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现代地质 ›› 2025, Vol. 39 ›› Issue (03): 814-824.DOI: 10.19657/j.geoscience.1000-8527.2025.002

• 能源地质与工程 • 上一篇    下一篇

准噶尔盆地莫西庄地区侏罗系三工河组原油芳烃地球化学特征及油源对比

曲彦胜1,2(), 潘志强3, 何大祥3,*(), 钟宁宁1, 牛花朋1, 杨梅华2, 韩立国2   

  1. 1.中国石油大学(北京)地球科学学院,北京 102249
    2.中国石化胜利油田分公司勘探开发研究院,山东 东营 257061
    3.油气资源与勘探技术教育部重点实验室(长江大学),湖北 武汉 430100
  • 出版日期:2025-06-10 发布日期:2025-07-03
  • 通信作者: *何大祥,男,副教授,1986年出生,主要从事油气地球化学研究工作。Email:hedaxiang127@163.com
  • 作者简介:曲彦胜,男,博士研究生,1986年出生,主要从事石油地质学研究工作。Email:quyansheng@163.com
  • 基金资助:
    非常规油气省部共建协同创新中心(长江大学)开放基金项目(UOG2020-12);中石化重点攻关课题(P21077-2)

Geochemical Characteristics of Aromatics in Crude Oil and Oil-Source Correlation of the Jurassic Sangonghe Formation in Moxizhuang, Junggar Basin

QU Yansheng1,2(), PAN Zhiqiang3, HE Daxiang3,*(), Zhong Ningning1, NIU Huapeng1, YANG Meihua2, HAN Liguo2   

  1. 1. College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China
    2. Exploration and Development Research Institute of Shengli Oilfield, SINOPEC, Dongying, Shandong 257061
    3. China Key Laboratory of Exploration Technologies for Oil and Gas Resources (Yangtze University), Ministry of Education, Wuhan, Hubei 430100, China
  • Published:2025-06-10 Online:2025-07-03

摘要: 莫西庄地区为准噶尔盆地腹部勘探重点区域之一,存在三工河组原油成熟度较高、饱和烃参数失真且具体油源认识不清等问题。本次研究主要选取准噶尔盆地莫西庄地区侏罗系三工河组原油样品,对其进行地球化学实验分析,使用气相色谱-质谱技术,分析莫西庄地区三工河组原油样品芳烃化合物地球化学特征,结合正构烷烃碳、氢同位素,判断其有机质来源、成熟度、沉积环境及油源。结果表明:莫西庄地区侏罗系三工河组原油以菲系列化合物占主要优势,䓛、芘及苯并芘化合物含量相对较为丰富,高等植物来源的化合物1,2,5-三甲基萘、联苯、蒽、苝等含量较少,结合单体烃氢同位素组成特征,指示其有机质是以低等水生生物为主要生源,有少许高等植物贡献;三芴系列化合物中占一定优势的芴反映三工河组原油沉积环境以淡水沉积为主,还原性较弱;MPI-1、F1和F2等成熟度参数均显示三工河组原油热演化程度较高,处于高成熟阶段;利用聚类分析方法,结合单体烃碳同位素及部分芳烃参数对比结果,指示三工河组原油与二叠系下乌尔禾组烃源岩亲缘关系较好。该结果可为明确莫西庄地区油气成藏机理及下乌尔禾组烃源岩相关油气藏的勘探方向提供地球化学证据。

关键词: 准噶尔盆地, 莫西庄地区, 三工河组, 原油, 芳烃, 同位素, 油源对比

Abstract:

In this study, the crude oil samples of Jurassic Sangonghe Formation in Moxizhuang area were selected and analyzed by geochemical experiments. The geochemical characteristics of aromatic compounds in crude oil samples of Sangonghe Formation in Moxizhuang area were analyzed by gas chromatography-mass spectrometry. Combined with carbon and hydrogen isotopes of n-alkanes, the source, maturity and sedimentary environment of organic matter were determined. The results show that the crude oil of Jurassic Sangonghe Formation in Moxizhuang area is dominated by phenanthrene series compounds, and the contents of pyrene, benzopyrene compounds are relatively abundant. The contents of 1,2,5-trimethylnaphthalene, biphenyl, anthracene and perylene derived from higher plants are less. Combined with the characteristics of hydrogen isotope composition of monomer hydrocarbons, it indicates that the organic matter is mainly derived from lower aquatic organisms, with a little contribution from higher plants. The dominant fluorene in the three fluorene series compounds reflects that the sedimentary environment of the crude oil in the Sangonghe Formation is dominated by freshwater deposition, and the reducibility is weak. The maturity parameters such as MPI-1, F1 and F2 all show that the thermal evolution degree of crude oil in Sangonghe Formation is high and it is in the high maturity stage. By using cluster analysis method, combined with the comparison results of monomer hydrocarbon carbon isotope and some aromatic hydrocarbon parameters, it is indicated that the crude oil of Sangonghe Formation has a good genetic relationship with the source rock of Permian Lower Wuerhe Formation. The results can provide reference for the exploration and development of oil and gas resources in Moxizhuang area.

Key words: Junggar Basin, Moxizhuang area, Sangonghe group, crude oil, aromatic, isotope, oil-sourcecorrelation

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