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准噶尔盆地玛湖凹陷二叠系风城组页岩油赋存定量表征及其主控因素

李嘉蕊 杨智 王兆云 唐勇 张洪 蒋文琦 王小妮 魏琪钊

李嘉蕊, 杨智, 王兆云, 唐勇, 张洪, 蒋文琦, 王小妮, 魏琪钊. 准噶尔盆地玛湖凹陷二叠系风城组页岩油赋存定量表征及其主控因素[J]. 石油实验地质, 2023, 45(4): 681-692. doi: 10.11781/sysydz202304681
引用本文: 李嘉蕊, 杨智, 王兆云, 唐勇, 张洪, 蒋文琦, 王小妮, 魏琪钊. 准噶尔盆地玛湖凹陷二叠系风城组页岩油赋存定量表征及其主控因素[J]. 石油实验地质, 2023, 45(4): 681-692. doi: 10.11781/sysydz202304681
LI Jiarui, YANG Zhi, WANG Zhaoyun, TANG Yong, ZHANG Hong, JIANG Wenqi, WANG Xiaoni, WEI Qizhao. Quantitative characterization and main controlling factors of shale oil occurrence in Permian Fengcheng Formation, Mahu Sag, Junggar Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2023, 45(4): 681-692. doi: 10.11781/sysydz202304681
Citation: LI Jiarui, YANG Zhi, WANG Zhaoyun, TANG Yong, ZHANG Hong, JIANG Wenqi, WANG Xiaoni, WEI Qizhao. Quantitative characterization and main controlling factors of shale oil occurrence in Permian Fengcheng Formation, Mahu Sag, Junggar Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2023, 45(4): 681-692. doi: 10.11781/sysydz202304681

准噶尔盆地玛湖凹陷二叠系风城组页岩油赋存定量表征及其主控因素

doi: 10.11781/sysydz202304681
基金项目: 

中国石油科技项目 2021DJ18

国家高层次特殊人才支持计划 第四批次

详细信息
    作者简介:

    李嘉蕊(1998—),女,硕士,从事非常规油气地质研究。E-mail: LJR347092254@163.com

    通讯作者:

    杨智(1980—),男,博士,教授级高级工程师,从事非常规油气地质、常规油气风险勘探等研究。E-mail: yangzhi2009@petrochina.com.cn

  • 中图分类号: TE122.1

Quantitative characterization and main controlling factors of shale oil occurrence in Permian Fengcheng Formation, Mahu Sag, Junggar Basin

  • 摘要: 准噶尔盆地玛湖凹陷二叠系风城组页岩油赋存特征及控制因素复杂,赋存状态与定量表征难度大,厘清页岩油赋存特征和主控因素对优选甜点体具有重要意义。为表征玛湖凹陷不同赋存状态页岩油含量,对凹陷中心区和斜坡区的风城组页岩样品进行分步抽提,建立了不同赋存状态页岩油定量表征实验方法,分别得到游离轻烃、游离重烃和吸附烃的含量。在有机地球化学和储层微观特征研究的基础上,得到以下认识:由于研究区有机碳和黏土含量较低,风城组页岩油以游离赋存状态为主,吸附烃含量最少;页岩油多以油膜状赋存于矿物表面和干酪根中,重烃通常赋存于微孔比表面积大的页岩中,宏孔是游离油的主要赋存场所;有机质丰度和孔径增大,不同赋存状态页岩油含量均呈增加趋势,较高有机质丰度和孔径较大的储层有利于页岩油富集;成熟度可以很大程度上影响页岩中流体的吸附能力,有机质成熟度越高的页岩样品游离烃占比越多、吸附烃占比越少;比表面积的增大促进吸附油与游离重烃的富集,制约游离轻烃的富集,中孔比表面积对于页岩油的吸附量具有控制作用,比表面积越大页岩的吸附能力越强。相关研究和认识可为研究区优选甜点段和评价页岩油开采效益提供依据。

     

  • 图  1  准噶尔盆地玛湖凹陷二叠系风城组岩相和地层柱状图

    据文献[31]修改。

    Figure  1.  Lithofacies and stratigraphic column of Permian Fengcheng Formation in the Mahu Sag, Junggar Basin

    图  2  准噶尔盆地玛湖凹陷二叠系风城组页岩样品气相色谱特征

    蓝色箭头表示同一样品的分析顺序。

    Figure  2.  Gas chromatographic characteristics of shale samples from Permian Fengcheng Formation in the Mahu Sag, Junggar Basin

    图  3  准噶尔盆地玛湖凹陷二叠系风城组不同赋存状态页岩油含量

    Figure  3.  Content of shale oil in different occurrence states in Permian Fengcheng Formation in the Mahu Sag, Junggar Basin

    图  4  准噶尔盆地玛湖凹陷二叠系风城组TOC含量、S1与不同赋存状态页岩油的关系

    Figure  4.  Relationship between TOC content, S1 and shale oil in different occurrence states in Permian Fengcheng Formation in the Mahu Sag, Junggar Basin

    图  5  准噶尔盆地玛湖凹陷二叠系风城组有机质孔隙特征

    a-b.云质页岩,玛页1井,4 754.86 m,固体干酪根有机质,可见有机质粒内微孔;c-d.云质页岩,玛页1井,4 594.65 m,固体干酪根有机质,可见有机质内溶孔。

