AN EXPERIMENTAL INVESTIGATION OF PORE-SCALE DISTRIBUTIONS OF NONAQUEOUS PHASE LIQUIDS AT RESIDUAL SATURATION
AN EXPERIMENTAL INVESTIGATION OF PORE-SCALE DISTRIBUTIONS OF NONAQUEOUS PHASE LIQUIDS AT RESIDUAL SATURATION
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DOI：
10.1007/bf00617511
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发表时间：
1993-01-01
影响因子：
2.7
通讯作者：
MILLER, CT
中科院分区：
文献类型：
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作者：
MAYER, AS;MILLER, CT
进行了一系列实验，分析了非水相液体(NAPL)气泡的尺寸分布随水相速度、NAPL密度和水相与NAPL之间的界面张力的变化。利用图像分析方法，在达到剩余饱和状态后，分析了模型单元中的斑点尺寸分布。平行于流动方向和平行于重力方向的斑点长度约为两个数量级，而斑点面积的变化约为三个数量级。形状因数是对斑点形状的衡量，在一个数量级上变化，中位数约为0.6。面积较小的斑点比面积较大的斑点出现的频率高得多。然而，少数较大的斑点贡献了模型细胞中总的NAPL饱和度的大部分。平行于重力方向的斑点长度和面积平方根的几何标准差与键数(Bo)成反比关系，在1.3×10(-2)<；Bo<；7.1×10(-2)。在3×10(-8)和3.1×10(-5)范围内，平行于流动方向和面积的斑点长度与毛细管数(Ca)呈弱负相关。
A set of experiments was conducted to analyze the size distribution of nonaqueous phase liquid (NAPL) blobs as a function of aqueous phase velocities, NAPL densities, and interfacial tension between the aqueous phase and the NAPL. Blob size distributions were analyzed in a model cell after a state of residual saturation was achieved, using image analysis methods. Blob lengths parallel to the direction of flow and parallel to the direction of gravity ranged over about two orders of magnitude, while blob areas varied over about three orders of magnitude. Form factors, which are a measure of blob shapes, varied over a single order of magnitude, with a median form factor of about 0.6. Blobs with smaller areas occurred much more frequently than larger blobs. However, the few larger blobs contributed to the majority of the total NAPL saturation in the model cell. The geometric standard deviations of blob length parallel to the direction of gravity and square root of area exhibited inverse relationships to Bond number (Bo), for 1.3 x 10(-2) < Bo < 7.1 x 10(-2). Blob length parallel to the direction of flow and area exhibited a weak inverse correlation with capillary number (Ca), for 3 x 10(-8) < Ca < 3.1 x 10(-5).