School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China.
Zhejiang Research Institute of Tianjin University, Shaoxing 312369, China.
Int J Biol Macromol. 2024 Apr;263(Pt 1):130193. doi: 10.1016/j.ijbiomac.2024.130193. Epub 2024 Feb 13.
Thermoviscosifying polymers refer to a category of smart materials that exhibit a responsive behavior to environmental stimuli, specifically demonstrating a natural rise in viscosity of solutions as the temperature increases. The temperature-dependent behavior exhibited by thermally viscous polymers renders them potentially advantageous in the context of Enhanced Oil Recovery (EOR). There exists a dearth of research pertaining to the application of thermoviscosifying polymer for better recovery in reservoirs characterized by high temperatures and high salt content. In order to tackle the mentioned concerns, this study examined the utilization of welan gum modified with poly(2-oxazoline) as thermally responsive chain segments to enhance viscosity. The objective was to evaluate the ability to enhance viscosity under thermal conditions and to assess their effectiveness in displacement of reservoir oil in high temperature and high salt environments. This study aimed to establish a theoretical framework for understanding the correlation between the molecular structure and performance of novel thermally viscous polymers. Additionally, it sought to offer practical insights into designing the molecular structure of thermally viscous polymers suitable for polymer flooding in high temperature and high salt environments. Furthermore, the study proposed the application of these new thermoviscosifying polymers for EOR.
热致粘弹性聚合物是一类智能材料，它们对环境刺激表现出响应行为，特别是在温度升高时，溶液的粘度会自然升高。热致粘弹性聚合物表现出的温度依赖性使它们在提高石油采收率（EOR）方面具有潜在的优势。然而，目前关于在高温高盐油藏中应用热致粘弹性聚合物以实现更好采收率的研究还很少。为了解决上述问题，本研究考察了用聚（2-恶唑啉）修饰的韦兰胶作为热响应链段来提高粘度的应用。目的是评估在热条件下提高粘度的能力，并评估它们在高温高盐环境下驱替油藏油的效果。本研究旨在建立一个理论框架，以理解新型热致粘弹性聚合物的分子结构与性能之间的关系。此外，本研究还旨在为设计适用于高温高盐环境下聚合物驱的热致粘弹性聚合物的分子结构提供实用见解。此外，本研究还提出了将这些新型热致粘弹性聚合物应用于 EOR 的建议。
