基于预测滤波的层间多次波衰减方法  

Inter-layer Multiple Attenuation Method based on Predictive Filtering

作　　者：首皓 孙鲁平[2] 丁玲 SHOU Hao;SUN Luping;DING Ling(Research Institute of Petroleum Exploration and Development,Petro China,Beijing 100083,China;School of Geophysics and Information Technology,China University of Geosciences,Beijing 100083,China)

机构地区：[1]中国石油天然气股份有限公司勘探开发研究院,北京100083 [2]中国地质大学(北京)地球物理与信息技术学院,北京100083

出　　处：《现代地质》2023年第1期121-126,共6页Geoscience

基　　金：国家自然科学基金青年科学基金项目(42204128)。

摘　　要：在地震勘探中由于与反射信号时差小,层间多次波在近偏移距难以完全去除。地震剖面道集上近偏移距多次波的存在增加了反演的多解性,此外多次波在叠加剖面上形成的假反射也增加了解释的误差。提出一种基于预测滤波的层间多次波衰减方法,首先通过倾角滤波衰减中远偏移距的多次波,然后将含有残留的层间多次波的道集按照随机顺序排序,最后应用预测滤波方法按照随机干扰去除剩余的层间多次波。经实际数据检验,本方法对近偏移距小时差层间多次波具有良好的衰减效果。Because of the small time difference with the reflected signal, it is difficult to completely remove inter-layer multiples at the near offset. The presence of near offset multiples on the gathers increases the inversion multiplicity. In addition, false reflection by multiples on the stack section also increases the interpretation risk. In this study, an attenuation method of inter-layer multiples based on predictive filtering is proposed. First, the multiples of middle and long offset are attenuated by dip filtering;Second, the gathers containing residual inter-layer multiples are sorted in random order;Third, the residual inter-layer multiples are removed by predictive filtering. Through testing the actual data, our method presented here has good attenuation effect on inter-layer multiples, with short offset and small time difference.

关 键 词：陆上地震数据 层间多次波 预测滤波 

分 类 号：P631.4[天文地球—地质矿产勘探]