高温高盐油藏纳米SiO2稳定乳状液调驱体系构建与性能研究

doi:10.3969/j.issn.2097-2806.2026.02.004

摘要/Abstract

摘要：

针对高温高盐稠油油藏开发中乳状液调驱体系存在的热稳定性不足和流度控制能力弱等技术难题，该研究通过月桂酰胺丙基氧化胺（OA）对纳米SiO₂颗粒进行表面改性，构建了耐温耐盐纳米颗粒稳定乳状液调驱体系。研究结果表明：在0.05% OA改性条件下，所构建的乳状液体系表现出卓越的环境适应性，在90 ℃高温及2×10⁵ mg/L高矿化度环境中可保持30天以上的稳定状态；流变性能测试显示该体系具有显著的剪切变稀特性，黏度恢复率高达85.4%，动态流变分析证实纳米颗粒在水相中形成的三维网状结构是赋予体系弹性流体特性的关键因素。岩心驱替实验证实，该调驱体系对50×10^-3~3 500×10^-3 μm²渗透率范围的岩心均具有优异的封堵性能（阻力系数>80），特别在渗透率级差为4的非均质双管岩心实验中，采收率提升幅度达到30.2%，分流率改善效果超过40%，显著提高了油藏的波及系数和原油采收率。

关键词: 高温高盐油藏, 纳米SiO₂改性, 乳状液调驱, 流变特性, 提高采收率

Abstract:

To address the technical challenges of poor thermal stability and inadequate mobility control for using profile-control and flooding systems based on emulsions in high-temperature and high-salinity heavy oil reservoirs, in this work, a novel temperature-and salt-resistant nanoparticle-stabilized emulsion system was constructed for profile control and flooding, in which nano-SiO₂ particles were modified by using lauramidopropylamine oxide（OA）. The experimental results showed that, when the modification was carried out at an OA content of 0.05%, the constructed emulsion system exhibited good environmental adaptability, maintaining stability for over 30 days under harsh conditions of 90 ℃ and of salinity of 2×10⁵ mg/L. Rheological characterization showed that the system had obvious shear-thinning behavior with a viscosity recovery reaching 85.4%. Dynamic rheological analysis confirmed that the three-dimensional network structure formed by nanoparticles in aqueous phase was the key factor endowing the system with characteristics of elastic fluids. Core flooding experiments verified the excellent plugging performance of this system across a wide permeability range（50×10^-3-3 500×10^-3 μm², with resistance factor > 80）. Particularly in heterogeneous parallel-core experiments with permeability contrast of 4, the oil recovery was increased by 30.2%, the fractional flow rate was improved by over 40%, and both sweep efficiency and ultimate oil recovery were significantly enhanced.

Key words: high-temperature and high-salinity reservoir, modified nano-SiO₂, emulsion flooding, rheological property, enhanced oil recovery

中图分类号:

TQ423

史树彬. 高温高盐油藏纳米SiO₂稳定乳状液调驱体系构建与性能研究[J]. 日用化学工业（中英文）, 2026, 56(2): 169-175.

Shubin Shi. Construction and performance evaluation of a profile-control and flooding system based on nano-SiO₂ stabilized emulsion for high-temperature and high-salinity heavy oil reservoirs[J]. China Surfactant Detergent & Cosmetics, 2026, 56(2): 169-175.

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高温高盐油藏纳米SiO₂稳定乳状液调驱体系构建与性能研究

Construction and performance evaluation of a profile-control and flooding system based on nano-SiO₂ stabilized emulsion for high-temperature and high-salinity heavy oil reservoirs

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