高速岩体反射地震探测中的数据采集与处理

Reflection Seismic Data Acquisition and Processing Technology Used in Detecting the High-Velocity Rock Body

为了调查内蒙古阿拉善某高放废物地质处置库预选场址中目标花岗岩体的空间展布、内部结构和边界接触关系,应用人工反射地震探测技术,采集数据并进行处理,获得了针对大型高速岩体的近地表速度剖面和地震反射波法成像剖面。针对崎岖地表工区近地表速度建模与层析静校正、强散射干扰波压制等问题,引进基于MSFM射线追踪算法的初至波旅行时层析反演与层析静校正技术、改进的矢量分解压噪方法等,并在常规高分辨反射地震数据处理流程的基础上形成了适合于高速岩体地震探测的精细数据处理流程。

In order to investigate the spatial distribution,internal structure,and boundary contact relations of target granite rock at Inner Mongolia Alxa pre-selected high-level radioactive waste geologicalrepository site,seismic detecting work is carried out.Near-surface velocity tomography inversion profiles and seismic reflection profiles are obtainedby acquiring and processing the seismic data.This seismic exploration work aimsat technical problems such as ruggedness surface work area near-surface velocity model-building,tomographic statics correction,and strong seismic scattered wave pressing.To this end,we adoptakind of MSFM（multi-stencils fast marching）based first-arrival travel-time tomography inversion technology,and an improved vector resolution noise removal approach.Meanwhile,based on routine high resolution reflection seismic exploration data processing flow,a set of customized fine data processing flow is set up.