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渤海湾盆地东营凹陷古近系富碳酸盐页岩沉积微相组合及沉积环境分析

王伟庆 李朋波 李博 方正伟 王玉环

王伟庆, 李朋波, 李博, 方正伟, 王玉环. 渤海湾盆地东营凹陷古近系富碳酸盐页岩沉积微相组合及沉积环境分析[J]. 石油实验地质, 2024, 46(3): 522-531. doi: 10.11781/sysydz202403522
引用本文: 王伟庆, 李朋波, 李博, 方正伟, 王玉环. 渤海湾盆地东营凹陷古近系富碳酸盐页岩沉积微相组合及沉积环境分析[J]. 石油实验地质, 2024, 46(3): 522-531. doi: 10.11781/sysydz202403522
WANG Weiqing, LI Pengbo, LI Bo, FANG Zhengwei, WANG Yuhuan. Sedimentary microfacies and environment of Paleogene carbonate-rich shale in Dongying Sag, Bohai Bay Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2024, 46(3): 522-531. doi: 10.11781/sysydz202403522
Citation: WANG Weiqing, LI Pengbo, LI Bo, FANG Zhengwei, WANG Yuhuan. Sedimentary microfacies and environment of Paleogene carbonate-rich shale in Dongying Sag, Bohai Bay Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2024, 46(3): 522-531. doi: 10.11781/sysydz202403522

渤海湾盆地东营凹陷古近系富碳酸盐页岩沉积微相组合及沉积环境分析

doi: 10.11781/sysydz202403522
基金项目: 

中国石化股份公司重点实验室项目“济阳坳陷古近系细粒沉积特征与古湖泊演化” KJ21042

详细信息
    作者简介:

    王伟庆(1969—),男,博士生,高级工程师,从事石油地质实验及油气勘探研究。E-mail:wangweiqing062.slyt@sinopec.com

  • 中图分类号: TE121.3

Sedimentary microfacies and environment of Paleogene carbonate-rich shale in Dongying Sag, Bohai Bay Basin

  • 摘要: 渤海湾盆地东营凹陷富碳酸盐页岩的微相特征识别、划分及其组合方式研究,是揭示相关沉积物沉积成因和空间结构的基础。基于岩心和岩石薄片资料,利用X射线衍射、扫描电镜分析等测试分析技术,通过高分辨率的岩心取样和测试,对东营凹陷斜坡带富碳酸盐页岩开展了岩石矿物学和古生物学等方面的分析。结果表明,该区富碳酸盐页岩内部可以划分出藻席微相、介壳页岩微相等10种微相类型,各类微相通过不同方式叠加构成一系列微相组合,并显示出米级尺度的页岩相变特征。对应于东营凹陷咸水湖泊演化的不同阶段,可划分出浅水蒸发岩微相组合、震荡半深水页岩微相组合和震荡深水页岩微相组合等3种岩石微相组合,这些组合通常由高频振荡背景下湖平面升降旋回控制。东营凹陷沙河街组四段上亚段自下而上,伴随气候的湿热、风化增强、湖平面上升、湖泊盐度降低,震荡深水页岩微相组合占比逐渐增加,浅水蒸发岩微相组合逐渐降低,一系列向上水体变深的沉积旋回记录了东营凹陷中始新世持续沉降和生物—环境协同演化的特点。

     

  • 图  1  渤海湾盆地东营凹陷构造位置(a)、构造单元(b)和沙河街组岩性柱状图(c)

    Figure  1.  Structural location (a), tectonic unit (b), and lithologic histogram of Shahejie Formation (c) in Dongying Sag, Bohai Bay Basin

    图  2  渤海湾盆地东营凹陷沙河街组四段上亚段富碳酸盐页岩沉积微相类型

    a.牛斜124井,3 243.75 m,红色页岩微相;b.樊页平1井,3 470.00 m,介壳页岩微相;c.樊页1井,3 432.42 m,白云质页岩微相;d.樊页1井,3 437.30 m,生物礁滩微相;e.纯372井,2 605.90 m,颗石藻页岩微相;f.樊页1井,3 430.00 m,透镜状灰质页岩微相;g.樊页平1井,3 454.00 m,重力流水道微相;h.樊页平1井,3 468.30 m,藻席微相;i.樊页平1井,3 473.5 7 m,泥质页岩微相;j.牛55-斜4井,3 956.10 m,含盐膏页岩微相。

    Figure  2.  Sedimentary microfacies types of carbonate-rich shale in upper submember of fourth member of Shahejie Formation in Dongying Sag, Bohai Bay Basin

    图  3  渤海湾盆地东营凹陷樊页平1井3 470.2 m岩心薄片和荧光薄片图像

    Figure  3.  Microscopic images of thin section and fluorescence thin section of well Fanyeping 1 (3 470.2 m) in Dongying Sag, Bohai Bay Basin

    图  4  渤海湾盆地东营凹陷富碳酸盐页岩沉积微相组合

    Figure  4.  Sedimentary microfacies combinations of carbonate-rich shale in Dongying Sag, Bohai Bay Basin

    图  5  渤海湾盆地东营凹陷富碳酸盐页岩沉积模式

    Figure  5.  Sedimentation model of carbonate-rich shale in Dongying Sag, Bohai Bay Basin

    表  1  渤海湾盆地东营凹陷沙河街组四段上亚段沉积微相组合

    Table  1.   Sedimentary microfacies combinations of upper submember of fourth member of Shahejie Formation in Dongying Sag, Bohai Bay Basin

    物源供给 微相组合 成因相 微相类型及标志 生物群落 充填方式
    过补偿 震荡深水页岩微相组合 远岸生物带,风暴沉积,浊流沉积 泥质页岩微相,介壳页岩微相,重力流水道微相,含膏盐页岩微相。水平纹层 鱼类,介形虫,盘星藻,软体类 进积
    平衡充填 震荡半深水页岩微相组合 泥丘,微生物席,滑塌角砾 藻席微相,透镜状灰质页岩微相,白云质页岩微相。滑塌构造,交错纹层,波状纹层,透镜状纹层,压扁纹层等 介形类,渤海藻 加积
    欠补偿 浅水蒸发岩微相组合 生物礁,粒屑滩,藻席,盐沼等 颗石藻页岩微相,生物礁滩微相,白云质页岩微相,含膏盐页岩微相。鸟眼构造,干裂纹,虫孔,含植物叶片的泥晶石灰岩 有孔虫,介形类,徳弗兰藻,陆生植物化石等 退积
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  • 收稿日期:  2023-08-14
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