基于正余弦加权逼近法的50Hz工业干扰压制方法

Method to suppress 50Hz industrial noise based on sine and cosine weighted approximation

成熟勘探工区的工业化程度高,高压线密集,地震记录中常常存在较强的50Hz工业干扰,其能量极强,频带范围与地震资料优势频带范围重叠,严重影响地震资料的品质。50Hz工业干扰压制方法基于正余弦加权逼近法,实现工业干扰的自动识别与压制,即仅对存在工业干扰的数据进行噪音压制,这样既能有效压制噪音,又不损伤有效信号,50Hz工业干扰得到较好压制,能够有效提高地震资料的品质,具有较高的应用价值。

The strong 50 Hz industrial noise usually exist in seismic record on the mature exploration areas because of the high degree of industrialization and high intensive voltage line. The mixing of the frequency band of powerful industrial noise with the domain frequency band of seismic data decreased greatly the quality of seismic data greatly. This method based on sine and cosine weighted approximation could automatically recognize and suppress the 50 Hz industrial noise. In other words, only the polluted traces on the records are suppressed, not only the noises are suppressed well but also the desired signals are not damaged as well, the quality of seismic data is improved by the suppressing 50 Hz industrial noise and the method has a good application prospects in seismic data processing.