海洋地质前沿2026，Vol.42Issue(6)：11-19,9.DOI:10.16028/j.1009-2722.2025.145
基于微分方程滤波方法的海洋垂直缆波场分离
Wavefield separation of marine vertical cable seismic by differential-equation-based filtering method
摘要
Abstract
Marine vertical cable seismic(VCS)is an unconventional exploration method that acquires seismic data through vertically deployed hydrophone arrays,enabling high-resolution imaging of subsea geological struc-tures.However,due to the limited number of acquisition channels in the field practice,conventional wavefield separation methods,such as frequency-wavenumber(f-k)filtering and radon transform,often suffer from insuffi-cient spatial sampling,serious dispersion,and waveform distortion,making it difficult to achieve high-precision separation of upgoing and downgoing wave fields.To address this challenge,we introduced a differential-equation-based filtering(DEBF)method for wavefield separation in VCS data processing.The approach involves design-ing a zero-phase filter in the f-k domain,transforming it into the time-space domain,and implementing stable and efficient wavefield separation using finite-difference algorithms.This method demonstrates excellent amplitude fi-delity and adaptability.Tests on both synthetic and real datasets showed that the proposed method could effect-ively separate upgoing and downgoing wavefields even with limited channel counts,which significantly outper-formed conventional techniques in terms of separation quality and reliability.关键词
垂直缆/波场分离/基于微分方程的滤波/有限差分/零相位滤波Key words
vertical cable seismic/wavefields separation/differential-equation-based filtering/finite-difference/zero-phase filtering分类
海洋科学引用本文复制引用
张子龙,尉佳,王林飞,刘怀山..基于微分方程滤波方法的海洋垂直缆波场分离[J].海洋地质前沿,2026,42(6):11-19,9.基金项目
国家重点研发计划资助项目(2024YFC2814901) （2024YFC2814901）
