Wettability effect on oil recovery using rock-structured microfluidics,Lab on a Chip

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Wettability effect on oil recovery using rock-structured microfluidics
Lab on a Chip ( IF 6.1 ) Pub Date : 2022-11-14 , DOI: 10.1039/d1lc01115d
Junyi Yang ₁ , Marzieh Saadat _{1,

2} , Ilgar Azizov ₂ , Marcin Dudek ₂ , Gisle Øye ₂ , Peichun Amy Tsai ₁

Affiliation

Surface wettability has a crucial impact on drop splashing, emulsion dynamics, slip flow for drag reduction, fluid–fluid displacement, and various microfluidic applications. Targeting enhanced oil recovery (EOR) applications, we experimentally investigate the effect of matrix wettability on the invasion morphology and sweep efficiency of viscous oil displaced by different aqueous floods using microfluidics, whose porous network mimics a sandstone structure. For comparison, systematic experiments of the same oil–flood pair are done in both hydrophilic and hydrophobic microfluidic chips. The results show that the hydrophilic microfluidic rock has a remarkable increase in oil recovery by a factor of ≈1.44, compared to the hydrophobic case. In addition, we observe a more pronounced lateral growth of the displacing pattern of aqueous flood for the hydrophilic surface. Finally, we quantitatively explain the increasing factor in the recovery rate and finger width for the hydrophilic vs. hydrophobic rock-liked porous networks by incorporating the contact angle into a scaling analysis.

中文翻译：

使用岩石结构微流体的润湿性对采油的影响

表面润湿性对液滴飞溅、乳液动力学、减阻滑流、流体-流体置换和各种微流体应用具有至关重要的影响。针对提高石油采收率 (EOR) 应用，我们使用微流体实验研究基质润湿性对被不同水驱驱替的粘性油的侵入形态和波及效率的影响，其多孔网络模拟砂岩结构。为了进行比较，在亲水和疏水微流控芯片上进行了相同油驱对的系统实验。结果表明，与疏水性情况相比，亲水性微流控岩石的采油率显着提高了约 1.44 倍。此外，我们观察到亲水表面的水驱置换模式更明显的横向增长。最后，我们定量解释了亲水性回收率和手指宽度的增加因素与疏水类岩石多孔网络相比，通过将接触角纳入比例分析。

更新日期：2022-11-14

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