石油地球物理勘探2019，Vol.54Issue(2)：261-267,前插1,8.DOI:10.13810/j.cnki.issn.1000-7210.2019.02.003
快速回转波近地表速度建模方法
Fast near-surface model building with turning wave
摘要
Abstract
Conventional first-arrival travel time tomography based on iterative inversion is computationally intensive and time consuming,especially in a large-scale data processing.In order to improve the efficiency of near-surface modeling,a fast near-surface model building with turning wave is developed by assuming that the near-surface velocity is transversely constant within the maximum offset range and varies linearly with the depth.In order to improve the accuracy of inversion,a multi-datum correction method is adopted to reduce the influence of surface undulation on the inversion results.In order to enhance the stability of inversion,a local weighted ray parameter estimation is developed to increase the robustness with respect to noise.Synthetic and real data tests verify the validity and efficiency of the proposed method.关键词
近地表/层析/速度建模/反演/静校正/回转波Key words
near-surface/tomography/velocity model building/inversion/statics/turning wave分类
天文与地球科学引用本文复制引用
郭振波,孙鹏远,钱忠平,李培明,唐博文,熊定钰..快速回转波近地表速度建模方法[J].石油地球物理勘探,2019,54(2):261-267,前插1,8.基金项目
本项研究受中国科协青年人才托举工程项目(2016QNRC001)、国家科技重大专项"新一代地球物理油气勘探软件系统"(2017ZX05018-001)及中国石油天然气集团公司软件重大专项"宽方位及海洋资料处理软件研发与集成"(2016E-1002)联合资助. （2016QNRC001）
