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    塔里木盆地塔中16石炭系低含油饱和度油藏成因机理

    李卓 姜振学 李峰

    李卓, 姜振学, 李峰, 2014. 塔里木盆地塔中16石炭系低含油饱和度油藏成因机理. 地球科学, 39(5): 557-564. doi: 10.3799/dqkx.2014.053
    引用本文: 李卓, 姜振学, 李峰, 2014. 塔里木盆地塔中16石炭系低含油饱和度油藏成因机理. 地球科学, 39(5): 557-564. doi: 10.3799/dqkx.2014.053
    Li Zhuo, Jiang Zhenxue, Li Feng, 2014. Genetic Mechanism of Carboniferous Low-Oil Saturation Reservoirs in Tazhong-16 Well Block. Earth Science, 39(5): 557-564. doi: 10.3799/dqkx.2014.053
    Citation: Li Zhuo, Jiang Zhenxue, Li Feng, 2014. Genetic Mechanism of Carboniferous Low-Oil Saturation Reservoirs in Tazhong-16 Well Block. Earth Science, 39(5): 557-564. doi: 10.3799/dqkx.2014.053

    塔里木盆地塔中16石炭系低含油饱和度油藏成因机理

    doi: 10.3799/dqkx.2014.053
    基金项目: 

    国家自然基金项目 40972088

    国家重点基础研究“973”项目 2011CB201100

    国家油气重大专项 2011ZX05003-001

    详细信息
      作者简介:

      李卓(1983—),男,助理研究员,主要从事油气成藏机理与油气藏分布预测研究.E-mail: lz830706@yahoo.cn

    • 中图分类号: P618.3

    Genetic Mechanism of Carboniferous Low-Oil Saturation Reservoirs in Tazhong-16 Well Block

    • 摘要: 塔中16石炭系油藏位于塔里木盆地塔中地区,具有低含油饱和度的油层分布在相对低孔-渗的储层中,而高GOI值的水层分布在高孔-渗储层中的特征.为阐明其特殊的成因机理,利用石油包裹体丰度(GOI)分析方法,结合圈闭演化历史开展了详细研究.结果表明,现今油层和水层的样品都具有较高的GOI值(5.6%~32.0%),暗示在地质历史时期形成了古油层,GOI值与孔隙度和渗透率具有正相关关系.高孔-渗储层优先充注油气,形成具有高含油饱和度、高GOI值的油层,低孔-渗储层充注油气较少,形成具有低含油饱和度,相对低GOI值的油层.而古油层泄漏的过程中,高孔-渗储层中聚集的油气也更容易泄漏,形成高GOI值水层,低孔-渗储层中充注的油气泄漏较少,形成低含油饱和度油层.综合分析认为:不同孔-渗条件储层的差异充注和成藏后的差异泄漏,是塔中16石炭系低含油饱和度油藏的形成机理.深化并研究了多期演油气区的成藏机理,对于深入认识多期演化背景的致密砂岩油气勘探潜力具有指导意义.

       

    • 图  1  塔中16油田构造位置与油藏剖面

      Fig.  1.  Location of the Tazhong-16 oil reservoirs

      图  2  TZ16井石炭系综合柱状图与GOI

      Fig.  2.  Strata column showing GOI values in Well TZ16

      图  3  塔中16石炭系油藏储层孔隙度与渗透率关系

      a.岩性分段与孔-渗关系;b.含油气性与孔-渗关系

      Fig.  3.  Correlations of porosity with permeability in the Tazhong-16 oil reservoirs

      图  4  TZ16井石油包裹体特征与GOI

      a.沿石英微裂隙零星分布的淡黄色的石油包裹体;b.沿石英碎屑内的微裂隙成带状分布淡黄-灰色的气液烃包裹体;c.沿石英微裂隙成带状分布深褐色、淡黄色的液烃包裹体;d.粒间孔隙被深褐色沥青充填,透射光照

      Fig.  4.  Photos showing petroleum inclusions and GOI values in Well TZ16

      图  5  塔中16石炭系油田含油饱和度与孔隙度、渗透率关系

      Fig.  5.  Correlations of oil saturation with porosity and permeability in the Tazhong-16 oil reservoirs

      图  6  塔中16油田成藏演化剖面

      Fig.  6.  Profile evolution of the Tazhong-16 oil reservoir

      图  7  塔中16石炭系油田GOI值与孔隙度、渗透率关系

      Fig.  7.  Correlations of GOI values with porosity and permeability in the Tazhong-16 oil reservoir

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    • 收稿日期:  2013-06-30
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