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羌塘盆地石炭-二叠系烃源岩地球化学特征讨论

陈文彬, 付修根, 谭富文, 曾胜强, 冯兴雷. 2017. 羌塘盆地石炭-二叠系烃源岩地球化学特征讨论[J]. 中国地质, 44(3): 499-510. doi: 10.12029/gc20170308
引用本文: 陈文彬, 付修根, 谭富文, 曾胜强, 冯兴雷. 2017. 羌塘盆地石炭-二叠系烃源岩地球化学特征讨论[J]. 中国地质, 44(3): 499-510. doi: 10.12029/gc20170308
CHEN Wenbin, FU Xiugen, TAN Fuwen, ZENG Shengqiang, FENG Xinglei. 2017. Organic geochemistry of Carboniferous-Permian sources rocks in Qiangtang Basin, Tibet[J]. Geology in China, 44(3): 499-510. doi: 10.12029/gc20170308
Citation: CHEN Wenbin, FU Xiugen, TAN Fuwen, ZENG Shengqiang, FENG Xinglei. 2017. Organic geochemistry of Carboniferous-Permian sources rocks in Qiangtang Basin, Tibet[J]. Geology in China, 44(3): 499-510. doi: 10.12029/gc20170308

羌塘盆地石炭-二叠系烃源岩地球化学特征讨论

  • 基金项目:
    中国地质调查局天然气水合物试采专项(GZH201400301)、青藏地区油气评价项目(1212011221114)及国家自然科学基金项目(41172098)联合资助
详细信息
    作者简介: 陈文彬, 男, 1979年生, 硕士, 高级工程师, 主要从事羌塘盆地石油地质研究, E-mail:cdcwenbin@qq.com
  • 中图分类号: P618.130.2;TE122.1+13

Organic geochemistry of Carboniferous-Permian sources rocks in Qiangtang Basin, Tibet

  • Fund Project: Supported by the Program of China Geological Survey (No. GZH201400301, No.1212011221114), National Natural Science Foundation of China (No. 41172098)
More Information
    Author Bio: CHEN Wenbin, male, born in 1979, senior engineer, master, engages in the petroleum geological study of the Qiangtang Basin; E-mail: cdcwenbin@qq.com .
  • 长期以来,羌塘盆地烃源岩的研究一直限于中生代地层,而对其古生代地层生烃能力一直缺乏系统研究。针对这一问题,本文选择羌塘盆地石炭-二叠系8条剖面的暗色泥岩及碳酸盐岩样品,对其从有机质丰度、有机质类型和热演化程度等方面进行了有机地球化学特征的分析。研究发现,石炭-二叠系可能烃源岩类型包括泥岩和碳酸盐岩两种,其分布总体上受沉积相的控制,碳酸盐岩烃源岩可能为局限台地相发育的泥晶灰岩,而泥质烃源岩主要为三角洲及斜坡相发育的暗色泥岩及凝灰质泥岩。石炭-二叠纪泥岩有机碳含量较高,具有较好生烃能力,大多达到烃源岩标准,尤其是刻莫石炭系剖面及贡日二叠系剖面,大多为中等-好烃源岩。碳酸盐岩有机碳含量总体比较低,为非烃源岩。石炭-二叠系碳酸盐岩烃源岩有机质类型为Ⅱ1型,泥质烃源岩有机质类型主要为Ⅱ2-Ⅲ型。石炭-二叠系烃源岩热演化程度总体较高,除盆地东部刻莫石炭系剖面处在成熟阶段外,大都处在高成熟-过成熟阶段,非常有利于天然气的生成,具备良好的天然气勘探前景。

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  • 图 1  羌塘盆地石炭—二叠系烃源岩剖面取样位置

    Figure 1. 

    图 2  羌塘盆地石炭—二叠系烃源岩剖面沉积特征及有机质丰度含量变化柱状图

    Figure 2. 

    图 3  羌塘盆地石炭—二叠系烃源岩有机碳含量与氯仿沥青“A”、有机碳含量与生烃潜力关系图

    Figure 3. 

    图 4  羌塘盆地石炭—二叠系烃源岩干酪根显微组分三角图

    Figure 4. 

    图 5  羌塘盆地石炭—二叠系泥岩H/C-O/C原子比图解

    Figure 5. 

    图 6  羌塘盆地石炭—二叠系烃源岩干酪根碳同位素分布图

    Figure 6. 

    表 1  羌塘盆地石炭—二叠纪地层划分与对比(据王剑等, 2009修改)

    Table 1.  Stratigraphic classification and correlation of Carboniferous-Permian strata in the Qiangtang Basin (modified from Wang Jian et al, 2009)

    下载: 导出CSV

    表 2  羌塘盆地有机质类型测试结果

    Table 2.  Test results of organic matter type of Carboniferous-Permian source rocks in the Qiangtang Basin

    下载: 导出CSV

    表 3  羌塘盆地石炭—二叠系烃源岩Ro-Tmax值统计

    Table 3.  Ro-Tmax data of Carboniferous-Permian source rocks from Qiangtang Basin

    下载: 导出CSV
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出版历程
收稿日期:  2016-03-03
修回日期:  2016-06-20
刊出日期:  2017-06-25

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