物探化探计算技术Issue(5)：583-586,4.DOI:10.3969/j.issn.1001-1749.2014.05.12
初至波地震层析成像中自动生成初始速度模型的方法研究
Automatically building the initial velocity model in first-arrival seismic tomography
摘要
Abstract
The initial velocity model is primary given in first-arrival seismic tomography,the quality of tomography inver-sion,convergence and convergence speed are effected mostly by the initial velocity model.An automatically building initial ve-locity model using first-arrivals has been proposed with near-surface velocity fields tomographic inversion in the paper.As-suming that the first-arrivals are consist of the direct waves and refraction waves,then the initial velocity model is directly cal-culated by refraction method,which can be realized automatically by program without factitious interfere.The method is ap-plied to the theory model and actual data,then the iterative tomography technique is applied to obtain actual velocity model based on the initial velocity model.The results show that the method is effective with quickly convergence,and the inversion results are consist with real velocity model.关键词
层析成像/大炮初至/初始速度模型/折射波法Key words
tomography/first-arrival/initial velocity/refraction wave method分类
天文与地球科学引用本文复制引用
陈爱萍,邹文,何光明,李亚林,罗红明,曹中林..初至波地震层析成像中自动生成初始速度模型的方法研究[J].物探化探计算技术,2014,(5):583-586,4.基金项目
中国石油天然气集团公司科学研究及技术开发项目 （）
