VSP近波场采集方法研究

A STUDY OF VSP NEAR FIELD ACQUISITION METHOD

为了从零偏VSP初至波变化中 ,提取更多的有用地球物理信息 ,首先应该消除因震源子波不同而造成的影响。解决这一问题的办法是在震源附近设置一震源监视检波器 ,利用监视检波器记录的子波对每道记录作震源子波整形处理。如何获取真实、可靠的震源监视子波呢 ?本文通过近波场子波观测系统试验 ,对不同参数的记录和频谱进行对比、分析 ,得到VSP近波场最佳震检距。结合已测VSP资料 ,对影响子波主要因素———表层结构的影响进行研究 。

In order to derive more useful geophysical informations from the variation of the first break of zero-offset VSP data,the impact caused by the difference of source wavelet should be eliminated at first.The way to solve this problem is to set a source monitoring geophone near by the source and to make a source wavelet shaping processing to the records of every trace with the wavelet recorded by the monitoring geophone.How will the true and reliable source monitoring wavelet be gained?In this paper,an optimal...