Abstract The effects of confinement and electrostatic interactions on the ion diffusion in the particle-rock contact area yields a delay in particle detachment during low-salinity water injection in porous media. The objective of the work is laboratory and mathematical modelling of the effects of delayed particle detachment on colloid-suspension transport in porous media. We present the governing system for single-phase particulate flow accounting for non-equilibrium fines detachment. The exact solution for one-dimensional flow with varying salinity is derived. Laboratory coreflood tests on low-salinity water injection are performed. The measured breakthrough fine particle concentration and pressure drop across the core are matched by the analytical model with high accuracy. Introduction of delay in the model removes the concentration shocks present in the instant fines detachment model as fines detach continuously throughout the injection period.

中文翻译：

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具有延迟细粒脱离的胶体悬浮流：分析模型和实验室研究

摘要 约束和静电相互作用对颗粒-岩石接触区离子扩散的影响导致在多孔介质中低矿化度注水过程中颗粒脱离的延迟。这项工作的目标是对多孔介质中延迟颗粒脱离对胶体-悬浮液输运的影响进行实验室和数学建模。我们提出了用于考虑非平衡细粒脱离的单相颗粒流的控制系统。导出了具有变化盐度的一维流动的精确解。对低矿化度注水进行了实验室岩心注水试验。测得的穿透细颗粒浓度和穿过岩心的压降与分析模型具有高精度匹配。