不规则地震数据的抗假频重建方法

英文篇名：Studies on anti-aliasing reconstruction method for irregular seismic data
中文刊名：石油地球物理勘探
英文刊名：Oil Geophysical Prospecting
作者：高建军 ; 陈小宏 ; 李景叶 ; 张南南 ; 刘志鹏
英文作者：Gao Jian-jun1 ; 2 ; Chen Xiao-hong1 ; 2 ; Li Jing-ye1 ; 3 ; Zhang Nan-nan1 ; 2 and Liu Zhi-peng1 ; 2.1.State Key Laboratory of Petroleum Resources and Prospecting ; China University of Petroleum ; Beijing City ; 102249 ; China2.CNPC Key Lab of Geophysical Prospecting ; China University of Petroleum ; Beijing City ; 102249 ; China3.Education Ministry Key Lab of Oil&Gas Accumulation Mechanism ; China University of Petroleum ; Beijing City ; 102249 ; China
中文关键词：不规则地震数据 ; 带限Fourier重建 ; 多步自回归算法 ; 地震数据重建
英文关键词：irregular seismic data ; band-limited Fourier Reconstruction ; multi-step autoregressive algorithm ; seismic data reconstruction
出版日期：2010-06-15
机构：中国石油大学(北京)油气资源与探测国家重点实验室;中国石油大学CNPC物探重点实验室;中国石油大学石油天然气成藏机理教育部重点实验室;
年：2010
期：03
出版单位：石油地球物理勘探

摘要

不规则采样地震数据会对地震数据多道处理的效果造成严重影响。本文将单步预测滤波拓展到多步预测滤波,基于多步自回归预测滤波方法,实现对不规则地震数据的分步、抗假频重建方法。文中首先运用带限Fourier重建方法对不规则地震数据进行规则化重建,得到无假频低频数据的频率谱;接着使用多步自回归算子从重建数据的无假频低频谱中提取整个有效频带的预测滤波因子;然后利用已知道数据和预测滤波因子重建得到完整数据的频率谱,最终实现不规则地震数据的抗假频重建。理论模型和实际资料的处理结果验证了本文方法的有效性。
It is well-known fact that the irregularly sampled seismic data (call irregular seismic data thereafter) will seriously affects the data processing quality for multi-channel seismic data processing.In this paper the single-step predictive filtering was expanded to multi-step predictive filtering on which step by step and anti-aliasing reconstruction method was realized.At first the band-limited Fourier reconstruction method was applied to reconstruct irregular seismic data,and the frequency spectrum for alias-free low frequency data was estimated,and then by utilization of construction of the known data and predictive filtering factor the frequency spectrum of the full data was obtained,and at last anti-aliasing reconstruction for irregular seismic data was realized.The theory model and processing for field data proved the validity of the method.

引文

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