地震资料读写相干噪声的消除

Elimination of coherent noises in the read and write of seismic data

中国科学院地质与地球物理研究所,北京100101

The Research Institute of Geology and Geophysics, Chinese Academy Science, Beijing 100101

地震资料的读写噪声是原始记录带经过磁带机的重新读写以及存放造成的,形成机制与其它噪声完全不同,特点也不同,具有尖脉冲、宽频带的特点,常规的滤波和去除野值等去噪方法无法彻底消除该类噪声。利用该类噪声在频率域的宽频带和在时间域具有相干性的特性进行识别,然后利用该类噪声时间延续短(尖脉冲)的特点,用插值方法恢复原始数据。

The reading and writing noise comes from the re-reading and re-writing of seismic data stored in old tapes. It is completely different from other noises and characterized by narrow pulse and wide frequency bandwidth. Conventional noise elimination such as filtering and removal of wild values can not fully remove this kind of noises. This paper proposes to identify the noise by taking advantage of its wild bandwidth in frequency domain and coherency in time domain and restore the original data by interpolation. The feasibility of the method is validated with real data.