The paper presents the methodology and results of coreflooding, taking into account the decrease in the permeability caused by the migration of natural colloids during fluid injection. As a porous medium, core samples of consolidated slightly clayey sandstone from one of the oil fields of the Komi Republic (Russia) were used. The coreflooding methodology implied a cyclic change in the injection rate and exclude the influence of other factors such as creep and chemical mobilization of colloids on permeability. It has been established that a decrease in pore pressure leads to a more intense decrease in permeability during injection, which most likely indicates additional mobilization of colloids. Analysis of the coreflooding results showed that porous media with lower permeability are more sensitive to colloid migration and pore pressure changes.

中文翻译：

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多孔介质的胶体诱导渗透率退化评估

本文介绍了岩心驱的方法和结果，同时考虑了流体注入过程中天然胶体迁移导致的渗透率降低。作为多孔介质，使用了来自科米共和国（俄罗斯）一个油田的固结轻粘土砂岩岩心样品。岩心驱方法暗示注入速率的循环变化，并排除了其他因素的影响，例如胶体的蠕变和化学迁移对渗透率的影响。已经确定，孔隙压力的降​​低会导致注入期间渗透率的更剧烈下降，这很可能表明胶体的额外流动。岩心驱结果分析表明，渗透率较低的多孔介质对胶体运移和孔隙压力变化更为敏感。