用小波变换与能量比方法联合拾取初至波  

SEISMIC FIRST BREAK PICKUP USING WAVELET TRANSFORM AND POWER RATIO METHOD

作　　者：张军华[1] 赵勇[1] 赵爱国[2] 郑永波[2] 

机构地区：[1]石油大学,东营257062 [2]胜利油田物探研究院,东营257022

出　　处：《物探化探计算技术》2002年第4期309-312,336,共5页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：中国石油天然气集团公司物探重点实验室资助

摘　　要：首先用小波变换对原始炮点记录进行分解,然后用小波通道作为初至拾取的输入。拾取时,使用了能量比方法,该方法主要利用记录道在初至波前后能量上的差异。在此基础上,综合考虑时窗、相位、能量和过零点等多种因素,成功地切除了初至波。实际资料处理结果表明,本方法具有适应噪声能力强、计算速度快、操作简便、初至和切除准确等特点。Using wavelet transform (WT), the original shot records are first decomposed and wavelet channel is selected to pick first breaks. Because of the difference of the energy before and after first break pickup, we use power ratio method to pick the pulse time of first pick. Then by considering the factors of time gate, energy, phase and zero-crossing point, etc., the first breaks are successfully cut. The result shows that this method is very feasible and effective.

关 键 词：地震波初至 小波变换 能量比 自动拾取 噪声 地震资料处理 

分 类 号：P631.44[天文地球—地质矿产勘探] TN91[天文地球—地质学]