Dynamic properties of microspheres at the nanoscale and mechanisms for their application in enhanced oil recovery

IF 2.6 4区 化学 Q3 POLYMER SCIENCE Journal of Polymer Research Pub Date : 2024-11-10 DOI:10.1007/s10965-024-04187-x
Wenwen Yang, Xiaojuan Lai, Lei Wang, Huaqiang Shi, Haibin Li, Jiali Chen, Xin Wen, Yulong Li, Xiaojiang Song, Wenfei Wang
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Abstract

A carbamate surfactant was synthesized using octadecanol polyoxyethylene ether(AEO) and isocyanatoethyl methacrylate(IEM) as functional monomers. Subsequently, active-carbamate-surfactant-modified PER nanomicrospheres were prepared through two-phase aqueous dispersion polymerization, utilizing acrylamide (AM), 2-acrylamido-2-methylpropanesulfonic acid (AMPS), and ethylene glycol dimethacrylate (EGDMA) as raw materials. The microstructures and properties of the nanomicrospheres were characterized and examined using infrared spectroscopy, nanolaser particle size analysis, thermogravimetric analysis, scanning electron microscopy, rheometry, rotating drop ultra-low interfacial tensiometry, and core-driven experiments. The results revealed that the synthesized PER nanomicrospheres exhibit a uniform particle size distribution, with an average particle size of 336 nm. Furthermore, the nanomicrospheres exhibit a thermal decomposition temperature of 278℃, demonstrating good thermal stability. The nanomicrospheres also exhibit favorable expansion and viscoelastic properties. Upon the injection of 3wt.% of the PER nanomicrospheres into a non-homogeneous core, the blocking rate (η) reaches 90.32%, while the recovery rate increases by 30.2%. This improvement is attributed to the unique structural design of the nanomicrospheres, allowing them to form a thin film at the three-phase oil–water-rock interface and promoting oil emulsification and stripping. Overall, the PER nanomicrospheres effectively control fluid dynamics within reservoirs, mitigate the loss of oil and gas resources, enhance the economic benefits of oil and gas fields, and thus demonstrate good application prospects.

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纳米级微球的动态特性及其在强化采油中的应用机制
以十八醇聚氧乙烯醚(AEO)和甲基丙烯酸异氰酸酯(IEM)为功能单体,合成了氨基甲酸酯表面活性剂。随后,以丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)和乙二醇二甲基丙烯酸酯(EGDMA)为原料,通过两相水分散聚合法制备了活性-氨基甲酸酯-表面活性剂改性的 PER 纳米微球。利用红外光谱、纳米激光粒度分析、热重分析、扫描电子显微镜、流变仪、旋转液滴超低界面张力仪和磁芯驱动实验对纳米微球的微观结构和性能进行了表征和检测。结果表明,合成的 PER 纳米微球粒径分布均匀,平均粒径为 336 nm。此外,纳米微球的热分解温度为 278℃,具有良好的热稳定性。纳米微球还具有良好的膨胀性和粘弹性。将 3wt.% 的 PER 纳米微球注入非均质内核后,阻塞率 (η) 达到 90.32%,而回收率提高了 30.2%。这种改善归功于纳米微球独特的结构设计,使其能够在油-水-岩三相界面形成薄膜,促进油的乳化和剥离。总之,PER 纳米微球能有效控制储层内的流体动力学,减少油气资源的损失,提高油气田的经济效益,具有良好的应用前景。
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来源期刊
Journal of Polymer Research
Journal of Polymer Research 化学-高分子科学
CiteScore
4.70
自引率
7.10%
发文量
472
审稿时长
3.6 months
期刊介绍: Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology, including: polymer synthesis; polymer reactions; polymerization kinetics; polymer physics; morphology; structure-property relationships; polymer analysis and characterization; physical and mechanical properties; electrical and optical properties; polymer processing and rheology; application of polymers; supramolecular science of polymers; polymer composites.
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