为解决现有单相介质管道泄漏检测机理未考虑流型因素而难以适用于多相流管道的问题,开展了理论研究与试验分析。分析了不同流型对管道泄漏声波信号的影响机理,并结合多相流声波泄漏检测试验,采集了不同流型工况条件下管道泄漏前后的声...为解决现有单相介质管道泄漏检测机理未考虑流型因素而难以适用于多相流管道的问题,开展了理论研究与试验分析。分析了不同流型对管道泄漏声波信号的影响机理,并结合多相流声波泄漏检测试验,采集了不同流型工况条件下管道泄漏前后的声波信号,利用功率谱密度(Power Spectral Density,PSD)分析、概率密度函数(Probability Density Function,PDF)分析、幅频谱分析等信号处理方法分析其特征。结果表明:流型对多相流管道泄漏特征影响极大,不同的流型工况下管道流动背景噪声特征及泄漏声源特性不同。该研究为多相流管道声波泄漏检测的基础研究,可为后续开展不同流型工况下管道泄漏声波产生及传播机理研究提供理论支持。(图8,表1,参23)展开更多
Most multiphase flow separation detection methods used commonly in oilfields are low in efficiency and accuracy,and have data delay.An online multiphase flow detection method is proposed based on magnetic resonance te...Most multiphase flow separation detection methods used commonly in oilfields are low in efficiency and accuracy,and have data delay.An online multiphase flow detection method is proposed based on magnetic resonance technology,and its supporting device has been made and tested in lab and field.The detection technology works in two parts:measure phase holdup in static state and measure flow rate in flowing state.Oil-water ratio is first measured and then gas holdup.The device is composed of a segmented magnet structure and a dual antenna structure for measuring flowing fluid.A highly compact magnetic resonance spectrometer system and intelligent software are developed.Lab experiments and field application show that the online detection system has the following merits:it can measure flow rate and phase holdup only based on magnetic resonance technology;it can detect in-place transient fluid production at high frequency and thus monitor transient fluid production in real time;it can detect oil,gas and water in a full range at high precision,the detection isn’t affected by salinity and emulsification.It is a green,safe and energy-saving system.展开更多
文摘为解决现有单相介质管道泄漏检测机理未考虑流型因素而难以适用于多相流管道的问题,开展了理论研究与试验分析。分析了不同流型对管道泄漏声波信号的影响机理,并结合多相流声波泄漏检测试验,采集了不同流型工况条件下管道泄漏前后的声波信号,利用功率谱密度(Power Spectral Density,PSD)分析、概率密度函数(Probability Density Function,PDF)分析、幅频谱分析等信号处理方法分析其特征。结果表明:流型对多相流管道泄漏特征影响极大,不同的流型工况下管道流动背景噪声特征及泄漏声源特性不同。该研究为多相流管道声波泄漏检测的基础研究,可为后续开展不同流型工况下管道泄漏声波产生及传播机理研究提供理论支持。(图8,表1,参23)
基金Supported by the National Natural Science Foundation of China(51704327)
文摘Most multiphase flow separation detection methods used commonly in oilfields are low in efficiency and accuracy,and have data delay.An online multiphase flow detection method is proposed based on magnetic resonance technology,and its supporting device has been made and tested in lab and field.The detection technology works in two parts:measure phase holdup in static state and measure flow rate in flowing state.Oil-water ratio is first measured and then gas holdup.The device is composed of a segmented magnet structure and a dual antenna structure for measuring flowing fluid.A highly compact magnetic resonance spectrometer system and intelligent software are developed.Lab experiments and field application show that the online detection system has the following merits:it can measure flow rate and phase holdup only based on magnetic resonance technology;it can detect in-place transient fluid production at high frequency and thus monitor transient fluid production in real time;it can detect oil,gas and water in a full range at high precision,the detection isn’t affected by salinity and emulsification.It is a green,safe and energy-saving system.
