A small portion of oil can be extracted during primary and secondary stages of oil production, and significant quantities of oil remain in reservoirs. Enhanced oil recovery methods are used to extract the trapped oil with high viscosity in reservoirs and improve the efficiency of the production wells. Ultrasonic-based enhanced oil recovery method has become of considerable interest to researchers in recent years. This paper mainly presents the in-depth literature review of ultrasonic wave to investigate its application development trend in enhanced oil recovery. Besides, it also presents an overview of conventional enhanced oil recovery techniques such as chemical, gas, and thermal methods and nonconventional techniques such as electromagnetic and microwave heating. The results exhibit an increasing implementation of the ultrasonic waves for oil recovery since it is an inexpensive and ecologically sound method, can be applied in any type of reservoir, protects the well against damage, prevents heat loss, and enables stimulation freely.

中文翻译：

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常规和电气EOR回顾：EOR中超声应用的发展趋势

在采油的第一阶段和第二阶段可以提取一小部分石油，并且储层中仍残留有大量的石油。增强的采油方法用于提取储层中具有高粘度的被捕集的油，并提高生产井的效率。近年来，基于超声波的强化采油方法已引起研究人员的极大兴趣。本文主要介绍超声波的深入文献综述，以探讨其在提高采油率方面的应用发展趋势。此外，它还概述了常规的强化采油技术，例如化学，天然气和热法，以及非常规的技术，例如电磁和微波加热。