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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。
Drilling mud pulse measurement system is the necessary equipment for the development of directional wells for coalbed methane. The ground signal reception and processing technology is one of the key technologies of mud pulsers. Because the received signal contains a lot of mud pump noise and reflection noise, The extraction brought considerable difficulty. According to the sinusoidal characteristics of the pulse signal, a method based on time-domain directional differential filtering and frequency-domain band-pass filtering is proposed, and theoretical analysis and experiments are carried out to prove that this method is feasible.