| 烃源岩中可溶有机质的FTIR地球化学意义探讨——以准噶尔盆地下二叠统风城组为例 |
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| 引用本文： | 何沐飞, 张景坤, 米巨磊, 陈俊, 胡凯, 曹剑. 烃源岩中可溶有机质的FTIR地球化学意义探讨——以准噶尔盆地下二叠统风城组为例[J]. 石油实验地质, 2021, 43(6): 1048-1053. doi: 10.11781/sysydz2021061048 |
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| 作者姓名： | 何沐飞 张景坤 米巨磊 陈俊 胡凯 曹剑 |
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| 作者单位： | 1.南京大学 地球科学与工程学院, 南京 210023;;2.中国石油 新疆油田分公司 实验检测研究院, 新疆 克拉玛依 834000 |
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| 基金项目： | 国家自然科学基金青年基金（42102148）、中国博士后科学基金（2021M691497）和江苏省博士后科研资助计划（2021K216B）联合资助。 |
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| 摘 要： | 为进一步拓展显微傅里叶红外光谱（FTIR）技术在有机地球化学研究中的应用，以准噶尔盆地下二叠统风城组碱湖相含油气系统为例，开展了沉积有机质的生烃研究。结果表明，7组红外官能团具有指征意义，并据此提出3个红外结构新参数，即A指数（A2 920/A3 600）、B指数（A2 920/A1 460）和C指数（A1 140/A1 600）。A指数揭示盐岩区烃源岩具有更高的生烃潜力，B指数揭示可能存在热液流体影响导致盐岩区有机质具有异常的热演化，而C指数表明从边缘区到盐岩区，随盐度的升高，有机质的分子聚合受到影响。据此，位于沉积中心的盐岩区油气勘探潜力较大，尽管在深层可能仍存在轻质原油。这些认识为区域油气勘探提供了新的参考资料，展示了FTIR技术能为传统的有机地球化学研究提供补充，具有广阔的应用潜力。
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| 关 键 词： | 显微傅里叶红外光谱(FTIR) 沉积有机质 生烃潜力 碱湖 风城组 准噶尔盆地 |
| 收稿时间： | 2021-04-27 |
| 修稿时间： | 2021-08-26 |
Organic geochemical study of FTIR analysis on source rock extracts: a case study of Lower Permian Fengcheng Formation in Junggar Basin,NW China |
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| HE Mufei, ZHANG Jingkun, MI Julei, CHEN Jun, HU Kai, CAO Jian. Organic geochemical study of FTIR analysis on source rock extracts: a case study of Lower Permian Fengcheng Formation in Junggar Basin, NW China[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2021, 43(6): 1048-1053. doi: 10.11781/sysydz2021061048 |
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| Authors: | HE Mufei ZHANG Jingkun MI Julei CHEN Jun HU Kai CAO Jian |
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| Affiliation: | 1. School of Earth Sciences and Engineering, Nanjing University, Nanjing, Jiangsu 210023, China;;2. Research Institute of Experiment and Testing, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China |
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| Abstract: | To discover the values of Fourier Transform Infrared Spectroscopy (FTIR) in the research of organic geochemistry, hydrocarbon generation features of source rocks of Lower Permian Fengcheng, Junggar Basin were studied by the means of FTIR analysis on the extracts. Seven FTIR functional groups appeared to have indicative significance, based on which three new index were proposed, including A index (A2 920/A3 600), B index (A2 920/A1 460), and C index (A1 140/A1 600). Specifically, A index unraveled a higher hydrocarbon generation potential of the source rocks located in saline areas, B index indicated that the possible hydrothermal fluid injection have caused the abnormal thermal evolution of organic matter in saline source rocks, and C index showed that an increasing salinity from marginal zone to saline zones has affected to the organic molecular polymerization in the Fengcheng Formation source rocks. Based on that, the saline zone located at the center of Fengcheng Formation deposition has great potential for oil-gas exploration, particularly for light oils in the deep reservoirs. These understandings provided new references for the regional oil-gas exploration and pointed out that FTIR can supplement traditional organic geochemistry, displaying a broad application potential. |
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| Keywords: | Fourier Transform Infrared Spectroscopy (FTIR) sedimentary organic matter hydrocarbon generation potential alkaline lacustrine Fengcheng Formation Junggar Basin |
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