物探与化探2025，Vol.49Issue(5)：1090-1098,9.DOI:10.11720/wtyht.2025.0037
川东北探区层析与全波形反演联合建模方法及应用
Tomography-FWI modeling method and its application for the exploration area of northeastern Sichuan Basin,China
摘要
Abstract
The Puguang exploration area in the northeastern Sichuan Basin,China,is characterized by complex surface and subsurface conditions due to the influence of multistage tectonic movements.This dual complexity poses a challenge to precisely characterizing spe-cial geobodies like anhydrites in this area,leading to inaccurate velocity field establishment.Consequently,the seismic imaging quality is severely degraded,hindering the fine-scale exploration and production of oil and gas.To enhance velocity modeling accuracy and im-prove seismic modeling and imaging effects for complex structures,this study investigated the application of a joint velocity modeling method integrating full waveform inversion(FWI)for complex mountainous terrain.A depth-domain velocity modeling workflow based on FWI was developed for the Puguang exploration area.The joint inversion combining tomography and FWI,enhanced by incorporating ge-ological constraints to improve FWI stability,results in a velocity model that effectively matches the subsurface structures.The test using actual data demonstrates that FWI can significantly improve the detail characterization accuracy of velocity models for complex transition zones.This improvement is particularly evident in the enhanced imaging of complex structures in the Dawan and Maoba blocks in the Puguang exploration area.关键词
全波形反演/深度域偏移/速度建模/普光探区Key words
full waveform inversion(FWI)/depth migration/velocity modeling/Puguang exploration area分类
天文与地球科学引用本文复制引用
国运东..川东北探区层析与全波形反演联合建模方法及应用[J].物探与化探,2025,49(5):1090-1098,9.基金项目
国家科技重大专项课题(2024ZD14001-004) （2024ZD14001-004）
中石化集团公司项目(P23142) （P23142）
