物探化探计算技术2025，Vol.47Issue(3)：360-366,7.DOI:10.12474/wthtjs.20240320-0001
面向盐下目标的双程波照明模拟及二维采集观测系统优化分析
Two-way wave based seismic illumination modeling and 2D seismic acquisition optimization analysis for sub-salt target
摘要
Abstract
Seismic illumination effectively evaluates and optimizes seismic acquisition geometry under a complex geological background.In response to conventional ray tracing and one-way wave equation-based methods that are not able to adapt to intense velocity variations of complex salt structure models,we present a wave theory-based wave extrapolation algorithm and a seismic illumination simulation method.The wave field extrapolation was performed in the time domain using the two-way acoustic equation's first-order staggered grid finite difference expression.Then,seismic illumination was performed on the basis of it.For a designed 2D salt diaper model,seismic illumination was simulated under a single source and also a combination of different 2D seismic acquisition geometries.Meanwhile,the seismic illumination of salt flanks and sub-salt strata under different acquisition and observation systems was analyzed,combining RTM results from forward modelled shot gathers.The results showed that the seismic imaging significantly varies under different acquisition and observation systems for complex salt structure models.The actual salt structure-related seismic acquisition and processing design requires target-oriented geological model,high-precision seismic illumination simulation,and seismic observation system evaluation.关键词
地震照明/逆时偏移/有限差分/交错网格/采集设计Key words
seismic illumination/reverse time migration/finite difference/staggered grid/seismic acquisition designing分类
地质学引用本文复制引用
尹川,韩文明,张世鑫,陈建光,杨浩..面向盐下目标的双程波照明模拟及二维采集观测系统优化分析[J].物探化探计算技术,2025,47(3):360-366,7.基金项目
中国海洋石油有限公司"十四五"重大科技项目(KJGG2022-0903) （KJGG2022-0903）
