Abstract: Biomarkers in Tertiary shales and oils from Subei basin were analysed by gas chromatography and gas chromatographymass spectoscopy. Correlation of biomarkers-steranes, hopanes, 4-methyl steranes, gammacerane, β-carotane, isoprenoid alkanes and methyl hopanes indicates that Ef⁴ and Ef² shales contain abundant gammacerane and have predominance of phytane. Ef⁴ shales are effective source-rock at depth of about 2750 to 3100m. Most Ef² shales have abundance of β-carotane and gammacerane and higher predominace of phytane than Ef⁴ shales, but their 4-methyl steranes content is lower. Oil from Ef² shale and having Pr/Ph〈0.5 and higher content of β-carotane and gammacerane can be expected.

摘要： 用气相色谱和色谱-质谱法分析了苏北盆地第三系泥岩和原油中的生物标记物。以甾烷、藿烷、4-甲基甾烷、伽马蜡烷、β-胡萝卜烷、类异戊二烯烷烃和甲基藿烷等生物标记物的组合对比表明,Ef⁴和Ef²泥岩富含伽马蜡烷,具有植烷优势。埋藏深度2750～3100米左右的Ef⁴泥岩是Ed-s次生油藏的生油岩,此外Ef⁴也有自生自储的油藏。Ef²泥岩普遍含有β-胡萝卜烷,Ef²泥岩较Ef⁴泥岩含更多的伽马蜡烷,具有更高的植烷优势,但4-甲基甾烷要比Ef⁴泥岩少。可期待产出与Ef²泥岩相对应的,姥鲛烷/植烷<0.5,β-胡萝卜烷和伽马蜡烷含量较高的原油。

关键词: 生物标记物, 胡萝卜烷, 苏北盆地, 伽马蜡烷, 生油岩, 生物标志物, 油源对比, 埋藏深度, 原油对比, 岩样