Magnetically recoverable functionalized Fe3O4/Cu-MOF reduces divalent ions in oilfield wastewater and synergizes with crude oil binary drive for enhanced recovery

IF 4.4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science Pub Date : 2026-09-18 DOI:10.1007/s10853-026-13706-8

Lutao Yang, Chuanchen Zhou, Fang Zhang, Jie Yang, Lei He, Jun Zhang

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引用次数: 0

Abstract

Given the ongoing global demand for oil, polymer–surfactant binary flooding technology plays a key role in enhancing oil recovery. However, in high-temperature, high-salinity, and high-calcium/magnesium reservoirs, traditional binary flooding systems face limitations due to thermal degradation, salt sensitivity, and formation adsorption, significantly reducing their effectiveness. In this study, a novel magnetic nanocomposite, BS@Fe₃O₄/MOF, was synthesized using Cu-based metal–organic framework (Cu-MOF)-doped Fe₃O₄ magnetic nanoparticles and functionalized with dodecyldimethyl betaine (BS-12). The nanocomposite effectively removed Ca²⁺ and Mg²⁺ ions. Emulsification tests optimized the binary surfactant/polymer (SP) flooding system with octylphenol ethoxylate (OP-10) and xanthan gum (XG) and verified the feasibility of constructing the SP-BS@Fe₃O₄/MOF system. The system showed strong tolerance to high temperatures, salinity, and varied pH environments, with a substantial increase in viscosity and ultra-low interfacial tension in crude oil. Adsorption loss was 14%, with separation rates of 8.28% for the nanocomposite and 17.86% for XG. Oil recovery tests showed an 8.22% improvement, and magnetic recovery added another 3.75%. Overall, BS@Fe₃O₄/MOF enhances binary flooding, providing a strategic solution for field application challenges.

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磁可采功能化Fe3O4/Cu-MOF可降低油田废水中的二价离子，并与原油二元驱协同提高采收率

考虑到全球对石油的持续需求，聚合物-表面活性剂二元驱技术在提高石油采收率方面发挥着关键作用。然而，在高温、高矿化度和高钙镁油藏中，由于热降解、盐敏感性和地层吸附，传统的二元驱体系面临局限性，显著降低了其有效性。本研究以cu基金属有机骨架（Cu-MOF）掺杂Fe3O4磁性纳米粒子，并以十二烷基二甲基甜菜碱（BS-12）为功能化剂，合成了一种新型磁性纳米复合材料BS@Fe3O4/MOF。纳米复合材料能有效去除Ca2+和Mg2+离子。乳化试验优化了以辛基酚聚氧乙酸酯（OP-10）和黄原胶（XG）为原料的二元表面活性剂/聚合物（SP）驱替体系，验证了构建SP-BS@Fe3O4/MOF体系的可行性。该体系对高温、盐度和不同pH值环境具有很强的耐受性，在原油中粘度显著提高，界面张力超低。纳米复合材料的吸附损失为14%，分离率为8.28%，XG为17.86%。原油采收率提高8.22%，磁采收率提高3.75%。总体而言，BS@Fe3O4/MOF增强了二元驱，为现场应用挑战提供了战略解决方案。

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.