油气井出砂监测系统超声信号采集及调理

针对现有的油气井出砂监测系统数据采集的噪声过多、效率较低等问题,设计了油气井出砂监测系统超声信号调理集采集方法。首先,砂粒撞击管壁的超声信号通过传感器采集;然后,采集后的信号经过驱动放大后先通过一个带通滤波器,确保进入ADC的信号频率为砂粒撞击主要存在的频率段;最后,信号进入ADC后再进行数字滤波,进一步滤除处于砂粒撞击频段的噪声。实验结果表明,经过二级滤噪后,系统采集信号的信噪比提高,且系统的工作效率显著提高。

Acquisition and Conditioning of Ultrasonic Signals in Sand Production Monitoring Systems for Oil and Gas Wells

Aiming at the problems of too much noise and low efficiency of existing sand production monitoring systems for oil and gas wells,a ultrasonic signal conditioning and acquisition method for the sand production monitoring systems in oil and gas wells is proposed.Firstly,the ultrasonic signals from the sand particles hitting the pipe walls are collected by sensors.Then,the collected signals are amplified and band-pass filtered to ensure the frequencies of the signals entering the ADC within the frequency band where the sand particles hit the pipes.Finally,the signals entered into the ADC need to be digitally filtered again to further filter out noise.The experimental results show that the secondary noise filtering makes the signal-to-noise ratio of the collected signals and the working efficiency of system improved significantly.