纳米颗粒稳定的泡沫的界面流变性及其在多孔介质中的保留,Energy & Fuels

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纳米颗粒稳定的泡沫的界面流变性及其在多孔介质中的保留
Energy & Fuels ( IF 5.2 ) Pub Date : 2021-03-24 , DOI: 10.1021/acs.energyfuels.0c03680
Qian Sun ₁ , Wei Liu ₁ , Songyan Li ₂ , Na Zhang ₁ , Zhaomin Li ₂

Affiliation

纳米稳定泡沫由于其在油田中的广泛应用而引起人们的关注。了解纳米颗粒的动态表面特性及其在储层形成中的保留对于其应用至关重要。这项研究提出了混合SiO ₂的影响纳米颗粒和十二烷基硫酸钠（SDS）对泡沫和界面性能的影响。此外，通过使用岩心驱替装置讨论了纳米颗粒在具有不同渗透率的沙包中的保留行为。实验结果表明，纳米颗粒和SDS在泡沫稳定性方面表现出协同作用，尽管在纳米颗粒存在下泡沫体积减小。可以推断，SDS可以确定混合系统的平衡表面压力，因为纳米颗粒会稍微影响表面压力。在吸附过程中，SDS和纳米颗粒之间存在竞争行为，并且纳米颗粒的存在会降低混合系统的吸附速率。该膜对SiO ₂表现出更大的弹性/ SDS分散体，因为在存在纳米粒子的情况下，分散体的膨胀弹性增强，而膨胀粘度变化很小。在保留实验中，纳米粒子由于其纳米尺寸而几乎可以平滑地流过沙包，而沙包渗透率几乎没有变化。随着沙袋渗透率的增加，纳米颗粒的保留率降低，并且可以通过比较沙袋注入前后的泡沫性质，将回收的纳米颗粒重新注入地层中。我们希望这项研究可以指导纳米稳定泡沫在油田中的进一步应用。

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Interfacial Rheology of Foam Stabilized by Nanoparticles and Their Retention in Porous Media

Nanoparticle-stabilized foam has aroused people’s attention due to its wide applications in oil fields. Understanding the dynamic surface properties of nanoparticles and their retention in reservoir formation is crucial for their application. This research presents the impact of mixing SiO₂ nanoparticles and sodium dodecyl sulfate (SDS) on foaming and interfacial properties. Also, the retention behaviors of nanoparticles in sandpacks with different permeabilities are discussed by employing the core-flooding apparatus. The experimental results show that nanoparticles and SDS exhibit synergy on foam stability, although the foam volume decreases in the presence of nanoparticles. It is inferred that SDS may determine the equilibrium surface pressure of the mixed system, as the nanoparticles can affect the surface pressure slightly. There exists a competitive behavior between SDS and nanoparticles during adsorption, and the presence of nanoparticles lowers the adsorption rate of the mixing system. The film behaves more elastic for SiO₂/SDS dispersion as the dilatational elasticity of the dispersion is enhanced in the presence of nanoparticles, while the dilatational viscosity changes little. In the retention experiments, nanoparticles can flow through the sandpack smoothly due to their nanometer sizes with few changes on the sandpack permeability. The nanoparticle retention decreases with increasing the sandpack permeability, and it is possible to reinject the recovered nanoparticles into the formation by comparing the foam properties before and after sandpack injection. We hope this research may guide the further application of nanoparticle-stabilized foam in oil fields.

更新日期：2021-04-15

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