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Pore-scale visualization of polymer viscoelasticity using particle tracing in glass-silicon-glass micromodels

机译:在玻璃-硅-玻璃微模型中使用粒子跟踪的聚合物粘弹性的孔尺度可视化

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摘要

The several mechanisms concerning vis-coelasticity of aqueous polymer solu-tions used for EOR are in some ways misunderstood. Increasing viscosity as a result of increasing shear rate - known as 'Shear Thickening' - is one of those. Flooding experiments in Glass-Silicon-Glass (GSG) micromodels, resembling real porous media, contribute to under-standing of elastic turbulences, which people suspect is the main reason for this phenomenon, apart from viscoelastic properties. The focus of this work is on the investigation of viscoelasticity of polymer solutions by using particle tracing focusing on streamlines visualization in the pores during the flood. Photos and videos record different injection flow rates. Videos and pressure data are used subsequently for qualitative and quantitative flow behaviour characterization, with focus on elastic turbulence originated by injected polymer solutions. In addition, results are compared to the behaviour of a Newtonian fluid.
机译:关于用于EOR的水性聚合物溶液的粘弹性的几种机理在某些方面被误解了。其中之一就是由于剪切速率增加而导致的粘度增加(称为“剪切增稠”)。类似于真实多孔介质的玻璃-硅-玻璃(GSG)微观模型中的驱油实验有助于理解弹性湍流,人们认为,除了粘弹性以外,这也是造成这种现象的主要原因。这项工作的重点是研究聚合物溶液的粘弹性,方法是使用颗粒追踪技术,重点研究洪水期间孔隙中流线的可视化。照片和视频记录了不同的注射流速。视频和压力数据随后用于定性和定量流动行为表征,重点是由注入的聚合物溶液产生的弹性湍流。另外,将结果与牛顿流体的行为进行比较。

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