约束法分解P—L变换压制多次波

Multiple suppression by decomposed P-L transform and amplitude constraint

1. 涿州石油物探局研究院,涿州072750;2. 中国地质大学,北京100083

Research Institute, Bureau of Oil Ceophysical Prospecting, Zhuozhou 072750

多次波严重干扰地震勘探成果。通常的多次波压制方法无法解决近道多次波问题。本文提出一种新的压制多次波的方法——约束法分解P—L变换压制多次波, 该方法可以较好地压制整个排列上的多次波, 且尽可能地保持振幅随炮检距的变化关系。通过理论模型和实际地震资料计算, 证明该方法对压制多次波是行之有效的。

Multiples are severe disturbance waves in seismic prospecting. The commonly usedmultiple suppression methods can not solve the near-trace multiple problem. This paper presents anew multiple suppression method-decomposed P-L transform with constraint. The method canwell suppress multiples along a whole array and preserve the amplitude variations with offset. Itseffectiveness is showed by the computation of theorectical models and real seismic data.