物探与化探Issue(4)：805-811,7.DOI:10.11720/wtyht.2015.4.24
基于井数据约束的高精度层析速度反演
High-precision tomography velocity inversion based on well data constraint
摘要
Abstract
Logging data is considered to be prior information which is fairly accurate and reliable.The utilization of the logging velocity information in the tomographic inverse function system can enhance the precision and efficiency;Nevertheless,it fails to describe the small⁃scale targets exactly.In view of such a situation,the authors propose a high⁃precision tomography velocity inversion method based on the well data constraint in this paper.First,the traditional well data constraint tomography velocity inversion is performed.Under the presumption that he velocity of grids in the well position remains the same,the inversion function is establishd based on the well data constraint,the velocity field is updated,and the primary migration image is updated.Second,the logging velocity is used to restrain the migration depth,process velocity analysis and perform precise modeling,thus improving the modeling accuracy greatly.At the same time, the number of the inversion iteration is reduced and the precision is improved. Examples from the synthetic dataset and field data pro⁃cessing demonstrate the feasibility and validity of this method compared with traditional tomography velocity inversion and waveform in⁃version.关键词
测井速度曲线/井约束/走时层析/速度建模/反演精度Key words
logging velocity data/well data constraint/traveltime tomography/velocity modeling/inversion precision分类
天文与地球科学引用本文复制引用
白雪,李振春,张凯,宋翔宇,杨国权,尚江伟..基于井数据约束的高精度层析速度反演[J].物探与化探,2015,(4):805-811,7.基金项目
国家科技重大专项（2011ZX05006－002）；国家自然科学基金 （）
