Bits and Pieces
Define and review the geometric shapes of the semicircle, ellipse, and hyperbola from the perspective of modelling and migration.
Define and evaluate instantaneous, interval, average, stacking, RMS, DMO, and migration velocities.
Gain insight to the Fourier transform and aliasing.
Become acquainted with the wave equation and be exposed to some methods of applying it to seismic data.
Identify the differences between time and depth migrations.
Figures & Tables
This volume, SEG Course Notes Series No. 13, is designed to give the practicing geophysicist an understanding of the principles of poststack migration, presented with intuitive reasoning rather than laborious math. Modeling is introduced as a natural process that starts with a geologic model and then builds seismic data. Migration is then described as the reverse process that uses seismic data to find the geologic model. Many other topics are covered relating to the quality of the migrated section, such as aliasing, rugged topography, or use of the correct velocity. Significant new material has been added in this revised edition of the original 1997 book, especially algorithms based on the phase-shift method, such as PSPI and the omegaX method.