自适应相干噪声衰减技术

Self-adaptive coherent noise attenuation technique

高少武 ,赵波 ,周兴元 .自适应相干噪声衰减技术 .石油地球物理勘探 ,2 0 0 3,38(3) :2 4 2～ 2 4 6 去除噪声是必需的地震数据处理过程。由于地表条件和地震波激发、传播以及接收条件等诸多方面的原因 ,时常引起地震记录上出现各种相干干扰波。本文主要针对地震数据处理中地震剖面上存在的各种相干噪声 ,提出了时间—空间域自适应相干噪声衰减技术 ,以进行信噪分离。这种方法把噪声在整个处理平面上的视速度近似看作常量 (正值或负值 ) ,可以有效地消除地震剖面上的线性噪声、面波以及多次波等 ,并且对信号的保真度高。本文方法是复杂地区低信噪比地震数据处理的一种理想的噪声去除方法 ,具有运算速度快、压制噪声效果好等优点。

Noise elimination is a necessary,there are all kinds of coherent noise on seismic records because of many reasons caused by shooting,propagation and receiving of seismic wave.Aimed at the coherent noise in seismic data processing,the paper presented self adaptive coherent noise attenuation technique in time space domain,separating signal/noise.The method looks to the apparent velocity,that noise is on whole processing plane,approximately as constant (positive or negative value ),which can effectively eliminate the linear noise,surface wave and multiple etc.,and has HI FI signal,that is ideal noise elimination method for seismic data processing in complex area and area having low signal to noise ratio,having the advantages of high operation speed and good noise suppressed effect .