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致密砂岩储层流体差异性赋存特征——以鄂尔多斯盆地三叠系延长组为例

张亚东 高光辉 刘正鹏 廖海于 汪广轮 丁长灿 马宏伟 李泽亮

张亚东, 高光辉, 刘正鹏, 廖海于, 汪广轮, 丁长灿, 马宏伟, 李泽亮. 致密砂岩储层流体差异性赋存特征——以鄂尔多斯盆地三叠系延长组为例[J]. 石油实验地质, 2021, 43(6): 1024-1030. doi: 10.11781/sysydz2021061024
引用本文: 张亚东, 高光辉, 刘正鹏, 廖海于, 汪广轮, 丁长灿, 马宏伟, 李泽亮. 致密砂岩储层流体差异性赋存特征——以鄂尔多斯盆地三叠系延长组为例[J]. 石油实验地质, 2021, 43(6): 1024-1030. doi: 10.11781/sysydz2021061024
ZHANG Yadong, GAO Guanghui, LIU Zhengpeng, LIAO Haiyu, WANG Guanglun, DING Changcan, MA Hongwei, LI Zeliang. Differential characteristics of fluid occurrence in tight sandstone reservoirs: a case study of Triassic Yanchang Formation in Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2021, 43(6): 1024-1030. doi: 10.11781/sysydz2021061024
Citation: ZHANG Yadong, GAO Guanghui, LIU Zhengpeng, LIAO Haiyu, WANG Guanglun, DING Changcan, MA Hongwei, LI Zeliang. Differential characteristics of fluid occurrence in tight sandstone reservoirs: a case study of Triassic Yanchang Formation in Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2021, 43(6): 1024-1030. doi: 10.11781/sysydz2021061024

致密砂岩储层流体差异性赋存特征——以鄂尔多斯盆地三叠系延长组为例

doi: 10.11781/sysydz2021061024
基金项目: 

国家自然科学基金项目 51974253

陕西省教育厅重点项目 18JS084

陕西省高校科协青年人才托举计划 20180703

详细信息
    作者简介:

    张亚东(1978-), 男, 高级工程师, 从事油气勘探研究。E-mail: zyd1_cq@petrochina.com.cn

    通讯作者:

    廖海于(1986-), 男, 工程师, 从事油气勘探研究。E-mail: liaohy1_cq@petrochina.com.cn

  • 中图分类号: TE122.2

Differential characteristics of fluid occurrence in tight sandstone reservoirs: a case study of Triassic Yanchang Formation in Ordos Basin

  • 摘要: 为探讨致密砂岩油藏储层流体差异性赋存特征,以鄂尔多斯盆地HQ地区三叠系延长组长6、长8油层组及HS地区长6、长8油层组为研究对象,利用核磁共振技术、高速离心实验,按渗透率区间、地区、目的层层位定量分析储层岩石可动流体含量、不同级别喉道控制的可流动孔隙空间等储层流体差异性赋存特征。不同渗透性级别的储层中,不仅总可动流体饱和度差异较大,而且可动流体赋存的喉道区间也存在较大差异。渗透性好,可动流体由较大喉道控制;渗透性差,可动流体主要由较小喉道控制。在较小喉道半径区间(小于临界喉道半径),随喉道半径增大,可动流体饱和度增加;在较大喉道半径区间(大于临界喉道半径),随喉道半径增加,可动流体饱和度降低。渗透性越好的样品,其临界喉道半径越大。不同地区、不同层位,总可动流体饱和度值由高到低的顺序依次为HQ长8、HS长8、HQ长6、HS长6。

     

  • 图  1  典型岩心样品饱和水状态及不同离心力离心后T2谱特征

    Figure  1.  Saturated water state in core and T2 spectrum after centrifugation under different centrifugal forces

    图  2  可动流体饱和度与气测渗透率、水测孔隙度关系

    Figure  2.  Relationship between movable fluid saturation and gas permeability and water porosity

