塔里木盆地北部哈拉哈塘凹陷海相油气特征与成因

孙浩; 李素梅; 张宝收

doi:10.11781/sysydz201506704

塔里木盆地北部哈拉哈塘凹陷海相油气特征与成因

doi: 10.11781/sysydz201506704

孙浩^1,2,
李素梅^1,2, ,,
张宝收³

1.
中国石油大学油气资源与探测国家重点实验室, 北京 102249
2. 中国石油大学地球科学学院, 北京 102249
3. 中国石油塔里木油田分公司勘探开发研究院, 新疆库尔勒 841000

基金项目: 国家自然科学基金(40973031,41473047)、国家重点基础研究发展计划(973计划)项目(2011CB201102)、教育部高等学校博士点专项基金(20120007110002)和油气资源与探测国家重点实验室基金(PRP/indep-1-1101,PRP2009-02)资助。

详细信息

作者简介:
孙浩(1987—),男,博士研究生,研究方向为有机地球化学。E-mail:mouse_sun8@hotmail.com

通讯作者:
李素梅(1968—),女,教授,研究方向为油气地质地球化学。E-mail:smli@cup.edu.cn

中图分类号: TE122.1
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- 被引次数: 0
出版历程
- 收稿日期: 2015-01-26
- 修回日期: 2015-10-19
- 刊出日期: 2015-11-28

Characteristics and genesis of marine hydrocarbons in the Halahatang Sag in the northern Tarim Basin

Sun Hao^1,2,
Li Sumei^{1,2
, ,},
Zhang Baoshou³

1.
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
2. College of Geosciences, China University of Petroleum, Beijing 102249, China
3. Research Institute of Exploration and Development, PetroChina Tarim Oilfield Company, Korla, Xinjiang 841000, China

摘要

摘要: 哈拉哈塘凹陷作为塔北隆起西部的重要油气单元,其奥陶系碳酸盐岩储层中油气资源丰富,但呈现多相态分布,油气性质变化成因尚不明确。通过详细的地球化学分析揭示了该区油气特征与成因。油-油、油-岩对比表明,原油与中-上奥陶统烃源岩特征更为相近,指示具有成因联系;正构烷烃单体烃碳同位素对比显示,可能有寒武系烃源岩的成烃贡献。哈拉哈塘原油具有相对较高的硫芴含量,C₂₉和C₃₅藿烷相对含量也较高,暗示有碳酸盐岩烃源岩的成烃贡献。傅里叶变换离子回旋共振质谱(FT-ICR MS)分析表明,哈拉哈塘地区原油中低热稳定性硫化物含量不高,表明当前没有明显的TSR改造迹象。综合分析认为,源岩成熟度是控制深部高气油比原油形成的重要因素,而生物降解等次生作用是控制相对浅层重质油和H₂S形成的重要因素。
- 生物标志物 /
- 单体烃碳同位素 /
- 高分辨率质谱 /
- 油源对比 /
- 油气成因 /
- 哈拉哈塘凹陷 /
- 塔里木盆地
Abstract: The Halahatang Sag is an important oil and gas unit in the western part of the Northern Tarim Uplift. The Ordovician carbonate reservoir contains abundant petroleum resources with multiple phases, but the variable characteristics and genetic mechanism of the oil and gas are still unclear. Oil-oil and oil-rock correlations indicate that the crude oil has a close genetic relationship with the middle and upper Ordovician source rocks. The comparison of carbon isotopes for individual n-alkanes shows that the Cambrian source rocks might also contribute. Halahatang oils are rich in dibenzothiophenes, and also contain relatively abundant C₂₉-and C₃₀-hopane, which implies a contribution from carbonate source rocks. Based on the Fourier transform-ion cyclotron resonance mass spectrometry (FT-ICR MS) analysis, sulfides with low thermal stability have low concentrations, suggesting that TSR alteration is not significant. Source rock maturity is the major factor controlling the genesis of oils with high gas/oil ratios, while biodegradation is the major factor for heavy oil and H₂S formation in the relatively shallow reservoir.
- biomarkers /
- individualn-alkanes carbon isotope /
- high resolution mass spectrometry /
- oil and source correlation /
- hydrocarbon origin /
- Halahatang Sag /
- Tarim Basin

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