| Migration Fractionation of Neutral Nitrogen Compounds of Crude Oils from Tabei Oilfield in the Tarim Basin, China |
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| 作者姓名： | 张敏 张俊 赵红静 冯敏 |
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| 作者单位： | GeochemistryResearchCenterofYangtzeUniversity,Jingzhou434023,China |
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| 基金项目： | ThisresearchprojectwasfinanciallysupportedjointlybytheState 95ScienceandTechnologyProgram (GrantNo .96 1 1 1 0 1 0 3 0 6 )andtheYouthFoundationofChinaNationalPetroleumCorporation (GrantNo .J98 0 5 ) |
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| 摘 要： | The absolute amounts and relative distributions of neutral nitrogen compounds in the Tabei oilfield (e. G. Blocks Ln1-Ln1 1) showed remarkable migration fractionation in the vertical direction. From Ordovician reservoirs (O) to oil legs TⅢ and T Ⅰ of Triassic reservoirs in blocks LN1-LN11, the concentrations of a] c] decreased from 1. 59μg/g, 0.49μg/g to 0.17 μg/g (oil). The ratios of various alkylcarbazole isomers, such as 1,8-dimethylcarbazole/nitrogenpartially shielded isomers and 1,8-dimethylcarbazole/nitrogen-exposed isomers, were adopted as the indicators of petroleum migration. The ratios increased from 0.13, 0.20 to 0.67 and from going from the south to the north of the Tabei oilfield, the absolute concentrations of neutral nitrogen compounds decreased drastically, and the nitrogen-shielded isomers were enriched relative to nitrogen-exposed isomers and nitrogen-partially shielded isomers. Crude oils in the Tabei oilfield migrated laterally from the Jilake structure to the Sangtamu fault uplift and Lunnan fault uplift, and crude oils in the same fault uplift migrated and remigrated vertically from Ordovician reservoirs, to oil legs TⅢ to TⅠ of Triassic reservoirs.
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| 关 键 词： | 含氮化合物 石油 分馏 地层学 |
| 收稿时间： | 26 October 2000 |
Migration fractionation of neutral nitrogen compounds of crude oils from Tabei oilfield in the Tarim Basin,China |
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| Zhang?Min,Zhang?Jun,Zhao?Hongjing,Feng?Min.Migration Fractionation of Neutral Nitrogen Compounds of Crude Oils from Tabei Oilfield in the Tarim Basin, China[J].Chinese Journal of Geochemistry,2004,23(1):89-93. |
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| Authors: | Zhang Min Zhang Jun Zhao Hongjing Feng Min |
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| Institution: | (1) Geochemistry Research Center of Yangtze University, 434023 Jingzhou, China |
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| Abstract: | The absolute amounts and relative distributions of neutral nitrogen compounds in-the Tabei oilfield (e. g. blocks Lnl-Lnl1)
showed remarkable migration fractionation in the vertical direction. From Ordovician reservoirs (0) to oil legs TIII and TI of Triassic reservoirs in blocks LN1-LN11, the concentrations of a] +c] decreased from 1.59 μg/g, 0.49 μg/g to 0.17 μg/
g (oil). The ratios of various alkylcarbazole isomers, such as 1,8-dimethylcarbazole/nitrogen-partially shielded isomers and
1, 8-dimethylcarbazole/nitrogen-exposed isomers, were adopted as the indicators of petroleum migration. The ratios increased
from 0. 13, 0.20 to 0.67 and from 0.42, 0.87 to 3.30, corresponding to those of Ordovician oil leg and oil legs TIII and TI. In going from the south to the north of the Tabei oilfield, the absolute concentrations of neutral nitrogen compounds decreased
drastically, and the nitrogen-shielded isomers were enriched relative to nitrogen-exposed isomers and nitrogen-partially shielded
isomers. Crude oils in the Tabei oilfield migrated laterally from the Jilake structure to the Sangtamu fault uplift and Lunnan
fault uplift, and crude oils in the same fault uplift migrated and remigrated vertically from Ordovician reservoirs, to oil
legs TIII to TI of Triassic reservoirs.
This research project was financially supported jointly by the State 95 Science and Technology Program (Grant No. 96-111-01-03-06)
and the Youth Foundation of China National Petroleum Corporation (Grant No. J98-05). |
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| Keywords: | neutral nitrogen compound migration fractionation crude oil Tarim Basin |
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