地震检波器接收电磁干扰实验分析

Experimental analysis about electromagnetic interference of seismic receiver

电磁干扰至今仍然困扰着地震勘探生产,本文通过一种室内实验方法,验证了地震数据通道的平衡状态被破坏是产生电磁干扰的根本原因,并且电磁干扰的大小与检波器串的阻值大小相关。指出在电磁干扰比较严重的地震勘探作业区,采用适当的检波器并联方式、保证数据通道畅通、避免漏电等良好的对称平衡状态,是降低或者消除电磁干扰影响的有效方法。

Electromagnetic interference has still been a trouble to the production of seismic exploration up-to-now. This paper proved that the change of balance of seismic data channel is basic reason producing the electromagnetic interference by an indoor experimental approach, After change of balance of data channel, the size of electromagnetic interference correlates with the size of impedance of geophone string, The paper also pointed out that in the area where the electromagnetic interference is more serious for seismic exploration, it should use adequate parallel way of geophone in order to guarantee the unblocked data channel and avoid electric leakage, which is good symmetric balance status that is effective method for reducing or removing the influence of electromagnetic interference.