was N₂ in shallow region. Hydrocarbon potential analysis showed that those samples with even-to-odd(C₁₈-C₂₈) predominance possessed higher TOC, bitumen "A", total hydrocarbon content and conversion ratio, displaying huge hydrocarbon generating potential.