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日用化学工业（中英文）

日用化学工业（中英文） ›› 2026, Vol. 56 ›› Issue (1): 41-47.doi: 10.3969/j.issn.2097-2806.2026.01.005

• 基础研究 • 上一篇    下一篇

纳米SiO2颗粒改善凝胶体系调堵性能室内研究

敖文君1,2,*(),李丰辉3,阚亮1,2,陈斌1,2,王锦林1,2,方月月1,2,孔丽萍1,2   

  1. 1.中海油海洋石油高效开发国家重点实验室， 北京 100028
    2.中海油能源发展股份有限公司工程技术分公司， 天津 300452
    3.中海石油(中国)有限公司天津分公司， 天津 300459
  • 收稿日期:2025-02-06 修回日期:2025-12-31 出版日期:2026-01-22 发布日期:2026-02-05
  • 基金资助:
    中国海油集团有限公司重大科技专项专题(KJGG2021-0501);中海油能源发展股份有限公司重大科技专项(HFKJ-ZD-GJ-2024-02-01)

Laboratory study on the profile-control and plugging performance of a gel system reinforced by nano-SiO2 particles

Wenjun Ao1,2,*(),Fenghui Li3,Liang Kan1,2,Bin Chen1,2,Jinlin Wang1,2,Yueyue Fang1,2,Liping Kong1,2   

  1. 1. Key EOR Laboratory of CNOOC, Beijing 100028, China
    2. CNOOC Enertech-Drilling & Production Co, Tianjin 300452, China
    3. Tianjin Branch of CNOOC （China） Co., Ltd., Tianjin 300459, China
  • Received:2025-02-06 Revised:2025-12-31 Online:2026-01-22 Published:2026-02-05
  • Contact: E-mail: wenjunao@126.com.

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摘要：

为有效提高凝胶体系对高渗窜流通道的封堵效果及在地层中的长期稳定性，以部分水解的聚丙烯酰胺为主剂、酚醛树脂为交联剂，以改性纳米SiO2为增强剂与稳定剂，制备了具有抗剪切、高黏弹性、高强度的纳米SiO2增强复合凝胶体系。采用流变仪、多维度物理模拟等实验装置对复合凝胶体系的溶液性能、封堵性能以及注采特征进行了研究。较常规凝胶体系相比，所形成的纳米SiO2增强复合凝胶其成胶强度提高了20%~50%、弹性模量提高了50%~150%、黏性模量提高了40%~80%以及抗剪切性能提高了15%~20%。通过物理模拟实验，纳米SiO2增强复合凝胶可以有效的实现高渗层封堵，动用低渗层，高渗层的分流率从98.3%下降到2.5%，低渗层分流率从1.7%提高到97.5%，剖面改善率达到了96.8%。在4倍级差的三层非均质条件下，采收率提高了6.9%，有效的提高了中低渗层的动用程度。纳米SiO2增强复合凝胶体系在改善高渗大孔道油藏方向有较好的指导意义。

关键词: 高渗通道, 纳米二氧化硅, 凝胶, 封堵性能, 剖面改善

Abstract:

To effectively enhance the plugging effect of gel systems in high-permeability channels and their long-term stability in formations, a nano-SiO2-reinforced composite gel system was prepared using partially hydrolyzed polyacrylamide as the main agent, phenolic resin as the crosslinker, and modified nano-SiO2 as the stabilizer and reinforcing agent. This system exhibited shear resistance, high viscoelasticity, and high strength. The performance of the composite gel system, including its solution properties, plugging efficiency, and injection-production characteristics, was studied by using a rheometer and the experimental equipment for multi-dimensional physical simulation. Compared with conventional gel systems, the nano-SiO2-reinforced composite gel showed improvements in gel strength by 20%-50%, elastic modulus by 50%-150%, viscous modulus by 40%-80%, and shear resistance by 15%-20%. Physical simulation experiments demonstrated that the nano-SiO2-reinforced composite gel effectively could plug high-permeability layers and mobilize low-permeability layers, reducing the fractional flow rate in high-permeability layers from 98.3% to 2.5% and increasing the fractional flow rate in low-permeability layers from 1.7% to 97.5%, achieving a profile improvement rate of 96.8%. Under the conditions of a four-fold permeability contrast in a three-layer heterogeneous core, the oil recovery was increased by 6.9%, indicative of the effectively enhanced mobilization of medium-and low-permeability layers. The nano-SiO2-reinforced composite gel system could provide significant guidance for improving oil recovery in reservoirs with high-permeability channels.

Key words: high-permeability channel, nano-SiO2, gel, plugging performance, profile improvement

中图分类号: 

  • TE34