基于高阶统计的混合相位子波估计及其处理  

Estimation of mixed-phase wavelet base on higher-order statistics.

作　　者：李大卫[1] 田继东[1] 成竹[2] 杨旭明[2] 

机构地区：[1]西南石油学院,四川成都610500 [2]四川石油管理局地调处,四川成都610213

出　　处：《勘探地球物理进展》2005年第2期117-121,共5页Progress in Exploration Geophysics

基　　金：中国石油天然气股份有限公司科技风险创新基金项目"地震资料处理的高阶统计量方法研究"四川石油管理局地调处(编号:XZH-018)联合资助

摘　　要：与功率谱相比,地震记录高阶谱具有两大优点:①包含地震子波的幅值和相位信息;②能够有效压制有色噪声干扰。通过提取子波的幅值和相位,进而使地震子波得以恢复。同时,针对估计所得线性移位子波特点,提出了线性移位子波反褶积方法。模拟试验表明,双谱子波估计方法具有稳定性高、抗噪能力强等优点。经双谱子波估计方法处理的模拟地震资料,其频带较处理前明显拓宽,可见该方法是切实可行的。Compared to power spectra, higher-order spectra have two merits: containing information about the amplitude and phase of the wavelet; as well as effectively suppressing colored noises. We reconstructed seismic wavelet by extracting information of amplitude and phase. Furthermore, according to the characteristics of the estimated linearly shifted wavelet, we developed a new deconvolution method called linearly shifted wavelet deconvolution. The stability and noise-resistant ability of the method were verified by modeling. The frequency band of the processed data is noticeably spread.

关 键 词：子波估计 混合相位 高阶统计 模拟地震资料 地震子波 估计方法 子波反褶积 相位信息 地震记录 噪声干扰 模拟试验 抗噪能力 功率谱 高阶谱 稳定性 幅值 移位 线性 双谱 

分 类 号：P631.443[天文地球—地质矿产勘探] P631.4[天文地球—地质学]