    图  3  不同喉道半径区间可动流体饱和度

    Figure  3.  Movable fluid saturation at different throat radius intervals

    表  1  实验岩心资料及实验结果

    Table  1.   Experimental core data and results

    样号 地区 层位 长度/cm 直径/cm 氮气测孔隙度/% 氮气测渗透率/10-3μm2 水测孔隙度/% 不同喉道区间对应的可动流体饱和度/%
    有效喉道(>0.05 μm) 0.05~ 0.07 μm 0.07~ 0.10 μm 0.10~ 0.20 μm 0.20~ 0.50 μm 0.50~ 1.00 μm >1.00 μm
    1 HQ 长6 3.225 2.514 12.3 0.058 12.1 31.28 6.10 9.51 9.57 3.50 1.25 1.34
    2 HQ 长8 3.113 2.516 7.8 0.063 7.5 25.52 4.26 8.82 8.51 2.40 0.88 0.65
    3 HQ 长8 3.265 2.510 15.2 2.350 14.5 63.94 2.22 3.17 8.76 11.11 13.93 24.76
    4 HQ 长8 3.188 2.514 15.5 1.700 14.6 62.97 3.69 4.48 9.24 15.83 14.76 14.98
    5 HQ 长8 3.135 2.513 13.8 1.280 12.7 60.91 2.31 3.05 7.70 14.82 15.45 17.58
    6 HS 长8 3.187 2.510 11.2 0.182 10.5 49.56 3.01 4.99 10.85 12.77 15.01 2.94
    7 HS 长8 3.245 2.508 9.0 0.137 8.8 46.83 2.51 5.89 17.49 16.33 3.56 1.05
    8 HQ 长6 3.255 2.510 13.7 0.159 13.7 45.02 3.46 5.68 12.41 17.86 4.98 0.63
    9 HQ 长6 3.221 2.512 12.6 0.170 12.6 45.78 3.11 6.51 9.96 16.46 8.73 1.02
    10 HQ 长8 3.206 2.513 9.4 0.710 9.6 64.16 2.85 5.30 11.14 19.98 16.87 8.01
    11 HQ 长8 3.233 2.515 8.8 0.570 8.8 65.67 1.76 5.28 12.08 18.37 18.36 9.82
    12 HQ 长8 3.212 2.513 8.3 0.313 8.4 60.79 1.90 8.48 15.25 24.50 5.28 5.38
    13 HQ 长6 3.197 2.510 11.4 0.147 11.5 52.23 4.22 8.33 16.24 21.91 1.49 0.04
    14 HQ 长6 3.183 2.515 8.8 0.029 9.1 27.11 6.94 7.29 8.09 2.33 0.63 1.83
    15 HQ 长6 3.123 2.516 10.3 0.036 10.4 22.51 4.05 11.13 6.10 0.55 0.47 0.21
    16 HQ 长6 3.212 2.515 9.8 0.047 10.2 31.48 5.77 8.87 10.93 3.94 0.94 1.02
    17 HQ 长6 3.200 2.511 8.7 0.058 9.3 38.40 4.84 7.34 18.12 6.70 0.58 0.81
    18 HQ 长6 3.076 2.515 10.3 0.116 10.2 47.56 4.21 7.97 13.32 12.16 9.64 0.25
    19 HQ 长6 3.208 2.516 9.7 0.062 9.6 32.58 7.23 6.43 12.81 3.22 2.39 0.50
    20 HQ 长6 3.244 2.515 11.3 0.063 11.4 31.84 5.54 9.63 9.10 3.05 1.03 3.48
    21 HQ 长6 3.121 2.516 11.0 0.034 10.9 27.47 5.03 7.61 9.17 1.84 2.13 1.69
    22 HQ 长6 3.208 2.515 13.9 4.520 13.8 63.13 0.86 3.63 6.87 8.29 10.29 33.20
    23 HS 长6 3.156 2.519 6.8 0.010 7.0 16.27 3.94 5.96 1.77 1.16 1.28 2.17
    24 HS 长6 3.260 2.520 7.8 0.012 7.9 18.60 5.77 9.38 0.99 1.20 0.40 0.86
    25 HS 长6 3.224 2.519 6.9 0.013 7.1 11.72 3.28 4.27 2.03 0.63 0.84 0.67
    26 HS 长6 3.205 2.520 10.7 0.044 10.5 37.29 7.06 12.59 13.01 1.32 0.84 2.48
    27 HS 长6 3.268 2.520 10.4 0.039 10.5 37.97 7.28 12.52 14.40 1.54 1.30 0.93
    28 HS 长6 3.200 2.520 10.3 0.036 10.2 32.65 4.11 13.10 10.54 3.14 1.61 0.13
    29 HS 长6 3.226 2.519 9.5 0.032 9.1 23.01 9.64 5.66 5.42 0.48 0.62 1.19
    30 HS 长6 3.243 2.520 9.5 0.056 9.3 30.95 5.95 10.99 11.18 0.82 0.39 1.62
    31 HS 长6 3.212 2.518 10.8 0.135 10.7 42.83 4.50 9.15 16.26 8.97 1.13 2.82
    32 HS 长6 3.134 2.518 8.8 0.160 8.9 26.45 4.63 10.25 5.72 1.49 1.09 3.28
    注:不同喉道区间对应的可动流体饱和度为可流动孔隙空间与岩心总孔隙空间的比值。
    下载: 导出CSV

