广义线性反演初至折射静校技术在金属矿区的应用

在复杂地表地区,近地表速度构造模型的确定在地震资料处理和成像过程中是一个至关重要的工作.针对传统方法只能解决静校正中的部分问题,精度不高,本文采用的广义线性反演折射法,利用初至时间对大量数据进行统计,用交互、迭代的方法计算静校正量.该法在土屋斑岩铜矿区的应用,表明在提高信噪比方面比较传统方法有明显的提高.

Technique of GLI first-break refraction statics corrections and it's application in metal deposit

Determining near-surface velocity structures is a crucial first step in seismic data processing and imaging in geologically complex areas.The traditional refraction methods are inaccurate and incapable of recovering near-surface structures in geologically complex areas.We discuss the GLI first-breaks refraction static method,which is an iterative inversion algorithm and can get not only long wavelength solution,but also short wavelength solution.Applying the method in Tuwu porphyry copper deposit terrain covered with loose stones or soil,signal-to-noise ratio and accuracy have been improved significantly over the traditional refraction.