砂岩型铀矿勘探的浅层三维地震资料针对性处理方法

Targeted processing method of shallow 3D seismic data for sandstone-type uranium deposits exploration

为了提高砂岩型铀矿勘探浅层三维地震资料处理效果,分析了浅层三维地震资料处理存在的问题及难点,并制定一系列针对性处理对策:精细模型法静校正、近地表吸收补偿、串联反褶积、叠前数据规则化和叠后拓频处理。实际数据测试表明,这些针对性对策使得成果数据的主频和频宽均提高50%±,同时信噪比和分辨率均有很大幅度提高。

In order to improve the effect of shallow 3D seismic data processing for sandstone-type uranium exploration,the existing problems and difficulties are analyzed,and a series of countermeasures are formulated,including fine model static correction,near surface absorption compensation,series deconvolution,pre-stack data regularization and post-stack frequency extension processing.The actual data testing shows that the dominant frequency and bandwidth of the result data are increased by about 50%,and the signal-to-noise ratio and resolution are greatly improved.