Plane Wave Reverse Time Image for Nondestructive Tests

Reverse time migration (RTM) has been a popular method in industry duo to its ability of imaging complex subsurface and no dip restriction. However, RTM based on full matric capture (FMC) data is limited by the cost calculation cannot be widely used. In this study, new strategy using plane wave proposed. Plane reverse (PWRTM) does not need stack results from multiple sources directly uses as source function reconstruct image domain, reducing influence numerical dispersion PWRTM. Low-rank finite difference (LRFD) used wavefield simulation, core idea LRFD use quasi differential operator compensate error steps conventional difference. Mathematical derivation proves that algorithm can considered analytical homogeneous background velocity. We drive elastic PWRTM nondestructive testing, vector decomposition ensure phase amplitude characteristics P- S-wave are distorted. our compared with scalar Helmholtz method, proposed more efficiently accurately large angle defects.