基于同相轴追踪的多次波衰减  

Multiple Attenuation Based on Event Tracing

作　　者：谭军[1,2] 王修田[1,2] 

机构地区：[1]中国海洋大学海洋地球科学学院,山东青岛266100 [2]中国海洋大学海底科学与探测技术教育部重点实验室,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2012年第6期99-106,共8页Periodical of Ocean University of China

基　　金：国家高技术研究发展计划项目(2006AA09Z358)资助

摘　　要：提出一种基于同相轴追踪的多次波压制方法,其首先通过追踪与切除一次波叠加能量界定多次波的叠加速度范围,然后根据CMP域同相轴追踪技术获得多次波同相轴,再在多次波同相轴所属的短时窗内进行FK滤波压制处理。实验结果表明:该方法可追踪出与一次波叠加速度较为接近的多次波同相轴,能明显衰减近偏移距道的多次波,而仅在多次波同相轴所属的短时窗内进行的压制处理,可在一定程度上降低损伤一次波信号的可能性。A multiple attenuation method based on event tracing is presented. The method firstly delimits the stacking velocity area of the multiple by tracing and cutting off the primary wave energy, then finds out the multiple event by event tracing technique on CMP gathers, and suppresses the multiple through F-K filtering in short-time window around the event. The experimental results demonstrate that the method can trace a multiple event whose stacking velocity may close to the primary event, and can effectively attenuate multiples in the near-offset. The attenuation processing only within a shorttime window around a multiple event may, to some extent, clecrease the probability of damaging primary waves.

关 键 词：多次波压制 同相轴追踪技术 短时窗FK滤波 

分 类 号：P315.3[天文地球—地震学]