稠油出砂信号去噪分析
2014年2月08日 09:43 作者:李兵祥1,樊超2,张维娜1,张微1
稠油出砂信号去噪分析中国论文网 g[zn s HSg
李兵祥1,樊超2,张维娜1,张微1中国论文网"d v5aqRCny'_
(1 西安石油大学,陕西 西安 710065;2 陕西青年职业学院,陕西 西安 710068)
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{(}0摘要:石油生产过程中,出砂不仅导致设备损伤、产量下降,而且还会影响到油气井的寿命,所以采取合理的
%Li7fY`E6]v'WoG0防砂、治砂措施是非常重要的。但是压电式超声波传感器检测的出砂信号,包含很强的流体噪声和电磁干扰信
[-} D5t/?:ts0号,必须去除干扰才能得到有用信号。本文采用小波变换在MATLAB下进行仿真,并与傅里叶变换比较去噪
hWL4IMh#O8A0效果,结果显示小波变换既能有效的去除噪声,又能保存信号中的有用信息。经过室内试验及现场试验得到的中国论文网#S [ sx}
数据显示,小波变换具有很好的去噪效果。中国论文网C"R/l|-?Bu
关键词:压电式超声波传感器;小波变换;去噪中国论文网
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中图分类号: TE8 文献标识码: B中国论文网 o'GkD5[y/c
De-noising analysis of heavy oil sanding signals
w8n@&a,Quu8b0based on wavelet transform中国论文网w4Y!r:_ [
Li Bingxiang1,Fan Chao2,Zhang Weina1,Zhang Wei1
6c6b-P.q\0(1 Xi’an Shiyou University,Shaanxi Xi’an 710065;2 Shaanxi Youth Vocational College, Shaanxi Xi’an 710068)中国论文网Dbhz];H6T
Abstract: In the process of oil production, sand production not only lead to the equipment damage and reduce the中国论文网#l
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production, but also can affect the life of the oil well, so take reasonable sand measurements and control is very important.中国论文网9F3B5g5R2~-HZ\&\(M%M
But the signals detected by the piezoelectric ultrasonic sensor contain strong fluid noise and electromagnetic interference,
x3v7O#bQ~0in order to get the useful signals, the interferences must be removed. This paper uses wavelet transform, and simulate in the
)GoB(It2g0MATLAB, and compares the de-noising effects with the Fourier transform, the results show that the wavelet transform
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~0can effectively remove noises, and it also preserves the useful information of the signals. Through the data from laboratory
jIq~V-X [0test and field test show that the wavelet transform have very good de-noising effect.