GeoEast多次波压制技术在陆上地震资料处理中的应用

Multiple elimination methods provided by GeoEast for land seismic data

多次波使目的层的反射波形态发生畸变,干扰了地震成像,如果不有效压制和消除,则最终会使勘探成果受到较大影响。因此正确认识和有效压制多次波成为地震勘探中的一个重要课题。现今GeoEast系统中针对多次波开发了一系列模块,如共中心点叠加、内切除、聚束滤波、Radon变换、高精度Radon变换、预测反褶积、自由表面多次波压制以及波场延拓多次波压制等,几乎涵盖了所有压制多次波的方法。本文着重介绍高精度Radon变换以及基于波场延拓的多次波预测减去法在陆上地震资料处理中的应用以及取得的效果,并首次将波场延拓多次波预测模块应用于叠后数据,取得了较好的效果。

Multiples distort primary reflections and affectseismic data imaging.Therefore multiples elimination is one of key issues in seismic data processing.GeoEast provides a series of multiples elimination modules with different algorithms,such as CMP stacking,inner mute,beam forming,Radon transform,high-precision Radon transform,predictive deconvolution,surface-related multiple elimination,and wave field continuation multiple suppression.We present in this paper application results of the high-precision Radon transform and the predict-subtraction method based on wave field continuation in land seismic data processing.And for the first time we apply the wave field continuation multiple suppression on post-stack data sets and obtain encouraging results.