    表  2  离心力与喉道半径的对应关系及典型样品临界喉道半径

    Table  2.   Relationship between centrifugal force and throat radius and threshhold value of throat radius of typical samples

    离心力大小与喉道半径对应关系 不同渗透率样品对应的临界喉道半径
    离心力/psi 喉道半径/μm 典型样号 典型样品渗透率/10-3 μm2 渗透率区间/10-3 μm2 临界喉道半径区间/ μm
    21 1.00 4 1.700 1.0~2.0 >1.0
    42 0.50 10 0.710 0.7~1.0 0.2~0.5
    104 0.20 11 0.570 0.5~0.7 0.5~1.0
    209 0.10 12 0.313 0.3~0.5 0.2~0.5
    300 0.07 13 0.147 0.1~0.3 0.2~0.5
    417 0.05 14 0.029 < 0.1 0.1~0.2
    下载: 导出CSV

    表  3  按渗透率区间统计的实验结果

    Table  3.   Statistical results of experiments by permeability intervals

    渗透率/10-3μm2 样品数 不同喉道区间对应的可动流体饱和度/%
    0.05~0.07 μm 0.07~0.10 μm 0.10~0.20 μm 0.20~0.50 μm 0.50~1.00 μm >1.00 μm 有效喉道(>0.05 μm)
    >1.0 4 $\frac{0.86 \sim 3.69}{2.27}$ $\frac{3.05 \sim 4.48}{3.59}$ $\frac{6.87 \sim 9.24}{8.14}$ $\frac{8.29 \sim 15.83}{12.51}$ $\frac{10.29 \sim 15.45}{13.61}$ $\frac{14.98 \sim 33.20}{22.63}$ $\frac{60.91 \sim 63.94}{62.74}$
    0.3~1.0 3 $\frac{1.76 \sim 2.85}{2.17}$ $\frac{5.28 \sim 8.48}{6.35}$ $\frac{11.14 \sim 15.25}{12.82}$ $\frac{18.37 \sim 24.50}{20.95}$ $\frac{5.28 \sim 18.36}{13.50}$ $\frac{5.38 \sim 9.82}{7.74}$ $\frac{60.79 \sim 65.67}{63.54}$
    0.1~0.3 8 $\frac{2.51 \sim 4.63}{3.71}$ $\frac{4.99 \sim 10.25}{7.35}$ $\frac{5.72 \sim 17.49}{12.78}$ $\frac{1.49 \sim 21.91}{13.49}$ $\frac{1.09 \sim 15.01}{5.70}$ $\frac{0.036 \sim 3.28}{1.50}$ $\frac{26.45 \sim 52.23}{44.53}$
    <0.1 17 $\frac{3.28 \sim 9.64}{5.69}$ $\frac{4.27 \sim 13.10}{8.89}$ $\frac{0.99 \sim 18.12}{8.93}$ $\frac{0.48 \sim 6.70}{2.23}$ $\frac{0.39 \sim 2.39}{1.03}$ $\frac{0.13 \sim 3.48}{1.27}$ $\frac{11.72 \sim 38.40}{28.04}$
    注:可动流体饱和度指可流动孔隙空间百分数,表中分式意义为:$\frac{\text { 最小值 } \sim \text { 最大值 }}{\text { 平均值 }}$,表 4表 5表 6中的分式意义相同。
    下载: 导出CSV

    表  4  按地区统计的实验结果

    Table  4.   Statistical results of experiments by regions

    地区 样品数 不同喉道区间对应的可动流体饱和度/%
    0.05~0.07 μm 0.07~0.10 μm 0.10~0.20 μm 0.20~0.50 μm 0.50~1.00 μm >1.00 μm 有效喉道(>0.05 μm)
    HQ 20 $\frac{0.86 \sim 7.23}{4.02}$ $\frac{3.05 \sim 11.13}{6.93}$ $\frac{6.10 \sim 18.12}{10.77}$ $\frac{0.55 \sim 24.50}{10.44}$ $\frac{0.47 \sim 18.36}{6.50}$ $\frac{0.036 \sim 33.20}{6.36}$ $\frac{22.51 \sim 65.67}{45.02}$
    HS 12 $\frac{2.51 \sim 9.64}{5.14}$ $\frac{4.27 \sim 13.10}{8.73}$ $\frac{0.99 \sim 17.49}{9.14}$ $\frac{0.48 \sim 16.33}{4.15}$ $\frac{0.39 \sim 15.01}{2.34}$ $\frac{0.13 \sim 3.28}{1.68}$ $\frac{11.72 \sim 49.56}{31.18}$
    下载: 导出CSV

