物探化探计算技术2025，Vol.47Issue(3)：367-374,8.DOI:10.12474/wthtjs.20240416-0002
各向异性拟声波角度域逆时偏移成像技术研究
Pseudo-acoustic angle domain reverse time migration for anisotropic media
摘要
Abstract
Reverse time migration is an effective imaging tool for areas with substantial lateral velocity and complex structures,which adopts the numerical solution of the wave equation to wave field continuation and imaging.The anisotropy widely exists in the subsurface media,and ignoring its influence will lead to inaccurate imaging positions and incomplete convergence of diffracted waves.Based on the theory of anisotropic pseudo-acoustic reverse time migration,this paper first adopts wave field gradients to constrain and iteratively calculate the wave field propagation vector,enhancing the algorithm's stability and accuracy.Subsequently,the construction of the angle domain imaging condition and extraction of angle domain common imaging gathers are carried out based on the wave field propagation vector.Furthermore,the CPU and GPU collaborative parallel algorithm is used to improve computational efficiency,and a pseudo-acoustic angle domain reverse time migration imaging method for anisotropic media is proposed.The feasibility and effectiveness of the algorithm are also verified through numerical tests.关键词
各向异性/逆时偏移/波场传播矢量/角度道集Key words
anisotropy/reverse time migration/wave field propagation vector/angle gathers分类
地质学引用本文复制引用
肖建恩,秦宁,崔庆辉,赵爱国,王胜阁..各向异性拟声波角度域逆时偏移成像技术研究[J].物探化探计算技术,2025,47(3):367-374,8.基金项目
山东省泰山产业创新领军人才专项资助项目(NO.tscx202312059) （NO.tscx202312059）
中石化科技攻关课题(P23050,P24144) （P23050,P24144）
