高邮凹陷韦庄地区原油吡咯类含氮化合物运移分馏效应

刘小平; 徐健

高邮凹陷韦庄地区原油吡咯类含氮化合物运移分馏效应

刘小平^{1, 2,},
徐健³

1.
石油大学盆地与油藏研究中心，北京 102249
2.
石油大学教育部石油与天然气成藏机理重点实验室.北京 102249
3.
中石化江苏油田分公司地质科学研究院，江苏扬州 225009

详细信息

作者简介:
刘小平(1971-)，男，博士后，主要从事油气成藏机理、资源评价及储层地质等方面的研究.E-mail：1xp71713@163.corn

中图分类号: P618.130
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出版历程
- 收稿日期: 2004-03-18
- 刊出日期: 2004-07-25

Migration Fractionation Effects of Pyrrolic Nitrogen Compounds of Crude Oil in Weizhuang Area, Gaoyou Sag

LIU Xiao-ping^{1, 2
,},
XU Jian³

1.
Basin & Reservoir Research Center, University of Petroleum, Beijing 102249, China
2.
Key Laboratory for Hydrocarbon Accumulation Mechanism, University of Petroleum, Ministry of Education, Beijing 102249, China
3.
Geological Science Institute of Jiangsu Oilfield, SINOPEC, Yangzhou 225009, China

摘要

摘要: 高邮凹陷韦庄地区具有正常和轻微生物降解2类原油, 对油气运移方向一直存在争议.根据2类原油中含氮化合物浓度、屏蔽型含氮化合物的相对含量与反映原油生物降解的地化参数C₂₁^-/C₂₂⁺、Pr/nC₁₇等nC₁₇物降解作用对该区原油中含氮化合物的相对含量及其分布影响不明显, 运移作用仍然是造成含氮化合物分馏的主要因素.自东向西、东北向西南方向, 韦X11井、韦6 - 2井、韦5 - 19井、韦8井原油中屏蔽型咔唑的相对含量依次增大, 分别为11.6 2 %, 10.6 6 %, 12.70 %, 13.88%;暴露型咔唑的相对含量则表现出相反的变化趋势, 分别为30.6 0 %, 2 8.5 6 %, 2 6.4 3%, 2 4.6 2 %.由此明确了本区油气自东、东北方向向西、西南方向注入, 深凹带和车逻鞍槽提供了主要油源.
- 吡咯类化合物 /
- 生物降解 /
- 油气运移 /
- 高邮凹陷
Abstract: The fractionation of pyrrolic nitrogen compounds has been applied widely on studying secondary hydrocarbon migration. As for a biodegraded crude oil, the effect of biodegradation on pyrrolic nitrogen compounds should be studied. The normal crude oil occurs in the reservoirs of Wei 2, Wei 9 and Wei 11 in Weizhuang area of Gaoyou sag, but the oil with little biodegradation occurs in reservoirs of Wei 5, Wei 6 and Wei 8. By comparison among concentration of nitrogen compounds, relative contents of pyrrolic N-H shielded carbazoles and parameters of C₂₁^-/C₂₂⁺, Pr/nC₁₇, the results show that slight biodegradation has little effects on the relative contents and distribution of pyrrolic nitrogen compounds, but has certain effect on its concentration. Hence, variation of relative contents of pyrrolic nitrogen compounds would imply the secondary migration direction of hydrocarbon. The results indicate that hydrocarbon originated from the deep depression zone and Cheluo saddle and injected westward and southwestward in Weizhuang area.
- pyrrolic nitrogen compounds /
- biodegradation /
- hydrocarbon migration /
- Gaoyou sag

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图 1 韦庄地区生物降解原油与正常原油饱和烃色谱、甾萜烷色质

Fig. 1. Saturated hydrocarbon chromatographs and sterans and trepans mass-chromatographs from normal oil and biodegraded oil in Weizhuang area

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图 2 生物降解作用对原油中性吡咯类化合物浓度及相对分布影响分析

Fig. 2. Analysis of the effect of biodegradation on relative distribution of pyrrolic nitrogen compounds in crude oils

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图 3 韦庄地区含氮化合物分布特征及其参数变化

Fig. 3. Distribution characteristics and parameters variation of pyrrolic nitrogen compounds in Weizhuang area

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图 4 韦5块含氮化合物参数变化指示的油气运移方向

Fig. 4. Hydrocarbon migration direction of Wei 5 block indicated by the parameters variation of pyrrolic nitrogen compounds

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表 1 韦庄地区原油烃类地球化学参数

Table 1. Geochemical parameters of crude oil in Weizhuang area

表 2 韦庄地区原油中性吡咯类化合物运移参数

Table 2. Migration parameters of pyrrolic nitrogen compounds of crude oil in Weizhuang area

参考文献(9)

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