Next:
Introduction
Up:
Table of Contents
Marie L. Clapp
Imaging under salt: illumination compensation by regularized inversion
Abstract
Introduction
Conventional methods
Overview of thesis
Imaging with migration
Imaging with inversion
Real data results
Assumptions
Migration in complex areas
Surface-related domains: shot and offset
Subsurface-related domain: reflection angle
Seismic wave propagation
Kirchhoff migration methods
Problems with Kirchhoff methods
Downward-continuation migration methods
Downward continuation
Slant stacking
Problems in ADCIGs
Imaging by inversion
Downward-continuation migration as an imaging operator
Adjoint vs. inverse operators
Least-squares inversion
Regularized least-squares inversion
Regularized inversion
Regularized Inversion with model Preconditioning (RIP)
Regularization schemes and operators
Effects of model regularization on the data space
RIP in practice
Expanded fitting goals
Accommodating the model space regularization in the data space
RIP vs. model space weighting
Regularization considerations
Regularization operator accuracy
Velocity sensitivity
Amplitude considerations
Real data results
The dataset
2-D results
Geophysical RIP
Geological RIP
3-D results
Comparison of 3-D stacked results
Comparison of unstacked inline results
Summary
REFERENCES
About this document ...
Stanford Exploration Project
10/31/2005