石油化工高等学校学报 ›› 2026, Vol. 39 ›› Issue (4): 74-80.DOI: 10.12422/j.issn.1006-396X.2026.04.008

• 石油工程 • 上一篇    

暂堵转向压裂关键参数优化及裂缝扩展实验研究

国峰(), 王春生()   

  1. 东北石油大学 提高油气采收率教育部重点实验室,黑龙江 大庆 163000
  • 收稿日期:2025-09-26 修回日期:2025-12-03 出版日期:2026-08-25 发布日期:2026-07-20
  • 通讯作者: 王春生
  • 作者简介:国峰(2001-),男,硕士研究生,从事油气田开发方面的研究;E-mail:13341552491@163.com
  • 基金资助:
    国家自然科学基金项目(52074090);黑龙江省自然科学基金项目(LH2019E017);黑龙江省重点研发计划项目(JD22A004)

Experimental Study on Temporary Blockage-Induced Fracturing Key Parameter Optimization and Fracture Propagation

Feng GUO(), Chunsheng WANG()   

  1. Key Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education,Northeast Petroleum University,Daqing Heilongjiang 163000,China
  • Received:2025-09-26 Revised:2025-12-03 Published:2026-08-25 Online:2026-07-20
  • Contact: Chunsheng WANG

摘要:

为解决油藏开发中老缝窜流、储层动用不均及采收率提升受限的问题,通过物理模拟实验优化暂堵转向压裂参数,系统分析了裂缝扩展规律;探究了粒径为0.31~0.34 cm的颗粒暂堵剂与粒径为0.10~0.18 cm的粉末暂堵剂质量比、暂堵剂总质量及压裂液注入速率等对封堵效果的影响,并结合大型物理模拟实验分析了裂缝转向特征。结果表明,各参数存在协同最优关系:当颗粒暂堵剂与粉末暂堵剂质量比为5∶5、压裂液注入体积为2 000 mL、暂堵剂总质量为50 g、注入速率为100 mL/min时,封堵效果最优,封堵层稳定承压达9.54 MPa,成型时间仅为81 s;在大型物理模拟实验中,该参数组合下裂缝转向角最大达167.5°,可有效阻断老缝延伸,迫使压裂液向储层未动用区域拓展。本研究明确了最优参数体系与裂缝扩展机制,为现场老裂缝改造提供了可靠的实验依据与理论支撑。

关键词: 暂堵转向压裂, 大物理模型, 参数优化, 裂缝转向, 封堵效果

Abstract:

To address the problems of channeling through existing fractures, uneven reservoir stimulation,and limited recovery enhancement during reservoir development,the parameters of temporary plugging and directional fracturing were optimized through physical simulation experiments, and the fracture propagation laws were systematically analyzed.The effects of the mass ratio between granular temporary plugging agents (particle size: 0.31~0.34 cm) and powdery temporary plugging agents (particle size:0.10~0.18 cm), the total mass of temporary plugging agents,and the fracturing fluid injection rate on the plugging performance were investigated. Combined with large-scale physical simulation experiments, the fracture deflection characteristics were further analyzed. The results indicate a synergistic optimal relationship among the parameters.When the mass ratio of the two agents is 5∶5, the fracturing fluid injection volume is 2 000 mL, the total agent dosage is 50 g, and the injection rate is 100 mL/min,the sealing effect is optimal,with the sealed zone withstanding a stable pressure of 9.54 MPa and forming in just 81 s. In the large-scale physical model, the fracture deflection angle reached a maximum of 167.5° under this parameter combination, effectively blocking the propagation of existing fractures and forcing the fracturing fluid to expand into undeveloped areas of the reservoir. This study clarifies the optimal parameter system and fracture propagation mechanism,providing reliable experimental evidence and theoretical support for the in-situ remediation of existing fractures.

Key words: Temporary plugging and directional fracturing, Large-scale physical model, Parameter optimization, Fracture deflection, Plugging effectiveness

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引用本文

国峰, 王春生. 暂堵转向压裂关键参数优化及裂缝扩展实验研究[J]. 石油化工高等学校学报, 2026, 39(4): 74-80.

Feng GUO, Chunsheng WANG. Experimental Study on Temporary Blockage-Induced Fracturing Key Parameter Optimization and Fracture Propagation[J]. Journal of Petrochemical Universities, 2026, 39(4): 74-80.

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