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    涪陵焦石坝地区页岩气赋存特征定量表征及其主控因素

    王进 包汉勇 陆亚秋 柳筠 张梦吟

    王进, 包汉勇, 陆亚秋, 柳筠, 张梦吟, 2019. 涪陵焦石坝地区页岩气赋存特征定量表征及其主控因素. 地球科学, 44(3): 1001-1011. doi: 10.3799/dqkx.2018.388
    引用本文: 王进, 包汉勇, 陆亚秋, 柳筠, 张梦吟, 2019. 涪陵焦石坝地区页岩气赋存特征定量表征及其主控因素. 地球科学, 44(3): 1001-1011. doi: 10.3799/dqkx.2018.388
    Wang Jin, Bao Hanyong, Lu Yaqiu, Liu Yun, Zhang Mengyin, 2019. Quantitative Characterization and Main Controlling Factors of Shale Gas Occurrence in Jiaoshiba Area, Fuling. Earth Science, 44(3): 1001-1011. doi: 10.3799/dqkx.2018.388
    Citation: Wang Jin, Bao Hanyong, Lu Yaqiu, Liu Yun, Zhang Mengyin, 2019. Quantitative Characterization and Main Controlling Factors of Shale Gas Occurrence in Jiaoshiba Area, Fuling. Earth Science, 44(3): 1001-1011. doi: 10.3799/dqkx.2018.388

    涪陵焦石坝地区页岩气赋存特征定量表征及其主控因素

    doi: 10.3799/dqkx.2018.388
    基金项目: 

    国家科技重大专项 2016ZX05060-001

    详细信息
      作者简介:

      王进(1986-), 男, 高级工程师, 硕士, 从事页岩气地质研究工作

    • 中图分类号: P618.13

    Quantitative Characterization and Main Controlling Factors of Shale Gas Occurrence in Jiaoshiba Area, Fuling

    • 摘要: 为解决页岩气开发过程中,单井实测含气量与测试产量存在明显矛盾的问题,系统开展了测井解释含气量和实测含气量的对比研究,认为在焦石坝地区使用测井解释含气量来代替实测含气量是可行的.在详细对比有机质丰度、有机质成熟度、孔隙结构、地层温度和压力等对页岩含气量影响的基础上,明确孔隙结构是控制页岩气赋存特征的主要因素.对涪陵焦石坝地区而言,由于纵向有机质丰度差异而带来的孔径和孔隙度等孔隙结构的不同是导致上、下部气层赋存状态变化的主要原因.对中国南方海相页岩开发选区评价而言,在今后的开发选区过程中,应更加注重开展页岩孔隙结构对赋存状态的影响研究.

       

    • 图  1  涪陵焦石坝地区焦页A井五峰-龙马溪组孔隙特征柱状图

      Fig.  1.  Stratigraphic column of pore characteristics from Wufeng-Longmaxi Formation of Well JY A in Jiaoshiba area, Fuling

      图  2  涪陵焦石坝地区单井实测含气量与单井测试产量相关关系

      Fig.  2.  Correlation between measured gas content of single well and single well test yield in Jiaoshiba area, Fuling

      图  3  涪陵焦石坝地区不同钻井时期单井实测含气量直方图

      Fig.  3.  Histogram of measured gas content in single well in different drilling periods in Jiaolingba area, Fuling

      图  4  焦页B井TOC与吸附气含量交会图

      Fig.  4.  Intersection diagram between TOC and adsorbed gas content of Well JY B

      图  5  涪陵地区探井测试产量与测井解释含气量相关关系

      Fig.  5.  Correlation between test yield and gas content in exploratory well logging in Fuling area

      图  6  焦石坝地区取心井实测有机质丰度纵向分布

      Fig.  6.  Longitudinal distribution of measured organic matter abundance in the core well of Jiaoshiba area

      图  7  涪陵地区焦页K井五峰-龙马溪组上、下部气层孔隙类型

      a.纳米级有机质孔隙,下部气层;b.纳米级微裂隙,上部气层

      Fig.  7.  Pore types of the upper and lower gas layers of Wufeng-Longmaxi Formation of Well JY K in Fuling area

      图  8  焦石坝地区埋深与有机质成熟度相关关系

      Fig.  8.  Correlation between buried depth and organic matter maturity in Jiaoshiba area

      图  9  焦页A井孔隙度与总含气量相关关系

      Fig.  9.  Correlation between porosity and total gas content in Well JY A

      图  10  焦页A井各小层孔径分布曲线

      ⑨2 530.6 m, TOC=0.62%, Vsh=60.97%;⑧2 552.7 m, TOC=1.61%, Vsh=48.97%;⑦2 565.9 m, TOC=1.52%, Vsh=39.38%;⑥2 574.0 m, TOC=1.58%, Vsh=39.81%;⑤2 584.7 m, TOC=2.49%, Vsh=37.31%;④2 594.7 m, TOC=2.48%, Vsh=32.63%;③2 607.0 m, TOC=3.53%, Vsh=29.90%;①2 618.8 m, TOC=4.22%, Vsh=23.65%

