Velocity Analysis by Iterative Profile Migration |
Contents
Principle of Prestack Migration Velocity Analysis | 11 |
Source extrapolation terms for point and line sources | 57 |
Profile migration of a diffraction curve | 71 |
Copyright | |
Common terms and phrases
aligned horizontally average slownesses cable extent CMP gather compute constant velocity constraints conventional velocity analysis CRG's cross-correlation curvature curved upward depth(km dipping reflector divergence correction downward continuation edge diffractions equation 2.3 error in velocity extrapolation fault-plane reflection Green's function Hankel function horizontal reflector hybrid method image obtained initial velocity model interval velocities interval-slowness model interval-velocity model obtained îo)² iteration iterative method km/sec lateral velocity variations line source location(km medium migrate the data migrated image migrated profiles migrating and stacking migration velocity analysis model in Figure normal moveout Note objective function obtained by migrating offset offset(km phase shift post-stack migration prestack migration velocity profile migration profile of Figure ray tracing rms velocities shot axis shown in Figure shows source and receivers space stacked section subsurface summation synthetic profile thesis time(sec velocity analysis method velocity analysis principle velocity error velocity panel velocity varies laterally zero-offset