| 鄂尔多斯盆地姬塬-西峰地区原油地球化学特征及油源分析 |
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| 引用本文： | 侯林慧,彭平安,于赤灵,张文正,张辉.鄂尔多斯盆地姬塬-西峰地区原油地球化学特征及油源分析[J].地球化学,2007,36(5):497-506. |
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| 作者姓名： | 侯林慧 彭平安 于赤灵 张文正 张辉 |
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| 作者单位： | 1. 中国科学院,广州地球化学研究所,有机地球化学国家重点实验室,广东,广州,510640
2. 中国石油天然气股份公司,长庆油田分公司,勘探开发研究院,陕西,西安,710021 |
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| 摘 要： | 采用色谱-质谱(GC-MS)、裂解-色谱-质谱(Py-GC-MS)、色谱-同位素比值质谱(GC-IRMS)等方法,系统地分析了鄂尔多斯盆地南部姬塬与西峰地区原油的地球化学特征,重新确定了原油成熟度及对应源岩的形成环境.分析表明,单体碳同位素组成偏轻,介于-30‰～-33‰之间.原油饱和烃馏分中五环三萜烷含量较高;藿烷以C30藿烷占优势,C29藿烷次之;含较高的18α(H)-30-降新藿烷(C29Ts);C30重排藿烷和伽马蜡烷含量较低;规则甾烷含量高并以C29甾烷为主,含一定的孕甾烷、升孕甾烷和重排甾烷;芳烃馏分中富含萘、菲系列化合物;沥青质裂解产物中芳基类异戊二烯烃含量很低.原油成熟度相当于镜质组反射率0.82%左右,是烃源岩在生油高峰阶段的产物.油源分析表明,该区原油主要来源于三叠系长7段泥岩,有机质形成于水体较深、淡水湖相沉积环境.
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| 关 键 词： | 原油 地球化学 生物标志物 三叠系 鄂尔多斯盆地 |
| 文章编号： | 0379-1726（2007）05-0497-10 |
| 修稿时间： | 2007-01-092007-07-10 |
Geochemical characteristics and oil-source analysis of crude oils in Jiyuan-Xifeng Oilfield, Ordos Basin |
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| HOU Lin-hui,PENG Ping-an,Yu Chi-ling,ZHANG Wen-zheng,ZHANG Hui.Geochemical characteristics and oil-source analysis of crude oils in Jiyuan-Xifeng Oilfield, Ordos Basin[J].Geochimica,2007,36(5):497-506. |
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| Authors: | HOU Lin-hui PENG Ping-an Yu Chi-ling ZHANG Wen-zheng ZHANG Hui |
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| Abstract: | Several techniques, including GC-MS, Py-GC-MS and GC-IRMS, are used to study the geochemical characteristics of crude oils in Jiyuan and Xifeng oilfields in Ordos Basin. The data shows that these oils are at mature stage and were generated in the oil window from the source rocks. The oils are isotopically light, with 813C values generally from -30%0 to -33%0. They characteristically enrich pentacyclic triterpanes, C29 steranes, pregnane and homo-pregnane, but deplete C30 diahopane and gammaeerane. The oils were mainly derived from aquatic and terrigenous organic matter. Oil and source rock analysis reflects that the oils in Jiyuan and Xifeng oilfields are typically from Triassic source rocks in Ordos Basin. |
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| Keywords: | crude oils geochemistry biomarker Triassic Ordos Basin |
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