摘要
本文从分析海洋地震数据的特点出发,认为海洋地震数据处理必须十分重视以下问题:子波处理和修正、反褶积技术的应用、多次波的压制、长排列资料的速度分析、剩余静校正及三维资料的面元均化等。在此基础上着重探讨了子波处理和多次波压制技术。子波处理有两种情况:其一,在野外提供远场子波情况下,可利用远场子波提取反子波,进行反褶积,从而很好地消除地震数据中的仪器响应、虚反射及气泡的影响;其二,在没有采集远场子波信号时,可直接由原始地震数据提取地震子波,利用此子波的逆求反子波,也能获得较好的反褶积效果。至于海洋多次波的压制,现今有很多很好的方法可供选择,关键在于分析本区的多次波特征,选用有针对性的多次波压制方法。
From analyzing the characters of marine seismic data, the paper considered it should pay more attention to the following issues for marine seismic data processing: wavelet processing and modification, application of deconvolution technique, suppression of multiple, velocity analysis of long spread data,residual static corrections and bin-size uniformization of 3-D data. On that basis, the paper emphatically discussed wavelet processing and multiple-suppressed technique. There are two situations for wavelet processing: the one is deconvolution by using far-field wavelet to detect inverse wavelet in a condition that the far-field wavelet can be provided in the field, so that the influence of seismograph response, ghost reflection and bubble can be better removed from seismic data; the second is to directly detect the seismic wavelet from raw seismic data when failing to acquire the wavelet signal at far field,using the inverse of the wavelet to compute the inverse wavelet, which can result in good deconvolution results. As concerns the suppression of marine multiple,there are many better approaches to be selected, the key is to analyze the characters of the multiple in the region and select purposefully the multiple-suppressed approaches.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2007年第B08期8-13,共6页
Oil Geophysical Prospecting
关键词
海洋
数据处理
子波
多次波压制
marine, data processing, wavelet multiple suppression
