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| Evolutive characteristics of aromatics under high pressure and temperature of deep lithosphere | |
| 作者单位： | WANG ChuanYuan（Insititute of Earthquake Science, China Earthquake Admnistration, Beijing 100036, China;Lanzhou Insititute of Geology, Chinese Academy of Sciences, Lanzhou 730000, China;Yantai Institute of Coastal Zone Research for Sustainable Development, Chinese Academy of Sciences, Yantai 264003, China） ; DU JianGuo（Insititute of Earthquake Science, China Earthquake Admnistration, Beijing 100036, China） ; DUAN Yi（Lanzhou Insititute of Geology, Chinese Academy of Sciences, Lanzhou 730000, China） ; XIE HongSen（Insititute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China） ; CHEN GuoJun（Lanzhou Insititute of Geology, Chinese Academy of Sciences, Lanzhou 730000, China） ; WANG WanChun（Lanzhou Insititute of Geology, Chinese Academy of Sciences, Lanzhou 730000, China） ; |
| 基金项目： | 科技部资助项目;国家自然科学基金 |
| 摘 要： | Pyrolysis of lignite in closed systems was conducted at temperatures from 400 to 700℃ and pressure from 1 to 3 GPa in order to investigate the evolutive characteristics of aromatics and the effects of pressure and temperature on the maturation of organic matter under the extreme conditions. The total yield of liquid hydrocarbons decreased with increasing pressure and the aromatics shows more mature with increasing temperature at a given pressure. The data indicate that high pressure significantly suppresses the thermal evolution of geological organic matter especially at lower temperature, but favors the cyclization, polymerization and aromatization of pyrolysate. The pressure effect on maturation of organic matter is nonlinear. Therefore, it can be inferred that sediment organic-matters in the subducted slab could be retained in the deep lithosphere, and the results are also significant for understanding the accumulation and preservation of petroleum in deep reservoirs. |
| 收稿时间： | 15 January 2007 |
| 修稿时间： | 28 March 2007 |
Evolutive characteristics of aromatics under high pressure and temperature of deep lithosphere |
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| Authors: | Wang ChuanYuan Du JianGuo Duan Yi Xie HongSen Chen GuoJun Wang WanChun |
| Institution: | 1. Insititute of Earthquake Science, China Earthquake Admnistration, Beijing 100036, China;Lanzhou Insititute of Geology, Chinese Academy of Sciences, Lanzhou 730000, China;Yantai Institute of Coastal Zone Research for Sustainable Development, Chinese Academy of Sciences, Yantai 264003, China 2. Insititute of Earthquake Science, China Earthquake Admnistration, Beijing 100036, China 3. Lanzhou Insititute of Geology, Chinese Academy of Sciences, Lanzhou 730000, China 4. Insititute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China |
| Abstract: | Pyrolysis of lignite in closed systems was conducted at temperatures from 400 to 700°C and pressure from 1 to 3 GPa in order to investigate the evolutive characteristics of aromatics and the effects of pressure and temperature on the maturation of organic matter under the extreme conditions. The total yield of liquid hydrocarbons decreased with increasing pressure and the aromatics shows more mature with increasing temperature at a given pressure. The data indicate that high pressure significantly suppresses the thermal evolution of geological orgnaic matter especially at lower temperature, but favors the cyclization, polymerization and aromatization of pyrolysate. The pressure effect on maturation of organic matter is nonlinear. Therefore, it can be inferred that sediment organic-matters in the subducted slab could be retained in the deep lithosphere, and the results are also significant for understanding the accumulation and preservation of petroleum in deep reservoirs. Supported by the Ministry of Science and Technology of China (Grant No. 2005DFA20980), the National Natural Science Foundation of China (Grant No. 10299045) and the Innovation Fund of Lanzhou Institute of Geology, CAS (Grant No. 2003-19-DJG) |
| Keywords: | high pressure and high temperature lignite aromatic hydrocarbon maturation isomerzation petroleum in deep reservoirs |
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