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    基于核磁共振表征渝西地区五峰组-龙一1亚段页岩储层孔隙结构及非均质性

    王子萌 蒋裕强 付永红 雷治安 徐昌海 袁竟舟 文冉 王占磊 谷一凡 尹兴平

    王子萌, 蒋裕强, 付永红, 雷治安, 徐昌海, 袁竟舟, 文冉, 王占磊, 谷一凡, 尹兴平, 2022. 基于核磁共振表征渝西地区五峰组-龙一1亚段页岩储层孔隙结构及非均质性. 地球科学, 47(2): 490-504. doi: 10.3799/dqkx.2021.076
    引用本文: 王子萌, 蒋裕强, 付永红, 雷治安, 徐昌海, 袁竟舟, 文冉, 王占磊, 谷一凡, 尹兴平, 2022. 基于核磁共振表征渝西地区五峰组-龙一1亚段页岩储层孔隙结构及非均质性. 地球科学, 47(2): 490-504. doi: 10.3799/dqkx.2021.076
    Wang Zimeng, Jiang Yuqiang, Fu Yonghong, Lei Zhian, Xu Changhai, Yuan Jingzhou, Wen Ran, Wang Zhanlei, Gu Yifan, Yin Xingping, 2022. Characterization of Pore Structure and Heterogeneity of Shale Reservoir from Wufeng Formation-Sublayers Long-11 in Western Chongqing Based on Nuclear Magnetic Resonance. Earth Science, 47(2): 490-504. doi: 10.3799/dqkx.2021.076
    Citation: Wang Zimeng, Jiang Yuqiang, Fu Yonghong, Lei Zhian, Xu Changhai, Yuan Jingzhou, Wen Ran, Wang Zhanlei, Gu Yifan, Yin Xingping, 2022. Characterization of Pore Structure and Heterogeneity of Shale Reservoir from Wufeng Formation-Sublayers Long-11 in Western Chongqing Based on Nuclear Magnetic Resonance. Earth Science, 47(2): 490-504. doi: 10.3799/dqkx.2021.076

    基于核磁共振表征渝西地区五峰组-龙一1亚段页岩储层孔隙结构及非均质性

    doi: 10.3799/dqkx.2021.076
    基金项目: 

    中石油-西南石油大学创新联合体项目二课题一专题四“复杂地质条件下川南深层/昭通中浅层海相页岩气赋存机制及控制因素研究” 2020CX020104

    四川省应用基础研究项目“海相页岩气建产核心区智能评价系统研究(省重)” 2019YJ0346

    四川省苗子工程重点项目“基于压裂液返排规律评价页岩气储层压裂效果的方法研究” 2019JDRC0095

    高等学校学科创新引智计划(111计划)“深层海相页岩气高效开发学科创新引智基地” D18016

    详细信息
      作者简介:

      王子萌(1997-), 男, 硕士研究生, 主要从事油气储层地质与油气藏开发地质研究工作.ORCID: 0000-0002-8110-9950.E-mail: wzm0v0@foxmail.com

    • 中图分类号: P618

    Characterization of Pore Structure and Heterogeneity of Shale Reservoir from Wufeng Formation-Sublayers Long-11 in Western Chongqing Based on Nuclear Magnetic Resonance

    • 摘要: 选取渝西地区五峰组-龙一1亚段富有机质页岩开展场发射扫描电镜、核磁共振和X射线衍射等实验,在图像处理和多重分形理论的基础上,分析了页岩储层孔隙结构特征及非均质性.结果表明:(1)扫描电镜分析认为,研究区有机孔平均孔径偏小, < 50 nm的有机孔数量占比82%,>100 nm的有机孔面孔率占比52%;(2)依据核磁T2谱峰形态划分为Ⅰ~Ⅲ类,分别为单峰、双峰和三峰3种类型,Ⅲ类页岩储层孔径、孔隙度较大,具备更优越的储集条件和渗流能力;(3)基于多重分形理论表征储层非均质性,石英含量越高,黏土含量越低非均质性越弱,进而控制着孔隙度和渗透率的大小.多重分形参数与矿物组分、物性参数的联系有效表征了储层孔隙结构,并为其非均质性的评估提供了新的视角.

