| 库车坳陷煤成甲烷碳同位素动力学研究 |
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| 引用本文： | 李贤庆,肖贤明,Tang Y,米敬奎,申家贵,肖中尧,包建平,熊波.库车坳陷煤成甲烷碳同位素动力学研究[J].石油与天然气地质,2004,25(1):21-25. |
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| 作者姓名： | 李贤庆 肖贤明 Tang Y 米敬奎 申家贵 肖中尧 包建平 熊波 |
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| 作者单位： | 1. 长江大学地球化学系,湖北荆州 434023;
2. 中国科学院广州地球化学研究所有机地球化学国家重点实验室,广东广州 510640;
3. 美国加州理工学院石油能源与环境研究中心,美国加州 91789;
4. 湖南科技大学土木工程系,湖南湘潭 411201;
5. 中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒 841000 |
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| 基金项目： | 中国博士后科学基金 (2 0 0 2 03 12 82 )，国家“十五”重点科技攻关项目 (20 0 1BA60 5A0 2 0 3 0 1)，中国科学院知识创新工程项目(KZCX 2 110 )联合资助 |
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| 摘 要： | 应用黄金管封闭体系热解实验,结合GCIRMS同位素质谱仪的甲烷碳同位素分析,研究了塔里木盆地库车坳陷侏罗系煤生成甲烷的碳同位素特征及其动力学模拟。结果表明,库车坳陷侏罗系煤热解气甲烷碳同位素介于-36%～-25%;碳同位素与热解温度(或Ro)、升温速率密切相关;煤成甲烷的碳同位素动力学模拟结果与热解实验数据吻合较好,表明可以用动力学方法将实验数据外推,并应用于地质实际中。模拟结果显示,库车坳陷克拉2气田天然气主要经历了10Ma(尤其是5Ma)以来的阶段性聚集。
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| 关 键 词： | 煤成甲烷 热解实验 碳同位素 动力学模拟 天然气成因 库车坳陷 |
| 文章编号： | 0253-9985(2004)01-0021-05 |
| 收稿时间： | 2003-12-05 |
Kinetic study of carbon isotope in humic gas methane in Kuqa depression |
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| Li Xianqing , Xiao Xianming Tang Y Mi Jingkui Shen Jiagui Xiao Zhongyao Bao Jianping Xiong Bo.Kinetic study of carbon isotope in humic gas methane in Kuqa depression[J].Oil & Gas Geology,2004,25(1):21-25. |
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| Authors: | Li Xianqing Xiao Xianming Tang Y Mi Jingkui Shen Jiagui Xiao Zhongyao Bao Jianping Xiong Bo |
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| Affiliation: | 1. Jianghan Petroleum University, Jingzhou, Hubei;
2. Guangzhou Institute of Geochemistry of Chinese Academy of Sciences, Guangzhou;
3. California Institute of Technology, California, USA;
4. Exploration and Development Research Institute of Tarim Oil Field Company, CNPC, Korla, Xinjiang |
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| Abstract: | The characteristics and kinetic modeling of carbon isotope of methane in Jurassic humic gas in Kuqa depression in Tarim basin have been studied by combining pyrolysis experiment in closed gold tube system and analysis of methane isotope with GC-IRMS isotope mass spectrograph.The carbon isotope ranges between -3.6%～-2.5% and is closely related to pyrolysis temperature (or vitrinite reflectance Ro) and heating rate. Kinetic simulation results of carbon isotope in humic gas methane are in good agreement with the experimental data, thus the experimental data can be extrapolated through kinetic modeling and applied to actual geological conditions. Simulation results show that natural gas in Kela 2gas field in Kuqa depression has mainly experienced episodic accumulation since 10 Ma (especially 5 Ma). |
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| Keywords: | humic gas methane pyrolysis experiment carbon isotope kinetic modeling origin of natural gas Kuqa depression |
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