摘要
超声波能够对油气井滤饼进行清除,提升固井质量,但在井下条件下超声波空化所能产生的清洗距离少有人研究。为此,基于超声波发射换能器、水听器以及套管设计了超声波空化清洗距离检测试验平台。基于试验平台,研究了不同频率、温度及压力下,井下超声空化清洗所能达到的有效清洗距离,探索高温高压井中超声波空化效应去除滤饼的可行性。基于正交试验方法制定试验方案,并对超声空化清洗影响因素开展分析。试验结果表明,对超声空化清洗影响程度的因素由大到小为压力、超声频率、温度。基于Box-Behken模型拟合得出,在发射功率为400 W时,超声波空化清洗最优参数为超声波频率20 kHz、液体温度30℃、液体压力为标准大气压,此时超声波空化清洗距离最远为1193.94 mm,与仿真误差约为14.75%。基于频谱分析方法,使用水听器对空化噪声进行采集,开展功率单因素变量试验,发现在超声波输出功率达到1200 W时,空化强度趋于饱和。研究结果可为超声波在井筒清洗中的应用提供理论参考。
Ultrasonic waves can remove filter cake from oil and gas wells,thereby enhancing the quality of well cementing.However,the distance over which ultrasonic cavitation can effectively clean under downhole conditions has been rarely studied.This paper describes a test platform designed for measuring the cleaning distance of ultrasonic cavitation,which incorporates an ultrasonic transducer,hydrophone and casing setup.Using this platform,the effective cleaning distance of downhole ultrasonic cavitation was examined at different frequencies,temperatures and pressures,to investigate the feasibility of ultrasonic cavitation to remove filter cake in high-temperature,high-pressure wells.An orthogonal experiment was designed to identify factors influencing the ultrasonic cavitation cleaning.The results reveal that the influencing factors are pressure,ultrasonic frequency,and temperature,in a descending order of impact.By fitting a Box-Behnken model,the optimal parameters were determined to be an ultrasonic frequency of 20 kHz,a liquid temperature of 30℃,and a liquid pressure at standard atmospheric conditions,when the transmission power is at 400 W,yielding a maximum cleaning distance of 1193.94 mm with an approximate simulation error of 14.75%.Through spectral analysis and the use of a hydrophone to gather cavitation noise,single-factor experiment was conducted under different power outputs.It is found that the cavitation intensity tends to reach saturation when the ultrasonic power output reaches 1200 W.The research results provide a theoretical reference for application of ultrasonic wave in wellbore cleaning.
作者
曲从锋
尹宜勇
刘斌辉
王岩
郭新超
白翰钦
Qu Congfeng;Yin Yiyong;Liu Binhui;Wang Yan;Guo Xinchao;Bai Hanqin(CNPC Engineering Technology R&D Co.,Ltd.;College of Engineering,China Agricultural University;Beijing KEMBL Petroleum Technology Development Co.,Ltd.)
出处
《石油机械》
北大核心
2025年第3期10-17,共8页
China Petroleum Machinery
基金
国家自然科学基金面上项目“页岩气水平井振动固井流固耦合振动机理及智能寻优方法研究”(52175126)
中国石油科技创新基金研究项目“高温高压振动固井机理及智能控制方法研究”(2022DQ02-0302)
中国石油科技创新基金研究项目“长半径水平井振动固井流固耦合振动机理研究及智能寻优装置设计”(2019D-5007-0306)。
关键词
超声波
空化
清洗距离
有限元
滤蚀清除
正交试验
ultrasonic
cavitation
cleaning distance
finite element
filter cake removal
orthogonal experiment
作者简介
第一作者:曲从锋,高级工程师,生于1979年,2005年毕业于中国石油大学(北京)油气井工程专业,现从事油气井固井、完井技术方面的研究工作。地址:(102206)北京市昌平区。电话:(010)80162292。email:qucongfengdri@cnpc.com.cn。
