串联SRME在涠西南地区多次波衰减中的应用

在浅水区域的海洋地震勘探中，海底与水面波阻抗差异较大，形成了大量的短周期海底多次波（鸣震）及微屈多次波，严重影响了地震资料的真实性与可靠性，此类多次波一般采用自由地表相关多次波压制（SRME）；涠西南某工区由于基底较浅且与老地层波阻抗差异较大，所以除海面与海底外存在第三个多次波源，尤其在基底处产生的海底微屈多次波，离基底较近，很容易被误认为是基底，此类多次波采用传统的SRME方法无法有效压制，笔者采用基于波动方程模型与褶积模型串联SRME对其进行压制，实际资料处理结果显示该方法对多次波压制效果较为明显。

THE APPLICATION OF SERIES SRME METHOD TO MULTIPLE WAVE ATTENUATION IN SOUTHWEST WEIZHOU AREA

In marine seismic survey, the difference of wave impedance between water bottom and surface is remarkable, and hence there are lots of short period multiple waves and micro-bending multiple waves in the marine seismic data,which affects seismic data quality seriously. Usually Surface Related Multiple Elimination （SRME） is used to suppress these multiple waves. In an area of Southwest Weizhou, the basement is shallow, and its wave impedance has considerable difference from the wave impedance of the old formation, so in addition to water bottom and surface there are the third multiple wave sources, and there is a water bottom multiple wave very close to that of the basement. Conventional SRME couldnt attenuate the multiple waves. The authors used series SRME based on wave equation model and convolution model to suppress them, and the result is obvious.