       

    • 图  1  研究区位置(a、b)、研究区构造背景(c)与Z206井柱状图(d)

      Fig.  1.  Location of the study area (a, b), the structural background of the study area (c) and the column diagram of the Z206 well (d)

      图  2  五峰-龙马溪组页岩储层有机质孔隙的形成和生长过程

      Huang et al.(2020)修改

      Fig.  2.  Formation and growth process of organic matter pores in shale reservoirs of Wufeng Longmaxi formation

      图  3  研究区页岩有机质孔隙数量、占比及面孔率分布图

      Fig.  3.  Pore diameter distribution of shale organic matter in the study area

      图  4  研究区页岩有机质孔隙数量、占比及面孔率分布

      Fig.  4.  Pore diameter distribution of shale organic matter in the study area

      图  5  核磁共振T2分布及孔隙结构参数计算示意图

      Fig.  5.  NMR T2 distribution and schematic diagram of pore structure parameter calculation

      图  6  渗透率与核磁共振孔隙结构参数相关性

      Fig.  6.  Correlation graph between permeability and NMR pore structure parameters

      图  7  多重分形参数示意图

      Fig.  7.  Schematic diagram of multifractal parameters

      图  8  不同类型的T2分布及其对应的多重分形谱函数和广义分形维数谱

      a~c为Ⅰ型,d~e为Ⅱ型,g~i为Ⅲ型

      Fig.  8.  Different types of T2 distributions and their corresponding multifractal spectra and generalized fractal dimensions

      图  9  多重分形参数与孔隙度、渗透率相关性图

      Fig.  9.  Correlation diagram of multifractal parameters with porosity and permeability

      图  10  多重分形参数与矿物组分相关性图

      Fig.  10.  Correlation diagram of multifractal parameters and mineral composition

      表  1  样品矿物组成及有机质含量

      Table  1.   Mineral composition and organic matter content of samples

      井号 样品 层位 深度 TOC 矿物组分(%)
      (m) (%) 黏土 石英 长石 方解石 白云石
      Z205 #7 龙马溪组 3 327.6 2.24 37.9 42.2 6.7 3.9 5.5
      Z205 #12 龙马溪组 3 331.6 2.87 14.6 55.2 3.2 14.5 9.2
      Z205 #11 龙马溪组 3 346.2 4.30 16.1 46.3 1.8 11.4 22.9
      Z205 #4 五峰组 3 352.3 1.01 20.4 50.7 5.8 10.3 9.4
      Z203 #17 龙马溪组 4 100.8 4.56 10.2 64.7 2.8 6.3 13.0
      Z203 #16 龙马溪组 4 104.1 4.85 13.4 68.1 2.9 7.1 4.3
      Z203 #18 龙马溪组 4 105.7 5.43 23.4 32.8 4.3 27.5 10.2
      Z206 #3 龙马溪组 4 223.8 1.67 33.0 48.1 6.2 4.9 5.4
      Z206 #5 龙马溪组 4 259.0 2.51 22.7 48.5 8.2 8.6 9.1
      Z206 #6 五峰组 4 270.1 2.02 15.4 55.6 5.6 13.3 7.6
      Z206 #2 五峰组 4 273.2 1.67 21.7 65.2 3.7 1.7 3.2
      Z206 #1 五峰组 4 274.7 1.54 30.3 51.1 4.8 6.6 6.5
      Z208 #9 龙马溪组 4 351.4 2.91 41.7 22.2 6.3 13.0 10.4
      Z208 #10 龙马溪组 4 361.3 3.98 41.0 43.0 4.4 2.4 6.5
      Z208 #13 龙马溪组 4 366.0 4.64 29.3 42.5 11.3 3.2 6.7
      Z208 #8 龙马溪组 4 366.7 4.64 23.7 60.2 6.4 4.5 4.2
      Z208 #14 五峰组 4 370.6 2.86 36.8 37.1 6.1 12.4 6.2
      Z208 #15 五峰组 4 373.7 1.05 46.2 28.4 8.2 9.5 4.8
      下载: 导出CSV

