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DOI	10.1016/j.advwatres.2020.103584
	Experimental study on the displacement patterns and the phase diagram of immiscible fluid displacement in three-dimensional porous media
	Hu Y.; Patmonoaji A.; Zhang C.; Suekane T.
发表日期	2020
ISSN	0309-1708
卷号	140
英文摘要	The immiscible fluid displacement pattern, controlled by the balance of viscous and capillary forces has a significant effect on the recovery or storage efficiency in subsurface processes. The phase diagram of displacement patterns has been extensively studied for the two-dimensional (2D) micromodel; however, that of the three-dimensional (3D) porous media has received little attention. This work experimentally studied the immiscible drainage displacement in an unconsolidated packed bed at the pore scale with a wide range of capillary number Ca and viscosity ratio M using X-ray micro-tomography. Three typical displacement patterns, namely viscous fingering, capillary fingering, and stable displacement, were observed in 3D porous media. The rough location of three displacement patterns on the Ca–M diagram was consistent with previous studies in 2D micromodel. The boundaries for three regimes were determined based on the quantitative analyses of the saturation distribution as functions of Ca and M. Compared with the result in 2D micromodel, a broader transition zone between different regimes was found in 3D porous media. The characterizations of finger structures (e.g. fractal dimension and finger width) were applied to reveal the mechanism of how the injected fluid invades the pores and throats inside porous media for different displacement patterns. The average fractal dimension of capillary fingerings was 2.58 ± 0.05, which agrees with the 2.55 defined by the invasion percolation theory. For the viscous fingering, where the viscous force dominates the invasion process, the invading fluid follows a several preferential flow paths in the same direction as the injection and the finger width was only 1 to 2 pore bodies. Besides, the invasion dynamics under continuous injection conditions were compared for typical viscous and capillary fingerings. This study may improve our understanding of the dynamics of displacement processes jointly governed by the viscous/capillary forces in 3D porous media. Furthermore, the phase diagram under various conditions (i.e. a wide range of Ca and M) can help to find a suitable reservoir conditions for subsurface processes. © 2020 Elsevier Ltd
关键词	Distribution functions Fractal dimension Groundwater flow Packed beds Percolation (solid state)Phase diagrams Solvents Continuous injections Displacement patterns Displacement process Invasion percolation Saturation distribution Threedimensional (3-d)Two Dimensional (2 D)X-ray micro tomographies Porous materials diagram displacement experimental study immiscible fluid porous medium quantitative analysis saturation three-dimensional flow
语种	英语
来源机构	Advances in Water Resources
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/131808
推荐引用方式 GB/T 7714	Hu Y.,Patmonoaji A.,Zhang C.,et al. Experimental study on the displacement patterns and the phase diagram of immiscible fluid displacement in three-dimensional porous media[J]. Advances in Water Resources,2020,140.
APA	Hu Y.,Patmonoaji A.,Zhang C.,&Suekane T..(2020).Experimental study on the displacement patterns and the phase diagram of immiscible fluid displacement in three-dimensional porous media.,140.
MLA	Hu Y.,et al."Experimental study on the displacement patterns and the phase diagram of immiscible fluid displacement in three-dimensional porous media".140(2020).