作者: Yogesh Agnihotri , George A. McMechan
DOI: 10.1190/1.2780221
关键词: Geology 、 Slowness 、 Azimuth 、 Ray tracing (physics) 、 Seismic wave 、 Vertical seismic profile 、 Geodesy 、 Linear polarization 、 Polarization (waves) 、 Seismic migration
摘要: Conventional Kirchhoff migration can be made much faster by a priori calculation of wave arrival directions, and tracing rays back only along the measured directions; this is known as parsimonious migration. For surface seismic data, where acquisition with 2D arrays common, directions using local slant stacking to calculate two horizontal slowness components. The vertical then deduced dispersion relation. profile (VSP) multiline not possible, component vector measured, which insufficient constrain direction. We overcome limitation for three-component VSP data polarization analysis incident waves. Polar azimuth anglesare calculated at receivers estimating covariance matrix slowness, assuming isotropic media linear both P- S-waves. P-waves, co...