      表  2  岩石物理性质及核磁共振孔隙结构参数

      Table  2.   Physical properties and pore structure parameters from NMR tests

      T2分布类型 样品 φHe(%) kHe(mD) φNMR(%) kSDR(mD) T15(ms) T35(ms) T50(ms) Tlm(ms)
      #1 3.23 0.003 3.13 0.001 5.20 0.50 0.29 0.53
      #2 4.22 0.003 2.80 0.000 1.28 0.42 0.26 0.40
      #3 3.55 0.002 3.17 0.000 0.95 0.38 0.24 0.32
      #4 3.14 0.007 3.28 0.007 13.16 0.76 0.37 0.85
      #5 3.03 0.008 2.98 0.003 13.69 0.65 0.33 0.76
      #6 2.78 0.004 2.42 0.001 21.07 0.54 0.27 0.75
      平均 3.33 0.004 2.96 0.002 9.23 0.54 0.29 0.60
      #7 5.16 0.023 4.30 0.015 3.98 1.01 0.47 0.73
      #8 4.35 0.011 3.94 0.018 5.05 1.19 0.55 0.90
      #9 5.90 0.027 4.97 0.047 4.95 1.54 0.72 0.89
      #10 4.21 0.018 4.59 0.102 29.12 1.92 0.64 1.41
      #11 4.22 0.010 4.05 0.011 5.41 0.97 0.44 0.72
      #12 4.54 0.012 3.64 0.016 6.20 1.37 0.63 0.97
      平均 4.73 0.017 4.25 0.035 9.12 1.33 0.58 0.94
      #13 7.40 0.015 7.19 0.570 7.48 3.30 1.84 1.64
      #14 6.47 0.015 6.68 0.608 9.38 2.96 1.56 1.96
      #15 6.87 0.014 9.08 1.831 15.91 3.36 1.68 2.26
      #16 4.49 0.017 4.98 0.244 12.47 3.12 1.51 1.86
      #17 5.49 0.014 5.73 0.234 8.24 3.03 1.45 1.50
      #18 4.56 0.013 5.52 0.185 8.56 3.21 1.49 1.41
      #18 4.56 0.013 5.52 0.185 8.56 3.21 1.49 1.41
      平均 5.69 0.014 6.39 0.551 10.09 3.17 1.57 1.72
      下载: 导出CSV

      表  3  多重分形特征参数

      Table  3.   Multifractal characteristic parameters

      样品 Dmin Dmax D0 D1 D2 D0-Dmax Dmin-D0 ΔD amax amin a0 Δa
      #1 2.02 0.70 1.00 0.85 0.75 0.30 1.03 1.32 2.20 0.68 1.00 1.52
      #2 1.98 0.68 1.00 0.82 0.73 0.31 0.98 1.29 2.17 0.66 1.00 1.51
      #3 2.09 0.67 1.00 0.80 0.71 0.33 1.10 1.42 2.25 0.65 1.00 1.60
      #4 2.02 0.74 1.00 0.89 0.79 0.26 1.02 1.28 2.22 0.71 1.00 1.51
      #5 2.00 0.73 1.00 0.88 0.78 0.27 1.00 1.28 2.19 0.70 1.00 1.49
      #6 1.95 0.71 1.00 0.88 0.77 0.29 0.96 1.25 2.15 0.68 1.00 1.46
      #7 2.14 0.77 1.00 0.87 0.81 0.23 1.15 1.38 2.32 0.74 1.00 1.58
      #8 2.11 0.78 1.00 0.88 0.82 0.22 1.11 1.33 2.30 0.76 1.00 1.53
      #9 2.18 0.79 1.00 0.87 0.82 0.21 1.19 1.39 2.36 0.78 1.00 1.58
      #10 2.16 0.79 1.00 0.90 0.85 0.20 1.16 1.36 2.34 0.76 1.00 1.57
      #11 2.13 0.76 1.00 0.88 0.81 0.24 1.13 1.37 2.31 0.74 1.00 1.57
      #12 2.10 0.79 1.00 0.89 0.82 0.21 1.10 1.31 2.28 0.77 1.00 1.51
      #13 2.27 0.75 1.00 0.86 0.81 0.25 1.28 1.52 2.45 0.72 1.00 1.73
      #14 2.23 0.78 1.00 0.89 0.83 0.21 1.24 1.45 2.42 0.75 1.00 1.67
      #15 2.29 0.80 1.00 0.89 0.85 0.20 1.29 1.49 2.50 0.77 1.00 1.72
      #16 2.12 0.81 1.00 0.91 0.85 0.18 1.12 1.30 2.32 0.79 1.00 1.53
      #17 2.18 0.80 1.00 0.89 0.84 0.20 1.18 1.38 2.39 0.77 1.00 1.61
      #18 2.22 0.81 1.00 0.87 0.84 0.19 1.22 1.41 2.38 0.78 1.00 1.60
      下载: 导出CSV
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    • 收稿日期:  2021-07-09
    • 刊出日期:  2022-02-25

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