一种改善相关子波特性的扫描信号

参考扫描信号与检波器所接收到的地层反射信号进行相关处理后得到的相关子波是构成震源相关地震记录的基本波形.因此,相关子波特性直接影响到可控震源地震记录的面貌与品质.品质优良的扫描信号可以有效地提高地震记录品质和施工效率.实验室分析表明,对数分段扫描信号的相关子波有着极小的相关边叶.为了对这种扫描信号的地震勘探效果进行验证,我们对对数分段扫描信号和普通线性扫描信号进行了地震勘探采集数据对比试验.试验结果表明,采用对数分段扫描信号的地震记录信噪比得到了明显改善.

A sweep signal improving characters of correlation wavelet

The correlation wavelet resulted from the correlation processing of reference sweeping signal with received reflection signals of strata is basic waveform constituting seismic correlation records of vibroseis.Therefore,the property of correlation wavelet directly affects the face and quality of seismic records of vibroseis.High-quality's sweeping signal can effectively improve the quality of seismic data and construction productivity.The lab analysis showed the correlation wavelet of log-partitioning sweeping signal has minimum correlation side lobe.In order to prove the effects of seismic exploration of this kind of sweeping signal,we make correlation test of seismic acquisition data of log-partitioning sweeping signal with common linear sweeping signal.The test results showed the S/N ratio of seismic data has been greatly improved by using log-partitioning sweeping signal.