Differential Semblance Optimization (DSO) has been shown to be a stable and robust formalism for a number of seismic inverse problems. It has been shown to work well for Wave-Equation migration velocity analysis (MVA), which may overcome some of the problems of ray-based methods. However, velocity updates calculated from the DSO-MVA gradient suffer from artifacts in the form of strong near-vertical stripes, which are not seen in ray tomography or some other formulations of wave-equation MVA. We analyze the source of these artifacts and propose a modification to the update search direction to avoid them. Numerical tests confirm our approach, which eliminates this kind of artifact and speeds up convergence.
Skip Nav Destination
On the Gradient Artifacts In Migration Velocity Analysis Based On Differential Semblance Optimization
Paper presented at the 2010 SEG Annual Meeting, Denver, Colorado, October 2010.
Paper Number: SEG-2010-4071
Published: October 17 2010
Fei, Weihong, and Paul Williamson. "On the Gradient Artifacts In Migration Velocity Analysis Based On Differential Semblance Optimization." Paper presented at the 2010 SEG Annual Meeting, Denver, Colorado, October 2010.
Download citation file:
Don't already have an account? Register