期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 58, 期 16, 页码 6747-6755出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.8b05525
关键词
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资金
- Fundamental Research Funds for the Central Universities of China [201822009]
- Program for Innovative Research Team in Ocean University of China [1RT1289]
- National Key Research and Development Program of China [2016YFC1402301]
The transformation of the liquid menisci at pore throats is of great importance for mitigating the liquid-blocking effect of condensate reservoirs. Here, we reported a super gas-wetting peanut-like nanoparticle which can facilitate the liquid menisci to transform from concave shape to convex shape by coating a super gas-wetting adsorption with high surface roughness. The morphology and surface chemistry of gas-wetting nanoparticles were investigated by SEM, AFM, and XPS analysis. The mechanism of surface modification was further explored by TEM; the adsorption layer coated on the nanoparticle surface can be recognized as monolayer absorption. The gas-wetting model is recommended as the combination of the Wenzel model and Cassie-Baxter model, which is in close agreement with the results of AFM and contact-angle measurements. Core flooding visualization was performed to identify the effect of gas-wetting alteration on the transformation of liquid menisci in porous media. Results showed that the addition of gas-wetting nanoparticles could decrease the liquid saturations by inducing the transformation of liquid menisci in the pore throat. Additionally, a unique amoeba effect and miscibility effect can synergistically improve the mobility of the oil phase, further enhancing the oil recovery.
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