Scholarlink

<p>In this study, a double network hydrogel crosslinked via dynamic covalent bonds was developed. At room temperature, the material existed as a low-viscosity solution with excellent fluidity; as temperature increased to a specific threshold (80&#xa0;°C), it underwent sol-gel transition and formed a stable gel with considerable mechanical integrity within two hours. This gelation time aligns well with the pumping process when compared to conventional time-based gel systems. The unique thermoresponsive was characterized using a suite of analytical techniques, including scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), and rheological measurements. At 80&#xa0;°C, the gel exhibited a viscosity of 28,600 mPa·s and breakthrough pressure gradient of 20&#xa0;MPa / m, which is sufficient for typical plugging applications and significantly reduces the required material quantity compared to conventional polyacrylamide-based plugging systems. Results demonstrated that the system enabled in-situ controllable gelation for plugging, followed by autonomous self-degradation for deplugging - with no additional chemical breakers required. After the plugging operation, further temperature elevation or prolonged placement drove the hydrogel to degrade back into a low - viscosity, flowback - compatible solution, thereby restoring fracture conductivity. The material exhibits promising application potential in oilfield processes, such as water shutoff in oil and gas wells, and temporary plugging for diverting fracturing.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Self-Degradable Temporary Plugging Agent Based on Dynamic Covalent Bond-Crosslinked Double-Network Hydrogels

  • 期刊论文

  • 发表日期：

    2026年7月11日

查看全文
  • Junting Huang,
  • Shuoshuo Wang,
  • Yuxi He,
  • Zhouxu Liu,
  • Yifen Zhang,
  • Guangyan Du,
  • Jian Li

摘要

In this study, a double network hydrogel crosslinked via dynamic covalent bonds was developed. At room temperature, the material existed as a low-viscosity solution with excellent fluidity; as temperature increased to a specific threshold (80 °C), it underwent sol-gel transition and formed a stable gel with considerable mechanical integrity within two hours. This gelation time aligns well with the pumping process when compared to conventional time-based gel systems. The unique thermoresponsive was characterized using a suite of analytical techniques, including scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), and rheological measurements. At 80 °C, the gel exhibited a viscosity of 28,600 mPa·s and breakthrough pressure gradient of 20 MPa / m, which is sufficient for typical plugging applications and significantly reduces the required material quantity compared to conventional polyacrylamide-based plugging systems. Results demonstrated that the system enabled in-situ controllable gelation for plugging, followed by autonomous self-degradation for deplugging - with no additional chemical breakers required. After the plugging operation, further temperature elevation or prolonged placement drove the hydrogel to degrade back into a low - viscosity, flowback - compatible solution, thereby restoring fracture conductivity. The material exhibits promising application potential in oilfield processes, such as water shutoff in oil and gas wells, and temporary plugging for diverting fracturing.