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    塔里木盆地海相油气源与混源成藏模式

    李素梅 庞雄奇 杨海军 肖中尧 顾乔元 张宝收

    李素梅, 庞雄奇, 杨海军, 肖中尧, 顾乔元, 张宝收, 2010. 塔里木盆地海相油气源与混源成藏模式. 地球科学, 35(4): 663-673. doi: 10.3799/dqkx.2010.081
    引用本文: 李素梅, 庞雄奇, 杨海军, 肖中尧, 顾乔元, 张宝收, 2010. 塔里木盆地海相油气源与混源成藏模式. 地球科学, 35(4): 663-673. doi: 10.3799/dqkx.2010.081
    LI Su-mei, PANG Xiong-qi, YANG Hai-jun, XIAO Zhong-yao, GU Qiao-yuan, ZHANG Bao-shou, 2010. Generation, Migration and Accumulation Model for the Marine Oils in the Tarim Basin. Earth Science, 35(4): 663-673. doi: 10.3799/dqkx.2010.081
    Citation: LI Su-mei, PANG Xiong-qi, YANG Hai-jun, XIAO Zhong-yao, GU Qiao-yuan, ZHANG Bao-shou, 2010. Generation, Migration and Accumulation Model for the Marine Oils in the Tarim Basin. Earth Science, 35(4): 663-673. doi: 10.3799/dqkx.2010.081

    塔里木盆地海相油气源与混源成藏模式

    doi: 10.3799/dqkx.2010.081
    基金项目: 

    国家重点基础研究与发展"973"项目 2006CB202308

    国家自然科学基金项目 0973031

    国家自然科学基金项目 40772077/D0206

    中国石油大学油气资源与探测国家重点实验室基金 PRPJC2008-02

    详细信息
      作者简介:

      李素梅(1968-), 女, 副教授, 主要从事有机地球化学研究工作.E-mail: smli8888@yahoo.com.cn

    • 中图分类号: P618.13

    Generation, Migration and Accumulation Model for the Marine Oils in the Tarim Basin

    • 摘要: 塔里木盆地油气源长期争论不休.采用单体烃同位素、包裹体成分与年代指示生物标志物等途径, 对塔里木盆地塔中、轮南典型油气藏进行了油气成因与混源成藏模式的研究.结果表明, 塔中、轮南绝大部分原油生物标志物与中上奥陶统烃源岩相似, 仅少部分原油显现与寒武系—下奥陶统烃源岩相近的特征, 但正构烷烃单体烃碳同位素分析表明, 原油绝大部分实质仍为混源油.塔中包裹烃成分分析进一步证实了原油的混源特性.利用同位素进行的混源定量结果表明, 塔中原油中寒武系—下奥陶统成因原油的混入量约为11%~100%(均值45%); 轮南地区约为11%~70%(均值36%), 表明寒武系—下奥陶统、中上奥陶统均为塔里木盆地的主力烃源岩.油气运移地化指标与地质条件的综合研究认为, 塔中地区断层是油气运移的重要通道, 塔中I号断层与斜交的走滑断层的交汇点是油气的主要注入点; 轮南地区侧向运移特征较明显.研究区存在调整型、多期充注型与原生型多种混源成藏模式.塔里木海相油气的普遍混源表明深层仍有油气勘探潜能.揭示海相混源油气成藏机制是指导塔里木海相油气勘探的关键.

       

    • 图  1  塔中中央隆起构造单元与部分油样位置

      ①Ⅰ号断裂带;②TZ47-15井区;③TZ2井区;④TZ16井区;⑤TZ4井区;⑥TZ1-6井区

      Fig.  1.  Tectonic units and location of oil samples in the Tazhong uplift

      图  2  塔中部分原油m/z=217质量色谱

      Fig.  2.  Partial m/z=217 mass fragmentograms for selected oils in the Tazhong uplift

      图  3  塔中原油、烃源岩生物标志物参数对比指示混源

      Fig.  3.  Oil-oil and oil-source rock correlation showing mixed sources of the Tazhong oils

      图  4  塔中原油、烃源岩正构烷烃单体同位素指示原油混源

      Fig.  4.  δ13C values of individual n-alkanes for oils and source rock in the Tazhong uplift and the peripheral zone indicating oil mixing

      图  5  塔中碳酸盐岩储层方解石脉包裹烃m/z=218质量色谱

      Fig.  5.  Partial m/z=218 mass fragmentograms of the fluid inclusion oils from Carbonate reservoir in the Tazhong uplift

      图  6  塔中Ⅰ号构造带东西向原油基本地球化学参数指示油气运移特征

      纵坐标.样品代号,按地理位置从左向右排列;MNR.甲基萘指数;MPI—1.甲基菲指数I;4, 9—/3, 4—DAD.4, 9—/3, 4—二甲基金刚烷;黑箭头指示油气注入点,一般为转换断层发育附近

      Fig.  6.  Geochemical parameters of the oils around the No.1 fault indicating basic oil migration features

      图  7  塔中、轮南地区∈—O1成因原油混入量与埋深关系

      Fig.  7.  Percent of ∈—O1 genetic affinity oils mixed versus oil burial depth

      图  8  塔中隆起油气运移模式示意图

      b, d标注参数分别为三环/五环萜、C21-22/C29—甾烷

      Fig.  8.  Hydrocarbons migration patterns for the Tazhong oils

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    • 收稿日期:  2009-12-08
    • 刊出日期:  2010-07-01

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