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    排烃门限存在的地质地球化学证据及其应用

    庞雄奇 李素梅 金之钧 黎茂稳

    庞雄奇, 李素梅, 金之钧, 黎茂稳, 2004. 排烃门限存在的地质地球化学证据及其应用. 地球科学, 29(4): 384-390.
    引用本文: 庞雄奇, 李素梅, 金之钧, 黎茂稳, 2004. 排烃门限存在的地质地球化学证据及其应用. 地球科学, 29(4): 384-390.
    PANG Xiong-qi, LI Su-mei, JIN Zhi-jun, LI Mao-wen, 2004. Geochemical Evidences of Hydrocarbon Expulsion Threshold and Its Application. Earth Science, 29(4): 384-390.
    Citation: PANG Xiong-qi, LI Su-mei, JIN Zhi-jun, LI Mao-wen, 2004. Geochemical Evidences of Hydrocarbon Expulsion Threshold and Its Application. Earth Science, 29(4): 384-390.

    排烃门限存在的地质地球化学证据及其应用

    基金项目: 

    国家重点基础研究发展规划项目 G199943310

    国家“十五”攻关课题 2001BA605A09

    详细信息
      作者简介:

      庞雄奇(1961-), 男, 博士, 教授, 主要从事油气成藏机理与资源评价的科研与教学工作.E-mail: pangxq@bjpeu.edu.cn

    • 中图分类号: P618.130

    Geochemical Evidences of Hydrocarbon Expulsion Threshold and Its Application

    • 摘要: 排烃门限概念的提出为有效源岩的判识奠定了理论基础, 它在油气勘探与资源评价中具有重要意义.采用地球化学的方法论证了排烃门限的客观存在.研究表明, 源岩进入排烃门限后, 其反映生烃潜能的指标(S1+S2)/TOC、氢指数以及反映烃源岩残留烃量的指标氯仿沥青“A”都开始明显降低; 烃源岩中可溶有机质的化学成分、生物标志物的含量与分布特征也都发生明显的变化, 没有进入排烃门限的源岩可溶有机质与原油差别大, 进入门限后的源岩可溶有机质开始与原油组分较为一致.渤海湾盆地东营凹陷沙四段泥岩和页岩的排烃门限分别为2 200 m和2 000 m左右, 排烃强度分别为0~1 100 kg/m2和0~150 kg/m2, 累积排出烃量为7.365×108 t和1.435×108 t.

       

    • 图  1  排烃门限地质概念模型(据庞雄奇等, 2001)

      Qp.累积生烃量; Qrm.残留烃临界饱和量; Qr.实际残烃量; Qe.源岩排烃总量; Qew, Qed, Qes.源岩水溶相、扩散相、游离相排烃量

      Fig.  1.  Geological model for hydrocarbon expulsion threshold

      图  2  排烃门限存在的证据

      a.煤化热模拟实验: A、B、C、D、E分别表示5种不同的煤岩; b.排油气门限数值模拟(海拉尔盆地煤源岩)

      Fig.  2.  Evidences for hydrocarbon expulsion threshold

      图  3  热演化过程中源岩生烃潜能变化特征

      Fig.  3.  Variation of hydrocarbon generation potential with depth

      图  4  氯仿沥青“A”与埋深关系

      Fig.  4.  Relationship of rock extracts verse depth

      图  5  八面河地区烃源岩、原油中生物标志物的分布特征反映排烃门限的客观存在

      Fig.  5.  Distribution of biomarkers in rock extracts and crude oils indicating hydrocarbon expulsion threshold

      图  6  排烃量计算理论模型

      Fig.  6.  Calculation model for expulsed hydrocarbons

      图  7  八面河地区沙四段泥岩、页岩的排烃强度等值线

      Fig.  7.  Hydrocarbons expulsion intensity of Es4 mudstone and shale of Bamianhe area

      表  1  不同层位烃源岩排烃量统计

      Table  1.   Total hydrocarbons expulsed from diverse strata of Bamianhe area

      表  2  八面河地区源岩排烃量相对贡献大小评价

      Table  2.   Relative contribution of hydrocarbons expulsed from Bamianhe area

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    出版历程
    • 收稿日期:  2004-03-18
    • 刊出日期:  2004-07-25

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