| 塔里木盆地原油氮同位素地球化学初步研究 |
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| 引用本文： | 陈传平,梅博文. 塔里木盆地原油氮同位素地球化学初步研究[J]. 天然气地球科学, 2004, 15(2): 178-181 |
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| 作者姓名： | 陈传平 梅博文 |
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| 作者单位： | 长江大学地球化学系,湖北,荆州,434023 |
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| 基金项目： | 国家自然科学基金项目(编号:49673181)资助. |
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| 摘 要： | 采用Kjeldahl硫酸消煮法制备了塔里木盆地部分干酪根和原油的氮同位素样品并测定了相关比值,结果显示,油―源的δ15N值之间有一定可比性并随时代和区域不同而变化:塔中奥陶系原油样品的δ15N值最低(多小于1‰);塔北中生界原油样品δ15N值略高,大致在-1‰～1‰之间);库车坳陷原油样品δ15N值较高,但有3种不同情况,一是牙哈构造带原油的δ15N值分布有较大离散度(最大为18.11‰,最小为2.77‰),差值高达15.34‰,二是YH5井奥陶系原油的δ15N值明显低于同一井上覆第三系原油的该值,暗示该井有两种不同源岩的原油发生了部分混合,三是轮南14井不同层位的原油δ15N值在纵向上自下而上逐渐降低,初步表明不同层位的油气发生了垂向运移。
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| 关 键 词： | 塔里木盆地 原油 氮同位素 油源对比 油气运移 |
| 文章编号： | 1672-1926(2004)02-0178-04 |
ELEMENTARY RESEARCH ON OIL NITROGEN ISOTOPIC-GEOCHEMISTRY IN TARIM BASIN |
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| CHEN Chuan-ping,MEI Bo-wen. ELEMENTARY RESEARCH ON OIL NITROGEN ISOTOPIC-GEOCHEMISTRY IN TARIM BASIN[J]. Natural Gas Geoscience, 2004, 15(2): 178-181 |
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| Authors: | CHEN Chuan-ping MEI Bo-wen |
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| Abstract: | Nitrogen isotopic samples of oils in Tarim basin were prepared with Kjeldahl method and the ratios were measured. The results show that δ~(15)N values of oil and source rock can be correlated but vary with geological age and different tectonic zones. Oil δ~(15)N in Tazhong zone is lowest with most values below 1‰; it has some higher value in Tabei zone but still near zero on the whole. Whereas the δ~(15)N distribution in Kuche zone is discrete with value maximum 18.11‰ and minimum 2.77‰,the difference being... |
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| Keywords: | Tarim basin Crude oil Nitrogen isotopic geochemistry Oil-source correlation Hydrocarbon migration. |
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