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苏北盆地高邮凹陷古近系阜宁组二段页岩油富集主控因素

段宏亮 孙雅雄 杨保良

段宏亮, 孙雅雄, 杨保良. 苏北盆地高邮凹陷古近系阜宁组二段页岩油富集主控因素[J]. 石油实验地质, 2024, 46(3): 441-450. doi: 10.11781/sysydz202403441
引用本文: 段宏亮, 孙雅雄, 杨保良. 苏北盆地高邮凹陷古近系阜宁组二段页岩油富集主控因素[J]. 石油实验地质, 2024, 46(3): 441-450. doi: 10.11781/sysydz202403441
DUAN Hongliang, SUN Yaxiong, YANG Baoliang. Main controlling factors of shale oil enrichment in second member of Paleogene Funing Formation in Gaoyou Sag of Subei Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2024, 46(3): 441-450. doi: 10.11781/sysydz202403441
Citation: DUAN Hongliang, SUN Yaxiong, YANG Baoliang. Main controlling factors of shale oil enrichment in second member of Paleogene Funing Formation in Gaoyou Sag of Subei Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2024, 46(3): 441-450. doi: 10.11781/sysydz202403441

苏北盆地高邮凹陷古近系阜宁组二段页岩油富集主控因素

doi: 10.11781/sysydz202403441
基金项目: 

国家自然科学基金面上项目 42072155

中国石化科技部项目 P21113

中国石化科技部项目 P23189

中国石化江苏油田分公司科研课题 JD22002

详细信息
    作者简介:

    段宏亮(1977—),男,博士,高级工程师,主要从事油气勘探研究。E-mail:duanhl.jsyt@sinopec.com

    通讯作者:

    孙雅雄(1993—),男,博士,副研究员,主要从事非常规油气地质理论研究与评价。E-mail:sunyaxiong2015@163.com

  • 中图分类号: TE122.2

Main controlling factors of shale oil enrichment in second member of Paleogene Funing Formation in Gaoyou Sag of Subei Basin

  • 摘要: 高邮凹陷古近系阜宁组二段是苏北盆地页岩油勘探的重点区带和层系,已部署实施的8口页岩油水平井的成功,证实其具有非常大的页岩油勘探潜力和良好的勘探前景。针对该层段页岩油井产能存在差异、富集主控因素认识不清楚等难点问题,综合利用岩心、测录井、分析测试数据和生产动态数据等资料,对阜二段地质特征和页岩油富集主控因素进行研究。高邮凹陷阜二段泥页岩以长英质—黏土质混积岩和长英质—灰质/白云质混积岩为主,有机质丰度中等,有机质类型以Ⅰ型和Ⅱ1型为主;自下向上有机质类型由腐殖型向腐泥型逐渐转变,有机质丰度总体由低逐渐增高,具有较好的页岩油形成条件。综合岩相、生油性、含油性、储集性、可压性等多因素评价可知,高邮凹陷阜二段共发育Ⅴ-4~Ⅴ-9、Ⅳ-2~Ⅳ-7小层和Ⅱ~Ⅲ亚段三套勘探有利层段。阜二段页岩油富集具体表现为:①有利岩相组合是页岩油富集的物质基础,其中混积岩夹白云石条带是有利的源—储配置组合,页岩油产能高;②复杂的孔缝系统是页岩油富集的核心,层理缝和裂缝是页岩油流动的主要通道,有效沟通基质孔隙,提高页岩油导流能力;③较高的成熟度和良好的保存条件是页岩油高产稳产的关键,镜质体反射率(Ro)介于0.8%~0.9%时滞留油含量相对较高,远离长期活动性断层的井游离烃含量(S1)相对较高。

     

  • 图  1  苏北盆地高邮凹陷古近系阜宁组二段页岩油有利区分布

    Figure  1.  Distribution of favorable shale oil areas of second member of Paleogene Funing Formation, Gaoyou Sag, Subei Basin

    图  2  苏北盆地高邮凹陷古近系阜宁组二段沉积古环境特征

    Figure  2.  Sedimentary paleoenvironmental characteristics of second member of Paleogene Funing Formation, Gaoyou Sag, Subei Basin

    图  3  苏北盆地高邮凹陷古近系阜宁组二段综合柱状图

    Figure  3.  Comprehensive histogram of second member of Paleogene Funing Formation, Gaoyou Sag, Subei Basin

    图  4  苏北盆地高邮凹陷古近系阜宁组二段各亚段页岩特征参数占比

    Figure  4.  Proportion of shale characteristic parameters in each sub-member of second member of Paleogene Funing Formation, Gaoyou Sag, Subei Basin

    图  5  苏北盆地高邮凹陷古近系阜宁组二段主要岩性组合储层特征对比

    Figure  5.  Comparison of reservoir characteristics of main lithological association of second member of Paleogene Funing Formation, Gaoyou Sag, Subei Basin

    图  6  苏北盆地高邮凹陷H2CHF井水平段排采过程中含水率变化曲线

    Figure  6.  Water content variation curves during horizontal section drainage process of well H2CHF in Gaoyou Sag, Subei Basin

    图  7  苏北盆地高邮凹陷古近系阜宁组二段泥页岩激光共聚焦扫描图

    绿色为轻质组分,红色为重质组分。

    Figure  7.  Laser confocal scanning images of shale of second member of Paleogene Funing Formation, Gaoyou Sag, Subei Basin

    图  8  苏北盆地高邮凹陷HY1井阜二段结构藻显微荧光照片

    Figure  8.  Microscopic fluorescence photo of algal structure in well HY1 of second member of Paleogene Funing Formation, Gaoyou Sag, Subei Basin

    图  9  苏北盆地高邮凹陷XYx1井阜二段泥页岩烃产率曲线

    Figure  9.  Shale hydrocarbon yield curves of well XYx1 of second member of Paleogene Funing Formation, Gaoyou Sag, Subei Basin

    图  10  苏北盆地高邮凹陷HY1井、S85X井、H101井游离烃含量与总有机碳含量关系

    Figure  10.  Relationship between free hydrocarbon and TOC content in wells HY1, S85X, and H101 in Gaoyou Sag, Subei Basin

    表  1  苏北盆地高邮凹陷古近系阜宁组二段不同岩性泥页岩参数统计

    Table  1.   Statistics of shale parameters of different lithology in second member of Paleogene Funing Formation, Gaoyou Sag, Subei Basin

    页岩岩性 ω(TOC)/% S1/(mg/g) Φ/%
    长英质—灰质/白云质混积岩 1.07 1.56 5.30
    长英质—黏土质混积岩 1.42 3.11 4.94
    黏土质长英细粒岩 1.77 3.07 5.05
    长英细粒岩 0.86 1.78 5.37
    长英质碳酸盐岩 1.45 1.54 4.33
    碳酸盐岩 1.44 2.59 5.17
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出版历程
  • 收稿日期:  2023-12-14
  • 修回日期:  2024-03-26
  • 刊出日期:  2024-05-28

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