基于Tesseral的盲源地震响应恢复影响因素研究

Influencing factors of blind source seismic response recovery based on Tesseral

将盲源地震波记录中有用的反射波信号恢复并降低噪声影响,历来是地震勘探数据处理环节中的一个难题.本文利用tesseral软件,通过建立一个典型凹陷模型,对影响盲源地震响应恢复的六个主要因素:自由表面、被动源的震源分布、被动源数目、被动源子波信号的持续时间、震源子波类型和随机噪声的响应特征分别进行研究,研究结果表明,各影响因素对盲源地震响应恢复质量均有一定程度的影响,其中被动源的震源分布情况、能捕获的被动源数目和被动源持续时间这三个因素直接决定了被动源地震响应的恢复质量,能否接收到来自自由地表的多次波,决定了地震响应恢复的可能性.这对实际地震勘探数据处理具有一定的指导意义.

This is a difficult problem in seismic exploration data processing that restoring the useful reflected waves and reducing the noise impact in the blind source seismic record.In this paper,analyzed the six main factors that affecting the recovery of blind source seismic response by establishing a typical concave model.These factors are free surface,source distribution of passive source,number of passive sources,duration of passive source wavelet signal,source wavelet type and random noise.The source distribution of the passive source,the number of passive sources,and the duration of the passive source directly determine the passive source seismic response recovery quality.The possibility of seismic response recovery determined by receive multiple waves from the free surface.