    Figure  5.  Characteristics of organic matter pores in Permian Fengcheng Formation in the Mahu Sag, Junggar Basin

    图  6  准噶尔盆地玛湖凹陷二叠系风城组有机质成熟度与不同赋存状态页岩油含量的关系

    Figure  6.  Relationship between organic matter maturity and content of shale oil in different occurrence states in Permian Fengcheng Formation in the Mahu Sag, Junggar Basin

    图  7  准噶尔盆地玛湖凹陷二叠系风城组页岩各样品孔径分布

    Figure  7.  Pore size distribution curves of shale samples from Permian Fengcheng Formation in the Mahu Sag, Junggar Basin

    图  8  准噶尔盆地玛湖凹陷二叠系风城组平均孔径与不同赋存状态页岩油含量的关系

    Figure  8.  Relationship between average pore size and content of shale oil in different occurrence states in Permian Fengcheng Formation in the Mahu Sag, Junggar Basin

    图  9  准噶尔盆地玛湖凹陷二叠系风城组孔体积与不同赋存状态页岩油含量的关系

    Figure  9.  Relation between pore volume and content of shale oil in different occurrence states in Permian Fengcheng Formation in the Mahu Sag, Junggar Basin

    图  10  准噶尔盆地玛湖凹陷二叠系风城组页岩油赋存特征

    a.白云质泥岩,灰黑色油斑,晶间孔,玛页1井,4 754.86 m;b.白云质泥岩,灰黑色油斑,粒间孔,玛页1井,4 754.86 m;c.泥岩,黑灰色油斑,溶蚀孔,玛页1井,4 594.65 m;d.泥岩,黑灰色油斑,有机质孔,玛页1井,4 594.65 m;e-f.泥岩,灰色荧光灰质,溶蚀孔,玛页1H井,4 542.85 m。

    Figure  10.  Occurrence characteristics of shale oil in Permian Fengcheng Formation in the Mahu Sag, Junggar Basin

    图  11  准噶尔盆地玛湖凹陷二叠系风城组比表面积与不同赋存状态页岩油比例的关系

    Figure  11.  Relationship between specific surface area and proportion of shale oil in different occurrence states in Permian Fengcheng Formation in the Mahu Sag, Junggar Basin

    表  1  准噶尔盆地玛湖凹陷二叠系风城组样品基本信息

    Table  1.   Basic information of samples from Permian Fengcheng Formation in the Mahu Sag, Junggar Basin

    样品编号 井号 地层 深度/m 岩性 w(TOC)/% Ro/%
    1 玛页2 风三段 3 856.8 云质页岩 2.18 0.73
    2 玛页2 风二段 4 431.5 云质页岩 0.97 0.79
    3 夏云1 风三段 5 106.8 云质页岩 1.50 1.02
    4 玛页1 风二段 4 745.0 含云粉砂岩 0.62 1.16
    5 玛页1 风二段 4 442.5 云质页岩 0.93 1.12
    6 夏云1 风三段 5 109.4 粉砂质泥岩 1.42 0.95
    7 玛页1 风二段 4 545.9 泥质白云岩 0.78 0.84
    8 玛页1 风二段 4 637.2 云质页岩 1.72 0.69
    下载: 导出CSV

    表  2  准噶尔盆地玛湖凹陷二叠系风城组游离油与吸附油定量分析实验结果

    Table  2.   Quantitative analysis results of free oil and adsorbed oil in Permian Fengcheng Formation in the Mahu Sag, Junggar Basin

    序号 ω(TOC)/ % S1/(mg/g) 步骤一:萃取 步骤二:第一次抽提 步骤三:第二次抽提
    萃取前质量/g 萃取后质量/g 游离轻烃质量/g 游离轻烃含量/(mg/g) 抽提前质量/g 抽提后质量/g 游离重烃质量/g 游离重烃含量/(mg/g) 抽提前质量/g 抽提后质量/g 吸附烃质量/g 吸附烃含量/(mg/g)
    1 2.18 1.37 105.113 103.427 1.579 15.02 103.427 103.085 0.343 3.31 103.085 103.069 0.015 0.15
    2 0.97 1.61 45.148 44.873 0.242 5.36 44.873 44.826 0.047 1.05 44.826 44.824 0.002 0.03
    3 1.50 1.68 214.362 213.584 0.761 3.55 213.584 213.306 0.279 1.30 213.306 213.287 0.019 0.09
    4 0.62 0.61 189.367 188.533 0.716 3.78 188.533 188.235 0.298 1.58 188.235 188.230 0.005 0.02
    5 0.93 0.98 139.753 138.666 1.087 7.78 138.666 138.451 0.215 1.55 138.451 138.441 0.010 0.07
    6 1.42 1.36 156.782 155.905 0.877 5.59 155.905 155.588 0.317 2.03 155.588 155.576 0.011 0.07
    7 0.78 0.82 166.732 166.002 0.399 2.39 166.002 166.137 0.196 1.18 166.137 166.131 0.004 0.02
    8 1.72 1.56 49.762 49.073 0.649 13.04 49.073 48.890 0.164 3.34 48.890 48.875 0.012 0.25
    下载: 导出CSV
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  • 收稿日期:  2023-02-03
  • 修回日期:  2023-06-15
  • 刊出日期:  2023-07-28

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