    表  5  按层位统计的实验结果

    Table  5.   Statistical results of experiments by horizons

    层位 样品数 不同喉道区间对应的可动流体饱和度/%
    0.05~0.07 μm 0.07~0.10 μm 0.10~0.20 μm 0.20~0.50 μm 0.50~1.00 μm >1.00 μm 有效喉道(>0.05 μm)
    长6 23 $\frac{0.86 \sim 9.64}{5.11}$ $\frac{3.63 \sim 13.10}{8.43}$ $\frac{0.99 \sim 18.12}{9.74}$ $\frac{0.48 \sim 21.91}{5.33}$ $\frac{0.39 \sim 10.29}{2.35}$ $\frac{0.036 \sim 33.20}{2.70}$ $\frac{11.72 \sim 63.13}{33.66}$
    长8 9 $\frac{1.76 \sim 4.26}{2.72}$ $\frac{3.05 \sim 8.82}{5.50}$ $\frac{7.70 \sim 17.49}{11.22}$ $\frac{2.40 \sim 24.50}{15.12}$ $\frac{0.88 \sim 18.36}{11.57}$ $\frac{0.65 \sim 24.76}{9.46}$ $\frac{25.52 \sim 65.67}{55.59}$
    下载: 导出CSV

    表  6  按地区层位统计的实验结果

    Table  6.   Statistical results of experiments by regions and horizons

    地区 层位 样品数 不同喉道区间对应的可动流体饱和度/%
    0.05~0.07 μm 0.07~0.10 μm 0.10~0.20 μm 0.20~0.50 μm 0.50~1.00 μm >1.00 μm 有效喉道(>0.05 μm)
    HQ 长6 13 $\frac{0.86 \sim 7.23}{4.72}$ $\frac{3.63 \sim 11.13}{7.69}$ $\frac{6.10 \sim 18.12}{10.98}$ $\frac{0.55 \sim 21.91}{7.83}$ $\frac{0.47 \sim 10.29}{3.43}$ $\frac{0.036 \sim 33.20}{3.54}$ $\frac{22.51 \sim 63.13}{38.18}$
    HQ 长8 7 $\frac{1.76 \sim 4.26}{2.71}$ $\frac{3.05 \sim 8.82}{5.51}$ $\frac{7.70 \sim 15.25}{10.38}$ $\frac{2.40 \sim 24.50}{15.29}$ $\frac{0.88 \sim 18.36}{12.22}$ $\frac{0.65 \sim 24.76}{11.60}$ $\frac{25.52 \sim 65.67}{57.71}$
    HS 长6 10 $\frac{3.28 \sim 9.64}{5.61}$ $\frac{4.27 \sim 13.10}{9.39}$ $\frac{0.99 \sim 16.26}{8.13}$ $\frac{0.48 \sim 8.97}{2.08}$ $\frac{0.39 \sim 1.61}{0.95}$ $\frac{0.13 \sim 3.28}{1.62}$ $\frac{11.72 \sim 42.83}{27.77}$
    HS 长8 2 $\frac{2.51 \sim 3.01}{2.76}$ $\frac{4.99 \sim 5.89}{5.44}$ $\frac{10.85 \sim 17.49}{14.17}$ $\frac{12.77 \sim 16.33}{14.55}$ $\frac{3.56 \sim 15.01}{9.28}$ $\frac{1.05 \sim 2.94}{1.99}$ $\frac{46.83 \sim 49.56}{48.19}$
    下载: 导出CSV
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    [15] LIU Dengke, SUN Wei, REN Dazhong, et al. Quartz cement origins and impact on storage performance in Permian Upper Shihezi Formation tight sandstone reservoirs in the northern Ordos Basin, China[J]. Journal of Petroleum Science and Engineering, 2019, 178: 485-496.
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出版历程
  • 收稿日期:  2020-01-08
  • 修回日期:  2021-08-23
  • 刊出日期:  2021-11-28

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