4.7 Article

Self-Regulation Mechanisms in Porous Media: The Origin of the Diversity of Fluid Displacement Patterns

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WATER RESOURCES RESEARCH
卷 59, 期 2, 页码 -

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AMER GEOPHYSICAL UNION
DOI: 10.1029/2022WR033443

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displacement pattern; minimum operating power principle; self-regulation mechanisms; inertial effect

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During two-phase fluid displacement in a porous medium, self-regulation mechanisms result in a diverse range of fluid displacement patterns, such as the introduction of a highly tortuous displacement channel, the appearance of the retention and development regions of the displaced phase, and the expansion of the displacement path area of the invading phase. These findings provide physical explanations for the underlying mechanisms controlling fluid displacement pattern transitions and the influence of inertial effects on the displacement patterns.
During two-phase fluid displacement in a porous medium, self-regulation mechanisms provide negative feedback to approach a state of minimum operating power. The versatility of these self-regulation mechanisms results in a large diversity of fluid displacement patterns. For example, the introduction of a highly tortuous displacement channel, the appearance of the retention and development regions of the displaced phase, and the expansion of the displacement path area of the invading phase are the macroscopic responses of the two-phase flow system to the self-regulation mechanisms under different constraints. These new findings provide compelling physical explanations for the underlying mechanisms governing fluid displacement pattern transitions and the influence of inertial effects on the displacement patterns.

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