title: Research on ultrasonic excitation for the removal of drilling fluid plug, paraffin deposition plug, polymer plug and inorganic scale plug for near-well ultrasonic processing technology.
abstract: Near-well ultrasonic processing technology attracts more attention due to its simple operation, high adaptability, low cost and no pollution to the formation. Although this technology has been investigated in detail through laboratory experiments and field tests, systematic and intensive researches are absent for certain major aspects, such as whether ultrasonic excitation is better than chemical agent for any plugs removal; whether ultrasound-chemical combination plug removal technology has the best plugs removal effect. In this paper, the comparison of removing drilling fluid plug, paraffin deposition plug, polymer plug and inorganic scale plug using ultrasonic excitation, chemical agent and ultrasound-chemical combination plug removal technology is investigated. Results show that the initial core permeability and ultrasonic frequency play a significant role in plug removal. Ultrasonic excitation and chemical agent have different impact on different plugs. The comparison results show that the effect of removing any plugs using ultrasound-chemicals composite plug removal technology is obviously better than that using ultrasonic excitation or chemical agent alone. Such conclusion proves that ultrasonic excitation and chemical agent can cause synergetic effects.
authors.affiliation: School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China. Electronic address: 2063871049@qq.com.
authors.forename: Zhenjun
authors.initials: Z
authors.lastname: Wang
authors.affiliation: School of Economics & Management, Shanghai Maritime University, Shanghai 201306, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zeng
authors.affiliation: Commercial Aircraft Corporation of China, Ltd (COMAC), Civil Aircraft Fight Test Center, Shanghai 200232, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Song
authors.affiliation: Eastone Automotive Technology Co., Ltd., Shanghai 200123, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Li
keywords: Chemical agent; Near-well ultrasonic processing technology; Ultrasonic excitation; Ultrasound-chemical combination plug removal technology