石油学报 ›› 2016, Vol. 37 ›› Issue (9): 1129-1136.DOI: 10.7623/syxb201609006

• 地质勘探 • 上一篇    下一篇

激光拉曼技术评价沉积有机质热成熟度

王民1, Li Zhongsheng2   

  1. 1. 中国石油大学非常规油气与新能源研究院 山东青岛 266580;
    2. Energy Group, Commonwealth Scientific and Industrial Research Organisation, North Ryde, Sydney, NSW 2113
  • 收稿日期:2016-01-12 修回日期:2016-06-07 出版日期:2016-09-25 发布日期:2016-09-30
  • 通讯作者: 王民,男,1981年3月生,2004年获大庆石油学院学士学位,2010年获东北石油大学博士学位,现为中国石油大学(华东)非常规油气与新能源研究院教授,主要从事油气资源评价研究工作。Email:wangm@upc.edu.cn
  • 作者简介:王民,男,1981年3月生,2004年获大庆石油学院学士学位,2010年获东北石油大学博士学位,现为中国石油大学(华东)非常规油气与新能源研究院教授,主要从事油气资源评价研究工作。Email:wangm@upc.edu.cn
  • 基金资助:

    国家自然科学基金项目(No.41402110,No.41330313)和中央高校基本科研业务费专项资金(14CX05017A,14CX02117A,14CX02224A)资助。

Thermal maturity evaluation of sedimentary organic matter using laser Raman spectroscopy

Wang Min1, Li Zhongsheng2   

  1. 1. Research Institute of Unconventional Petroleum and Renewable Energy, China University of Petroleum, Shandong Qingdao 266580, China;
    2. Energy Group, Commonwealth Scientific and Industrial Research Organisation, North Ryde, Sydney, NSW 2113, Australia
  • Received:2016-01-12 Revised:2016-06-07 Online:2016-09-25 Published:2016-09-30

摘要:

在澳大利亚联邦科学与工业研究组织能源组对激光拉曼技术评价有机质成熟度研究成果RaMM(1)和RaMM(2)的基础上,提出了可以评价沉积有机质热成熟度的激光拉曼技术新模型RaMM(P),模型使用范围为0.4%<Rr(镜质组随机反射率)<2.5% ,其具有样品量小、微区(约2 μm)无损分析、无需镜下区分不同显微组分(镜质组、惰质组)的特点。RaMM(P)模型在不同层系煤(二叠系、石炭系)、富氢煤与贫氢煤(镜质体反射率受到抑制和增强)以及海相泥岩分散有机质中的应用结果表明,该方法可以有效评价沉积有机质热成熟度,能反映镜质体反射率异常的问题;同时将RaMM(P)与RaMM(1)和RaMM(2)方法进行了对比讨论。该方法在沉积分散有机质热成熟度评价,尤其是镜质体缺少/缺失或镜质体反射率受到抑制或镜质体识别困难的沉积地层具有广阔的应用前景。

关键词: 拉曼光谱, 分散有机质, 热成熟度, 镜质体, 惰质体

Abstract:

Based on RaMM (1) and RaMM (2), which are the findings from a research conducted by the energy group of Commonwealth Scientific and Industrial Research Organization (CSIRO), this paper proposes a new technical model RaMM (P), of which the vitrinite random reflectivity is within the range of 0.4% to 2.5%, to evaluate the thermal maturity of sedimentary organic matter using laser Raman spectroscopy. RaMM (P) is characterized by small quantity of demanded samples, non-destructive analysis of micro-zone (around 2 μm), and no need to discriminate microscopic macerals (vitrinite or inertinite). RaMM (P) model is applied in researches of different coal series (Permian and Carboniferous), perhydrous and subhydrous coals (the suppression or enhancement of vitrinite reflectivity), and dispersed organic matter (DOM) in marine mudstone. Results show that RaMM (P) can effectively evaluate the thermal maturity of DOM and identify abnormal vitrinite reflectivity. In addition, this paper also performs a comparative analysis on RaMM (1), RaMM (2) and the proposed model RaMM (P). The RaMM (P) model has a broad application prospect in thermal maturity evaluation of DOM, especially for the sedimentary strata with little or no vitrinite, or for those which are difficult to recognize due to the suppression of vitrinite reflectivity.

Key words: Raman spectral, dispersed organic matter, thermal maturity, vitrinite, inertinite

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