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多方法协同表征特低渗砂岩储层全孔径孔隙结构——以鄂尔多斯盆地合水地区砂岩储层为例

欧阳思琪 孙卫 黄何鑫

欧阳思琪, 孙卫, 黄何鑫. 多方法协同表征特低渗砂岩储层全孔径孔隙结构——以鄂尔多斯盆地合水地区砂岩储层为例[J]. 石油实验地质, 2018, 40(4): 595-604. doi: 10.11781/sysydz201804595
引用本文: 欧阳思琪, 孙卫, 黄何鑫. 多方法协同表征特低渗砂岩储层全孔径孔隙结构——以鄂尔多斯盆地合水地区砂岩储层为例[J]. 石油实验地质, 2018, 40(4): 595-604. doi: 10.11781/sysydz201804595
OUYANG Siqi, SUN Wei, HUANG Hexing. Multi-method synergistic characterization of total pore structure of extra-low permeability sandstone reservoirs: case study of the Heshui area of Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2018, 40(4): 595-604. doi: 10.11781/sysydz201804595
Citation: OUYANG Siqi, SUN Wei, HUANG Hexing. Multi-method synergistic characterization of total pore structure of extra-low permeability sandstone reservoirs: case study of the Heshui area of Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2018, 40(4): 595-604. doi: 10.11781/sysydz201804595

多方法协同表征特低渗砂岩储层全孔径孔隙结构——以鄂尔多斯盆地合水地区砂岩储层为例

doi: 10.11781/sysydz201804595
基金项目: 

国家科技重大专项“大型油气田及煤层气开发”(2011ZX05044)和国家自然科学基金(41702146)资助。

详细信息
    作者简介:

    欧阳思琪(1993-),女,硕士研究生,油气田开发地质方向。E-mail:geo_oysq@163.com。

  • 中图分类号: TE122.23

Multi-method synergistic characterization of total pore structure of extra-low permeability sandstone reservoirs: case study of the Heshui area of Ordos Basin

  • 摘要: 高压压汞、恒速压汞、核磁共振实验在表征特低渗透砂岩储层的微观孔隙结构时存在局限性,其结果与铸体薄片和扫描电镜观察到的特征吻合度不高。为了解决这一问题,更加精细地刻画孔喉分布特征,以鄂尔多斯盆地合水地区砂岩储层样品为例,提出了多方法协同表征全孔径孔喉结构的方法。利用高压压汞所得毛管压力曲线与核磁共振联合高压压汞计算所得的伪毛管压力曲线对比,根据喉道分类分别计算吸附喉、微喉、细微喉、中细喉对应的孔隙空间的连通比。根据核磁共振实验原理,利用公式实现横向弛豫时间向孔径的转换,公式中比表面积利用高压压汞计算,弛豫率利用恒速压汞对比核磁共振T2谱标定,将协同计算所得孔喉分布结果与对应的孔喉连通比相乘得到不同尺度喉道及孔隙连通空间分布曲线。结果显示:吸附喉连通比最低,其他类型的喉道连通比较高,且差异不大。喉道分布范围(0.003~3.661 μm)较恒速压汞结果变大,孔隙半径(0.8~91.4 μm)减小,孔喉比(16.4~58.6)减小,与铸体薄片与扫描电镜观察结果基本相符。说明多种方法协同计算一定程度上克服了高压压汞喉道与孔隙的叠加以及恒速压汞的计算误差,更接近于储层真实状态。

     

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出版历程
  • 收稿日期:  2017-12-18
  • 修回日期:  2018-07-03
  • 刊出日期:  2018-07-28

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