Molecular and carbon isotopic geochemistry of oils with different fluorescence color from the Upper Jurassic Qigu formation and oil accumulation process in Yongjin area, Junggar Basin in China
文献类型：期刊论文
| 作者 | Zhang, Hongrui1,2; Liu, Hua1; Jia, Wanglu2; Tian, Hui2; Li, Jinbu2; Yu, Shuang2 ; Qu, Yansheng3; Meng, Xiangyu1
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| 刊名 | MARINE AND PETROLEUM GEOLOGY
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| 出版日期 | 2025 |
| 卷号 | 171页码:23 |
| 关键词 | Sequential extract C -isotope Mixed oil separation Biodegradation Oxidation Oil source correlation Multi-period oil charging |
| ISSN号 | 0264-8172 |
| DOI | 10.1016/j.marpetgeo.2024.107163 |
| 英文摘要 | The Yongjin area, located in the middle of the Junggar Basin, is an important oil-producing region. Its major oilproducing formation is the Upper Jurassic Qigu Formation, which has experienced multiple oil-charging events that have resulted in oils with various fluorescent colors. However, the source of oils from the Qigu Formation is currently debated. As exploration and development progressed, the productivity of the Qigu Formation was observed to vary owing to oil viscosity differences. Conventional extraction methods can only be used to obtain a mixture of fluorescing oils of different colors, making it difficult to analyze the properties of oils that charge during different periods. Using microscopy to observe fluorescence the characteristics of oil in various samples were analyzed. Then, accelerated sequential extraction was used to separate the oils with different fluorescent colors (Groups I-IV). Through GC-MS (gas chromatography), GC-IRMS (gas chromatography-mass spectrometry), FT-IR (fourier transform infrared spectroscopy), and fluid inclusion observations and measurements, in conjunction with the geological context, the sources of oils from different charge periods and genesis of heavy oil were determined and the process of oil accumulation was reconstructed. Three stages of oil charging were identified: (1) During the Middle to Late Jurassic, low-mature and mature oil from the Lower Permian Fengcheng Formation and a low quantity of low-mature oil from the Middle Permian Lower Wuerhe Formation charged the Qigu Formation. These oils underwent notable biodegradation and oxidation, with some captured by inclusions (Group III) for preservation. (2) During the Late Cretaceous to Early Paleogene, mature oil from the Wuerhe Formation charged the Qigu Formation. This oil mixed with early oil that was not captured by the inclusions, resulting in the formation of black-brown fluorescing oil (Group IV) and yellow fluorescing inclusion oil (Group II). (3) From the Late Paleogene to the present, highly mature condensates from the Lower Wuerhe Formation charged the Qigu Formation. The oil mixed with early oil to generate yellow-brown (Group II) and blue-white (Group I) fluorescing oils. Low-mature and mature oil from the Fengcheng Formation charged the Jurassic reservoirs and underwent secondary alteration, whereas high-mature oil and gas did not. These oils likely predominantly accumulated in reservoirs between the Fengcheng and Lower Wuerhe formations. Although the Jurassic source rocks began to generate oil, this oil did not migrate upward to the Qigu Formation, indicating that the conventional and unconventional reservoirs under the Jurassic Qigu Formation have exploration potential. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001350861600001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/82082]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Liu, Hua |
| 作者单位 | 1.China Univ Petr East China, Sch Geosci, Qingdao 266580, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Ctr Excellence Deep Earth Sci, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 3.Shengli Oilfield Co, Explorat & Dev Res Inst, SINOPEC, Dongying 257015, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Hongrui,Liu, Hua,Jia, Wanglu,et al. Molecular and carbon isotopic geochemistry of oils with different fluorescence color from the Upper Jurassic Qigu formation and oil accumulation process in Yongjin area, Junggar Basin in China[J]. MARINE AND PETROLEUM GEOLOGY,2025,171:23. |
| APA | Zhang, Hongrui.,Liu, Hua.,Jia, Wanglu.,Tian, Hui.,Li, Jinbu.,...&Meng, Xiangyu.(2025).Molecular and carbon isotopic geochemistry of oils with different fluorescence color from the Upper Jurassic Qigu formation and oil accumulation process in Yongjin area, Junggar Basin in China.MARINE AND PETROLEUM GEOLOGY,171,23. |
| MLA | Zhang, Hongrui,et al."Molecular and carbon isotopic geochemistry of oils with different fluorescence color from the Upper Jurassic Qigu formation and oil accumulation process in Yongjin area, Junggar Basin in China".MARINE AND PETROLEUM GEOLOGY 171(2025):23. |
入库方式： OAI收割
来源：广州地球化学研究所
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