Research progress on polymer microspheres for in-depth profile control in hydrocarbon reservoirs: Structural design and degradation measures

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Liquids Pub Date : 2025-04-08 DOI:10.1016/j.molliq.2025.127550

Nianyin Li , Jiayu Wang , Yajun Wei , Haiyan Zhang , Jiajie Yu , Chen Jiang , Hong Zhang , Yuan Wang , Yue Li

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Abstract

With prolonged development of oil fields, injected water induces channeling along high-permeability zones, leading to a decrease in crude oil recovery rate. Polymer microspheres are extensively employed for in-depth profile control in hydrocarbon reservoirs owing to their outstanding viscoelasticity and plugging capabilities. However, reservoirs may suffer poor fluid injectivity from irreversible polymer plugging, and polymer microspheres are structurally unstable in deep reservoirs. This article systematically summarizes four structural design methods aimed at enhancing the reservoir adaptability of microspheres, including: adding functional monomers, altering the concentration and type of crosslinking agents, adding inorganic fillers, and constructing core–shell microspheres. The improvement effects of each method are discussed. Besides, physical and chemical approaches to degrading large particle size microspheres and their pros and cons were also reviewed in detail. Finally, we discussed the prospects and challenges associated with structural design and degradation methods for polymer microspheres.

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聚合物微球在油气藏深度剖面控制方面的研究进展：结构设计和降解措施

随着油田开发时间的延长，注水井沿高渗透层产生窜流，导致原油采收率降低。聚合物微球由于其出色的粘弹性和封堵能力，被广泛应用于油藏的深度调剖。然而，不可逆聚合物堵塞可能导致储层流体注入能力差，并且聚合物微球在深部储层中结构不稳定。本文系统总结了增强微球储层适应性的四种结构设计方法，包括：添加功能单体、改变交联剂的浓度和类型、添加无机填料和构建核壳微球。讨论了各种方法的改进效果。此外，还详细介绍了大粒径微球的物理和化学降解方法及其优缺点。最后，我们讨论了聚合物微球结构设计和降解方法的前景和挑战。

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.