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现代地质 ›› 2019, Vol. 33 ›› Issue (03): 629-642.DOI: 10.19657/j.geoscience.1000-8527.2019.03.15

• 石油地质学 • 上一篇    下一篇

东濮凹陷原油含硫化合物的分布特征及其应用

徐田武1(), 李素梅2,3(), 张洪安1, 张云献1, 吴建勋4, 史权4, 陈湘飞3, 纪红3, 万中华3   

  1. 1.中国石化中原油田分公司,河南 濮阳 457001
    2.油气资源与探测国家重点实验室(中国石油大学(北京)) 北京 102249
    3.中国石油大学(北京) 地球科学学院,北京 102249; 中国石油大学(北京) 重质油国家重点实验室,北京 102249
  • 收稿日期:2018-11-15 修回日期:2018-12-20 出版日期:2019-06-23 发布日期:2019-06-24
  • 通讯作者: 李素梅
  • 作者简介:李素梅,女,研究员,1968年出生,有机地球化学专业,主要从事油气地质地球化学研究工作。Email: smli@cup.edu.cn
    徐田武,男,博士,1981年出生,地质学专业,主要从事油气地质科研生产工作。Email: 359329306@qq.com
  • 基金资助:
    国家自然科学基金项目(41673055);国家自然科学基金项目(41473047);国家自然科学基金项目(41773038);国家科技重大专项(2016ZX05006-004)

Characteristics and Significance of Organic Sulfur Compounds in the Crude Oils from the Dongpu Sag

XU Tianwu1(), LI Sumei2,3(), ZHANG Hongan1, ZHANG Yunxian1, WU Jianxun4, SHI Quan4, CHEN Xiangfei3, JI Hong3, WAN Zhonghua3   

  1. 1. SINOPEC Zhongyuan Oilfield Company,Puyang, Henan 457001, China
    2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
    3. Geosciences Institute, China University of Petroleum, Beijing 102249, China
  • Received:2018-11-15 Revised:2018-12-20 Online:2019-06-23 Published:2019-06-24
  • Contact: LI Sumei

摘要:

东濮凹陷盐湖相原油中杂原子化合物研究薄弱。采用高分辨率质谱结合色谱-质谱技术,对东濮凹陷盐湖相、淡水湖相原油中的含硫化物进行了检测。结果表明,原油中含有丰富的含硫化合物, S1和O1S1占绝对优势,咸水相原油富含S1类、淡水相原油相对富集O1S1类,指示O1S1/S1具有原始沉积环境指示意义。东濮盐湖相原油中的硫化物富含碳数为C27-35、C40的化合物,与原油中丰富的甾类、藿烷类与β-胡萝卜类化合物碳数相吻合,指示菌藻类、色素类生源的重要贡献。随成熟度增加,硫化物缩合度增加、烷基侧链碳数范围降低,相关参数DBE6/DBE12-S1、DBE3+6/$DBE_{12+15+18}$-S1等可用于辅助评价原油成熟度。东濮低熟油含有丰富的低热稳定性硫化物,指示富硫干酪根和/或富硫大分子低温降解是低熟油形成的重要机制之一。

关键词: 东濮凹陷, 盐湖相原油, 硫化物, 高分辨率质谱

Abstract:

Heteroatomic compounds in saline lacustrine in the Dongpu Sag are weakly documented. ESI FT-ICR MS combined with GC/MS were utilized to reveal sulfur compounds in the saline and freshwater lacustrine oils in the sag. Abundant sulfur compounds were detected and dominated by S1 and O1S1 class species. It was observed that the saline lacustrine oils are relatively enriched in S1 species while the freshwater lacustrine oils are abundant in O1S1 species, indicating the ratio of O1S1/S1 is indicative of organofacies of source rocks. The saline lacustrine immature oils are composed of mainly sulfur compounds with carbon number to be C27-C35 and C40,which is coincide with the carbon number of steroids, hopanoids and β-carotane, suggesting micro-organisms such as algas and bacterium as well as chromatophore to be important organic matter inputs when source rocks deposited. With increasing maturity, the DBE (double bond equivalent) values increased whereas the carbon number range of alkyl substitued decreased, and several relevant parameters were suggested to be maturity indicative. The saline immature oils are dominated by sulfur compounds with relatively low thermal stability, suggesting degradation of S-containing kerogen and/or sulfurous macromolecule under low temperature is one of the most important genetic mechanisms of immature oils in the area studied.

Key words: Dongpu Sag, saline lacustrine oil, sulfur compounds, high resolution mass

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