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| 柴达木盆地尕斯库勒油田原油饱和烃地球化学特征及成因研究 | |
| 引用本文： | 莫晓靥,张敏,张俊. 柴达木盆地尕斯库勒油田原油饱和烃地球化学特征及成因研究[J]. 天然气地球科学, 2011, 22(5): 848-853. DOI: 10.11764/j.issn.1672-1926.2011.05.848 |
| 作者姓名： | 莫晓靥 张敏 张俊 |
| 作者单位： | 1.长江大学地球化学系,湖北 荆州 434023; 2.长江大学油气资源与勘探技术教育部重点实验室,湖北 荆州 434023; 3.中国石油化工股份有限公司科技部,北京 100728 |
| 基金项目： | 国家自然科学基金项目(编号:40973041)资助 |
| 摘 要： | 尕斯库勒油田是柴达木盆地最大的油田，通过GC|MS分析技术，系统剖析了尕斯库勒油田原油的地球化学特征。研究结果表明：正构烷烃呈偶奇优势,其中浅部油藏中有部分原油正构烷烃缺乏，遭受到轻度的生物降解。对于正常原油，均具有较低的姥植比，同时具有含量丰富的伽马蜡烷和C35升藿烷，揭示了原油形成于强还原咸水环境，对比深部E13油藏和浅部N1-N12油藏，浅部油藏的成油环境的古盐度略低于深部油藏；原油中C21-/C22+值在1.02~1.71之间，且具有高含量的C27甾烷，指示了其母质来源以菌藻类低等水生生物为主；原油中C29αββ/（αββ+ααα）值以及Ts/Tm值都较低，都表现出了低熟油的特征，同时C2920S/（20S+20R）值普遍偏低，在深部E13油藏该值分布在0.31~0.40之间，而在浅部N1-N12油藏该值相对较低，分布在0.29~0.36之间，深部油藏的成熟度略高于浅部油藏。 |
| 关 键 词： | 柴达木盆地 尕斯库勒油田 原油 饱和烃 地球化学特征 |
| 收稿时间： | 2010-04-01 |
Geochemical Characteristics of Saturated Hydrocarbon and Its Genesis in Hure Oilfield of Western Qaidam Basin |
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| MO Xiao-ye,,ZHANG Min,ZHANG Jun. Geochemical Characteristics of Saturated Hydrocarbon and Its Genesis in Hure Oilfield of Western Qaidam Basin[J]. Natural Gas Geoscience, 2011, 22(5): 848-853. DOI: 10.11764/j.issn.1672-1926.2011.05.848 | |
| Authors: | MO Xiao-ye ZHANG Min ZHANG Jun |
| Affiliation: | 1.Department of Geochemistry,Yangtze University,Jingzhou 434023,China； 2.Key Laboratory of Exploration Technologies for Oil and Gas Resoureces,Ministry of Education, Yangtze University,Jingzhou 434023,China;3.Department of Technology,SINOPEC,Beijing 100728,China |
| Abstract: | Hure oilfield is the biggest oil field in the Qaidam basin.In this paper,we comprehensively integrate the geochemical characteristics of saturated hydrocarbon by means of GC-MS analysis.The results show that the crude oil has even-odd carbon predominance for n-alkanes,where biogenicdegradation of crude oil in the shallow reservoir caused the absence of part of n-alkane serials.The normal oil has low Pr/Ph ratios,abundance of gammacerane and C35 homohopane,indicating that the crude oil was formed in strongly... |
| Keywords: | Qaidam basin Hure oilfield Crude oil Saturated hydrocarbon Geochemical characteristic. |
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