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    核磁共振技术在非常规油气藏的应用基础

    杨正明 张亚蒲 李海波 郑兴范 雷启鸿

    杨正明, 张亚蒲, 李海波, 郑兴范, 雷启鸿, 2017. 核磁共振技术在非常规油气藏的应用基础. 地球科学, 42(8): 1333-1339. doi: 10.3799/dqkx.2017.506
    引用本文: 杨正明, 张亚蒲, 李海波, 郑兴范, 雷启鸿, 2017. 核磁共振技术在非常规油气藏的应用基础. 地球科学, 42(8): 1333-1339. doi: 10.3799/dqkx.2017.506
    Yang Zhengming, Zhang Yapu, Li Haibo, Zheng Xingfan, Lei Qihong, 2017. Application Basis of Nuclear Magnetic Resonance Technology in the Unconventional Reservoirs. Earth Science, 42(8): 1333-1339. doi: 10.3799/dqkx.2017.506
    Citation: Yang Zhengming, Zhang Yapu, Li Haibo, Zheng Xingfan, Lei Qihong, 2017. Application Basis of Nuclear Magnetic Resonance Technology in the Unconventional Reservoirs. Earth Science, 42(8): 1333-1339. doi: 10.3799/dqkx.2017.506

    核磁共振技术在非常规油气藏的应用基础

    doi: 10.3799/dqkx.2017.506
    基金项目: 

    国家科技重大专项 2017ZX05013-001

    中国石油天然气集团公司重大基础科技攻关课题 2014B-1203

    详细信息
      作者简介:

      杨正明(1969-), 男, 高级工程师, 主要从事低渗/致密油气田物理模拟、渗流理论和三次采油方面的研究工作

    • 中图分类号: P631

    Application Basis of Nuclear Magnetic Resonance Technology in the Unconventional Reservoirs

    • 摘要: 核磁共振技术在非常规油气藏应用解释中有较多争议.结合渗流流体的概念,提出了针对核磁共振图谱解释流体动用性质的新方法,并应用于非常规油气藏.研究表明:致密油和致密砂岩气藏岩心的核磁共振图谱左峰和右峰是连续而不是截然分开的,说明难动用流体与易动用流体的性质是连续渐变的,不是独立分开的;而页岩和煤层气藏岩心核磁共振图谱则反之.在非常规油气藏岩心中,难动用流体占主导地位,致密油和致密砂岩气藏岩心的易动用流体多于页岩和煤层气藏岩心.致密油和致密砂岩气藏的采出程度提高取决于易动用流体的采出;而页岩和煤层气藏的采出程度提高则取决于难动用流体的采出.

       

    • 图  1  饱和水及不同离心力条件下典型致密油岩样核磁共振谱

      图中红线的左边为难动用流体;红线的右边为易动用流体

      Fig.  1.  NMR spectrum of water saturated and after different centrifugal force in typical tight oil sample

      图  2  不同渗透率致密油岩样的核磁共振图谱

      Fig.  2.  NMR spectrum in different permeability cores from tight oil reservoir

      图  3  不同渗透率致密砂岩气藏岩样的核磁共振图谱

      Fig.  3.  NMR spectrum in different permeability cores from tight sandstone gas reservoir

      图  4  5块页岩气藏岩心核磁共振图谱

      Fig.  4.  NMR spectrum of 5 shale gas reservoir cores

      图  5  典型致密页岩岩样饱和水及不同离心力的核磁共振图谱

      Fig.  5.  NMR spectrum of water saturated and after different centrifugal force in typical shale samples

      图  6  5块煤层气藏岩心核磁共振图谱

      Fig.  6.  NMR spectrum of 5 CBM reservoir cores

      表  1  不同离心力下所采出易动用流体和难动用流体占总流体的百分数

      Table  1.   The percentage of body fluid and boundary fluid of total fluid produced by different centrifugal force

      离心力(MPa) 采出流体占总流体的百分数(%)
      易动用流体 难动用流体
      0.14 5.74 0.94
      0.27 19.42 2.39
      1.37 39.10 9.81
      2.74 44.15 13.66
      下载: 导出CSV

      表  2  5块实验样品的物性数据和测试结果

      Table  2.   The physical properties and test data of 5 experimental samples

      序号 长度(cm) 直径(cm) 孔隙度(%) 渗透率(mD) 易动用流体所占流体比例(%) 难动用流体所占流体比例(%)
      1 3.240 2.52 1.62 0.000 49 0.31 99.69
      2 2.520 2.46 7.79 0.012 00 23.38 76.62
      3 2.523 2.49 6.42 0.070 00 42.56 57.44
      4 2.520 2.48 6.54 0.167 00 51.15 48.85
      5 2.522 2.38 10.57 0.212 00 51.61 48.39
      下载: 导出CSV

      表  3  6块实验样品的物性数据和测试结果

      Table  3.   The physical properties and test data of 6 experimental samples

      序号 长度(cm) 直径(cm) 孔隙度(%) 渗透率(mD) 易动用流体所占流体比例(%) 难动用流体所占流体比例(%)
      1 3.240 2.52 1.62 0.001 2 0 100
      2 2.520 2.46 7.79 0.003 8 16.87 83.13
      3 2.523 2.49 6.42 0.011 0 35.50 64.50
      4 2.520 2.48 6.54 0.085 0 43.95 56.05
      5 2.522 2.38 10.57 0.120 0 45.26 54.74
      6 2.523 2.41 12.46 0.430 0 49.33 50.67
      下载: 导出CSV

      表  4  5块实验样品的物性数据和测试数据

      Table  4.   The physical properties and test data of 4 experimental samples

      序号 长度(cm) 直径(cm) 渗透率(mD) 易动用流体所占流体比例(%) 难动用流体所占流体比例(%)
      1 3.38 2.51 0.000 854 0 100
      2 3.25 2.52 0.002 968 1.97 98.03
      3 3.32 2.51 0.022 447 2.96 97.04
      4 3.33 2.51 0.121 304 3.52 96.48
      5 3.35 2.51 0.589 073 12.62 87.38
      下载: 导出CSV

      表  5  不同离心力下所采出易动用流体和难动用流体占总流体的百分数

      Table  5.   The percentage of body fluid and boundary fluid of total fluid produced by different centrifugal force

      离心力(MPa) 采出流体占总流体的百分数(%)
      易动用流体 难动用流体
      1.38 4.15 6.43
      2.06 7.73 14.23
      2.76 7.73 21.74
      下载: 导出CSV

      表  6  实验样品的物性数据及测试数据

      Table  6.   The physical properties and test data in different experimental samples

      岩心 井号 孔隙度(%) 渗透率(mD) 易动用流体所占流体比例(%) 难动用流体所占流体比例(%)
      1 晋试8井 1.36 0.088 4.61 95.39
      2 晋试9井 2.95 0.182 5.45 94.55
      3 晋试11井 4.70 0.781 7.42 92.58
      4 晋试12井 4.80 1.124 8.77 91.23
      5 晋试7井 2.23 1.824 21.17 78.83
      下载: 导出CSV

      表  7  不同类型油气藏核磁共振特征对比

      Table  7.   Comparison of NMR characteristics in different type reservoirs

      油气藏类型 T2谱特征 易动用流体比例 难动用流体比例
      致密油 连续的双峰或单峰 低或相对较高 高或相对较低
      致密砂岩气 连续的双峰或单峰 低或相对较高 高或相对较低
      页岩 单峰或不连续的双峰 很低或较低 很高或较高
      煤层气 单峰或不连续的双峰 很低或较低 很高或较高
      下载: 导出CSV
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