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Poly(2-acrylamide-2-methylpropanesulfonic acid)-Modified SiO2 Nanoparticles for Water-Based Muds
- Wu, Yuanpeng, Wang, Zhihao, Yan, Zhu, Zhang, Tao, Bai, Yang, Wang, Pingquan, Luo, Pingya, Gou, Shaohua, Guo, Qipeng
- Industrial & Engineering Chemistry Research 2017 v.56 no.1 pp. 168-174
- additives, ambient temperature, copolymerization, drilling, engineering, filter cake, filtration, nanoparticles, nanopores, salt tolerance, shale, silica, thermal stability
- We report the fabrication of poly(2-acrylamide-2-methylpropanesulfonic acid) modified SiO₂ (SiO₂/PAMPS) nanoparticles as plugging agents in water-based muds (WBMs). SiO₂/PAMPS nanoparticles were prepared by the copolymerization of 3-methacryloxypropyltrimethoxysilane-functionalized SiO₂ nanoparticles and 2-acrylamide-2-methylpropanesulfonic acid. These SiO₂/PAMPS nanoparticles were found to exhibit excellent salt tolerance, thermal stability, and good compatibilities with polymeric additives commonly used in WBMs. The plugging capabilities of the nanoparticles were tested with filter cakes on a high-temperature, high-pressure filtration press. The results indicated that SiO₂/PAMPS nanoparticles can effectively block the nanopores in filter cake. In addition, WBMs containing SiO₂/PAMPS nanoparticles were found to exhibit excellent plugging properties both at ambient temperature and at 80 °C, demonstrating that these nanoparticles are promising plugging agents in WBMs for drilling in shale formations.