声波测井资料弱初至波检测新方法  

New Method for Weak First Arrival Picking from Full Sonic Waveform

作　　者：胡文祥[1] 

机构地区：[1]江汉石油学院地球物理勘探系

出　　处：《石油天然气学报》1994年第S1期23-25,共3页Journal of Oil and Gas Technology

摘　　要：提出一种基于对波形包络信号进行统计分析的初至波检测新方法．该方法利用信号道大、小时窗内波形包络能量的比值变化来检测初至信号．实际资料试处理结果表明，对多层套管井全波资料和裂缝地层环行声波资料进行处理时，取０．２～０．４倍脉冲极值作为门槛值可检测到各种弱初至波。new method of first arrival picking is proposed on the basis of the amplitude envelope for full sonic waveform. The method uses the changes of energy ratio between the long window and the short window to pick first arrivals. For the multilayer cased borehole and the circumferential sonic waveform in fractured formations. the results processed show that this method is very efficient for picking weak first arrivis.

关 键 词：声波测井 首波 波形 希尔伯特变换 脉冲 振幅包络 

分 类 号：P631.8[天文地球—地质矿产勘探]