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| 引用本文： | 李贤庆,肖贤明,米敬奎,刘德汉,申家贵,唐永春,肖中尧.???????????2???????????????????[J].天然气工业,2004,24(11):8-10. |
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| 作者姓名： | 李贤庆 肖贤明 米敬奎 刘德汉 申家贵 唐永春 肖中尧 |
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| 作者单位： | 1.?й??????????????о????л??????????????????????????????????2.?й??????????????о????л???????????????????3.???????????????????????о??????4.?й????????????????????????о?? |
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| 基金项目： | 国家"十五"重点科技攻关项目(2001BA605A02-03-01)
中国博士后科学基金(2002031282)
国家自然科学基金(40072043)
中国科学院知识创新工程重要方向性项目(KZCX2-110)的联合成果。 |
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| 摘 要： | 文章研究了塔里木盆地库车坳陷侏罗系煤系烃源岩在封闭体系下热模拟生成甲烷的碳同位素特征及其动力学参数,探讨了克拉2大气田天然气的成因。碳同位素动力学研究表明,库车坳陷侏罗系煤系烃源岩热模拟生成甲烷的碳同位素值介于-37‰～-25‰之间;可以用动力学方法将煤系烃源岩热模拟实验数据外推,应用于地质条件。克拉2大气田天然气主要来源于中下侏罗统煤系烃源岩,属阶段捕获气,主要聚集了-5～-1 Ma阶段的天然气,其成熟度Ro 为1.3%～2.5%。这不仅得到早期相关研究成果的支持,而且也符合该区天然气的勘探实际。
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| 关 键 词： | 天然气成因 碳同位素 动力学 煤系烃源岩 侏罗系 热模拟实验 克拉2大气田 |
ORIGIN OF NATURAL GAS IN KELA-2 LARGE GAS FIELD IN TALIMU BASIN |
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| Li Xianqing,Xiao Xianming,Mi Jingkui,Liu Dehan,Shen Jiagui,Tang Yongchun,Xiao Zhongyao.ORIGIN OF NATURAL GAS IN KELA-2 LARGE GAS FIELD IN TALIMU BASIN[J].Natural Gas Industry,2004,24(11):8-10. |
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| Authors: | Li Xianqing Xiao Xianming Mi Jingkui Liu Dehan Shen Jiagui Tang Yongchun Xiao Zhongyao |
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| Affiliation: | 1.State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry??Chinese Academy of Sciences??2.Department of Geochemistry??Changjiang University??3.Center of Petroleum Energy and Environmental research??California Institute of Technology??America??4.Research Institute of Exploration and Devlopment??Talimu Oil Field Branch??PCL |
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| Abstract: | The characteristics and dynamic nibble of carbon isotope of the methane generated by thermal simulation of the hydrocabon source rocks of Jurassic coal measures in Kuche Depression of Talimu Basin under a closed system was investigated and the origin of natural gas in Kela 2 large gas field was discussed by the authors. The research results of carbon isotope dynamics indicates thae the carbon isotope ratios of the methane range from-37‰ to-25‰,and the thermal simulation experimental data can be extrapolated to the real geological circumstances by use of dynamic method, The natural gas accumulated in Kela 2 large gas field mainly came from the hydrocarbon source rocks of Middle Lower Jurassic coal measures and was generated during 1×106—5×106 years ago,its vitrinite reflectance (Ro) being 1.3%—2.5%. This conclusion is not only supported by previous relevant research results but also consistent with the actual situation of gas exploration in the region. |
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| Keywords: | Natural gas Origin Carbon i-sotope Dynamics Coal measures Hydrocarbon source rock Jurassic Period Thormal simulation experiment Ke-la-2 large gas field |
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