化学暂堵体系的构建、性能及应用研究进展

Progress of Fabrications,Properties and Applications of Chemical Temporary Plugging Systems

暂堵作业是油气开发过程中防治漏失的重要手段。相较于暂堵球、封隔器及连续油管等物理暂堵模式,化学暂堵具有操作简易、成本可控、可直接作用于储层的优势,作为暂堵作业的主要手段得到广泛研究。基于其外观形态,化学暂堵剂可分为颗粒型、纤维型、凝胶型、表面活性剂类暂堵剂及复配暂堵体系。本文分类论述了各种暂堵剂的研究进展、作用机理、技术特点及应用,并针对常规暂堵体系的应用局限提出暂堵剂领域亟需解决的问题及发展方向。

Temporary plugging operation plays a crucial role in preventing leakoff during oil/gas exploitation. In comparison with mechanical shielding procedures such as temporary blocking ball,packer and coiled tubing,chemical temporary plugging have been more thoroughly explored and more commonly applied due to their the intrinsic merits such as easy operation,low cost and direct function in the reservoir crack. Chemical tempoary plugging agents are usually categorized into particulate,fiber-pattern,gel-pattern,surfactant and even multi-complex temporary plugging systems,based on their distinct shapes,patterns and composition. This paper reviewed the progress,mechanisms,characteristics and applications of conventional chemical temporary plugging agents. Simultaneously,the demerits needed to be solved urgently and future prospects of plugging systems were also analyzed.