随钻泥浆脉冲器信号处理技术研究

Research on Signal Processing of Mud Wave Mud Pulser

随钻泥浆脉冲测量系统是目前煤层气定向井开发的必需设备,而地面信号接收处理技术是泥浆脉冲器的关键技术之一,由于接收信号中含有大量的泥浆泵噪声和反射噪声,给有用信号的提取带来了相当大的困难。根据脉冲信号的正弦特性,提出了基于时域定向差分滤波与频域带通滤波相结合的方法,并进行了理论分析和实验,证明这种方法是可行的。

The system of mud pulse measurement is necessary for directional coalbed methane drilling well.The signal processing is one of key technologies to system of mud pulse measurement,however,it is difficult to acquire useful signals,since including most of reflective and mud pump noises.Based on signal characteristic of sine,a new difference filter method,which is in time field,is put forward.The method combines with band-pass filter,which is in frequency field,to reject noises.By analyses in theory and experiment,the result is that it is true.