关于钻井液净化及岩屑回收利用的试验研究

Experimental research on drilling fluid purification and cuttings recycling

摘要:

钻井液是钻探工程的核心介质，其净化效率直接影响钻进效率、钻井质量与生态环境。针对岩屑净化难题，俄罗斯科研团队提出了超声波与永久磁场协同净化钻井液及岩屑回收利用技术。通过理论分析建立了磁化条件下颗粒沉降动力学模型，设计了集成超声波辐射器与П字型磁铁的闭环处理装置，并开展了实验室与现场试验。结果表明：该技术能促使钻井液中岩屑颗粒形成稳定的“集群结构”，显著提升其沉降速度，有效改善钻井液的流变性能，滤失量降低50%，黏度提高20%，岩屑沉淀率达30%；岩屑经焙烧可制成压裂支撑剂，实现资源化利用。研究成果为解决钻井液净化与岩屑污染问题提供了创新技术路径，对推动钻探工程绿色化具有重要参考价值。

Abstract:

Drilling fluid is the core medium in drilling engineering and its purification efficiency directly affects drilling efficiency， drilling quality， and the ecological environment. To address the challenge of the cuttings purification， the Russian research team has proposed a technology of drilling fluid purification and cuttings recycling using ultrasonic waves and permanent magnetic fields. Through theoretical analysis， a kinetic model for particle sedimentation under magnetization conditions has been established. A closed-loop treatment apparatus， integrating an ultrasonic radiator and a П-shaped magnet， has been designed and subsequently subjected to both laboratory and field tests. The results of the tests demonstrate that this technology can promote the formation of stable "cluster structures" of cuttings particles in the drilling fluid， significantly enhancing their sedimentation rate and effectively improving the fluid''s rheological properties， leading to 50% reduction in fluid loss， 20% increase in viscosity， and cuttings precipitation rate reaching 30%. Furthermore， the recovered cuttings can be calcined to produce fracturing proppants， achieving resource utilization. These results provide a new innovative solution way for resolving the problems of drilling fluid purification and cuttings pollution and have significant reference value for promoting greening of drilling engineering.