      Fig.  10.  Pore size distribution curves of each small layer of Well JY A

      图  11  焦页A井不同小层比表面积和孔体积对比

      Fig.  11.  Comparison of specific surface area and pore volume of different layers of Well JY A

      图  12  焦页A井比表面积与吸附气含量相关关系

      Fig.  12.  Correlation of specific surface area and adsorbed gas of Well JY A

      图  13  孔径与孔体积变化率的相关关系

      Fig.  13.  Correlation between aperture and change rate of the pore volume

      图  14  游离气含量与孔隙体积相关关系

      Fig.  14.  Correlation between free gas content and pore volume

      表  1  涪陵焦石坝地区取心井优质页岩段实测含气量

      Table  1.   Statistical data of measured gas content in high-quality shale of core wells in Jiaoshiba area, Fuling

      井号 层位 实测含气量
      (m3/t)
      解析气量
      (m3/t)
      损失气量
      (m3/t)
      测井解释
      (m3/t)
      单井测试产量
      (104m3/d)
      焦页A井 五峰-龙马溪组①~⑤小层 3.33 1.00 2.33 5.03 10.5
      焦页B井 2.84 1.00 1.84 5.80 20.3
      焦页C井 2.33 0.97 1.36 6.46 33.7
      焦页D井 2.47 1.02 1.45 5.32 10.1
      焦页E井 3.00 1.02 1.98 6.51 27.9
      焦页F井 3.73 1.05 2.68 4.37 6.6
      焦页G井 3.61 1.03 2.58 5.27 20.8
      焦页H井 4.32 1.54 2.78 5.18 8.9
      焦页Ⅰ井 3.05 1.98 1.07 4.27 0.1
      焦页J井 5.19 1.11 4.08 5.93 21.1
      下载: 导出CSV

      表  2  焦页B井等温吸附试验数据

      Table  2.   Isothermal adsorption test data of Well JY B

      样品编号 井深
      (m)
      层位 实测
      TOC
      (%)
      方法一(校正)计算吸附气量(m3/t) 方法二计算吸附气量(m3/t)
      1 2 330.46 龙马溪组 1.11 1.01 0.93
      2 2 355.13 龙马溪组 1.62 1.35 1.32
      3 2 363.40 龙马溪组 1.47 1.18 1.20
      4 2 385.42 龙马溪组 3.59 2.77 2.83
      5 2 397.13 龙马溪组 3.46 2.45 2.73
      6 2 414.88 五峰组 4.97 3.32 3.48
      下载: 导出CSV

      表  3  焦页A、B、C井含气页岩段测井解释含气量分段统计

      Table  3.   Statistical data of log interpretation of gas content of gas-bearing shale section in wells JYA, JYB, JYC

      井号 小层号 顶深(m) 底深(m) 厚度(m) 总气量(m3/t) 吸附气(m3/t) 游离气(m3/t) 吸附气:游离气
      焦页A井 ⑧、⑨ 2 519.2 2 563.3 44.1 1.7 0.9 0.8 53:47
      ⑥、⑦ 2 563.3 2 579.5 16.2 2.9 1.2 1.7 41:59
      ④、⑤ 2 579.5 2 599.5 20.0 4.3 1.8 2.6 40:60
      ①、②、③ 2 599.5 2 622.0 22.5 7.2 2.7 4.5 37:63
      焦页B井 ⑧、⑨ 2 326.5 2 353.5 27.0 2.4 1.2 1.2 50:50
      ⑥、⑦ 2 353.5 2 377.5 24.0 3.4 1.4 2.0 41:59
      ④、⑤ 2 377.5 2 398.0 20.5 5.6 2.2 3.5 39:61
      ①、②、③ 2 398.0 2 415.5 17.5 8.7 3.1 5.6 36:64
      焦页C井 ⑧、⑨ 2 476.8 2 511.2 34.4 2.2 1.0 1.2 45:55
      ⑥、⑦ 2 511.2 2 534.6 23.4 3.1 1.3 1.8 42:58
      ④、⑤ 2 534.6 2 554.7 20.1 5.1 1.9 3.2 37:63
      ①、②、③ 2 554.7 2 575.0 20.3 7.4 2.7 4.7 36:64
      下载: 导出CSV

      表  4  涪陵焦石坝地区焦页A井五峰-龙马溪组龙一段页岩孔径分布数据

      Table  4.   Pore size data of Long 1 Member of Wufeng-Longmaxi Formation in Well JY A in Jiaoshiba area, Fuling

      井深(m) 层位 不同孔径孔隙所占总孔隙体积 峰值孔隙直径(nm)
      <2 nm 2~50 nm >50 nm
      2 530.80 17.26 74.01 8.73 3.56
      2 546.08 1.74 95.43 2.83 3.59
      2 566.09 16.16 79.22 4.62 3.65
      2 574.31 15.76 80.38 3.86 3.68
      2 582.19 / 95.18 4.82 3.97
      2 596.02 12.68 84.25 3.07 4.15
      2 608.70 / 97.78 2.22 4.92
      2 620.66 / 97.91 2.09 5.92
      下载: 导出CSV
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    • 收稿日期:  2018-12-12
    • 刊出日期:  2019-03-15

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