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渤海湾盆地东营凹陷古近系富碳酸盐矿物页岩储集特征及其控制因素

徐效平

徐效平. 渤海湾盆地东营凹陷古近系富碳酸盐矿物页岩储集特征及其控制因素[J]. 石油实验地质, 2023, 45(3): 413-421. doi: 10.11781/sysydz202303413
引用本文: 徐效平. 渤海湾盆地东营凹陷古近系富碳酸盐矿物页岩储集特征及其控制因素[J]. 石油实验地质, 2023, 45(3): 413-421. doi: 10.11781/sysydz202303413
XU Xiaoping. Reservoir characteristics and controlling factors of Paleogene carbonate-rich shale in Dongying Sag, Bohai Bay Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2023, 45(3): 413-421. doi: 10.11781/sysydz202303413
Citation: XU Xiaoping. Reservoir characteristics and controlling factors of Paleogene carbonate-rich shale in Dongying Sag, Bohai Bay Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2023, 45(3): 413-421. doi: 10.11781/sysydz202303413

渤海湾盆地东营凹陷古近系富碳酸盐矿物页岩储集特征及其控制因素

doi: 10.11781/sysydz202303413
详细信息
    作者简介:

    徐效平(1974—),男,硕士,高级工程师,从事石油地质综合研究工作。E-mail: xuxiaoping015.slyt@sinopec.com

  • 中图分类号: TE122.2

Reservoir characteristics and controlling factors of Paleogene carbonate-rich shale in Dongying Sag, Bohai Bay Basin

  • 摘要: 综合运用岩心观察、薄片观察、氮气吸附和X衍射等分析方法,对渤海湾盆地济阳坳陷东营凹陷牛页1井、樊页平1井古近系沙河街组四段上亚段的湖相页岩的矿物组成、沉积构造、纹层类型、孔径分布、孔体积、比表面积、纹层数量及溶蚀孔形态等特征进行了精细刻画。在此基础上总结了该地区主要岩相类型及纹层特征,不同岩相的孔径、孔体积及比表面积,富碳酸盐矿物页岩的孔隙及纹层特征。东营凹陷主要发育富有机质纹层状泥质灰岩、富有机质纹层状砂质灰岩、含有机质纹层状砂质灰岩、含有机质块状灰岩4种岩相类型。纹层镜下特征主要有平直状、透镜状、夹层状、波状等特征。实测氮气吸附数据显示东营凹陷富碳酸盐矿物页岩具有更大的孔体积及比表面积。同时,溶蚀孔和纹层的发育使得富碳酸盐矿物页岩具有更高的储集能力和水平渗透率。因此,富碳酸盐矿物页岩是东营凹陷优质储集单位。

     

  • 图  1  渤海湾盆地东营凹陷区域地质概况

    据参考文献[13]修改。

    Figure  1.  Regional geological survey of Dongying Sag, Bohai Bay Basin

    图  2  渤海湾盆地东营凹陷樊页平1、牛页1井岩相分类

    Figure  2.  Lithofacies classification of wells NY1 and FYP1 in Dongying Sag, Bohai Bay Basin

    图  3  渤海湾盆地东营凹陷研究区典型岩相岩心

    a.富有机质纹层状泥质灰岩相,牛页1井,3 437.38~3 437.78 m;b.含有机质纹层状砂质灰岩相,牛页1井,3 347.83~3 348.25 m;c.富有机质纹层状砂质灰岩相,樊页平1井,3 473.50 m;d.含有机质块状灰岩相,樊页平1井,3 455.84~ 3 455.98 m;e.富有机质纹层状泥质灰岩,牛页1井,3 490.12 m

    Figure  3.  Cores of typical lithofacies in Dongying Sag, Bohai Bay Basin

    图  4  渤海湾盆地东营凹陷樊页平1井岩心纹层镜下照片

    a.平直纹层,富有机质纹层与碳酸盐纹层等厚分布,樊页平1井,3 451.70 m;b.透镜状纹层,富有机质纹层较薄,呈波状,亮晶方解石呈透镜状,樊页平1井,3 471.00 m;c.夹层状纹层,富有机质与碳酸盐纹层互层,碳酸盐纹层较厚,富有机质纹层较薄,樊页平1井,3 473.00 m;d.夹层状纹层,富有机质与碳酸盐纹层互层,富有机质纹层较厚,碳酸盐纹层较薄,有零星石英分布,樊页平1井,3 473.50 m

    Figure  4.  Microscopic pictures of core laminae of well FYP1 in Dongying Sag, Bohai Bay Basin

    图  5  渤海湾盆地东营凹陷樊页平1井差异岩相页岩不同孔径孔体积分布

    Figure  5.  Distribution of pore volume and pore size of shale with different lithofacies in well FYP1, Dongying Sag, Bohai Bay Basin

    图  6  渤海湾盆地东营凹陷樊页平1井差异岩相页岩不同孔径孔比表面积分布

    Figure  6.  Distribution of pore specific surface area and pore size of shale with different lithofacies in well FYP1, Dongying Sag, Bohai Bay Basin

    图  7  渤海湾盆地东营凹陷不同岩相页岩总孔体积和总孔比表面积分布

    Figure  7.  Distribution of total pore volume and total pore specific surface area of shale with different lithofacies in Dongying Sag, Bohai Bay Basin

    图  8  渤海湾盆地东营凹陷樊页平1井碳酸盐矿物含量对孔隙结构的影响

    Figure  8.  Effect of carbonate mineral content on pore structure of well FYP1 in Dongying Sag, Bohai Bay Basin

    图  9  渤海湾盆地东营凹陷樊页平1井晶粒碳酸盐矿物扫描电镜溶蚀孔特征

    Figure  9.  SEM photographs of dissolution pores in crystalline carbonate minerals from well FY1, Dongying Sag, Bohai Bay Basin

    图  10  渤海湾盆地济阳坳陷页岩油储层不同岩相渗透率各向异性直方图

    据参考文献[20]修改。

    Figure  10.  Histogram of permeability anisotropy of different lithofacies of shale oil reservoirs in Jiyang Depression, Bohai Bay Basin

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  • 收稿日期:  2023-03-27
  • 修回日期:  2023-05-12
  • 刊出日期:  2023-05-28

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