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GP280 - Labs

Assignment List
Name Description Due Download
Introduction to 3D geometries
In this exercise, you will explore two 3D land acquisition geometries, and begin to learn how to manipulate prestack seismic data with the SEPlib3d (``SEP3d'') processing system. The first geometry comes from a shallow seismic experiment, and the second from an exploration survey. There are no programming tasks required, although the lab does require you to run SEP3d programs yourself, either from the command-line or from a Makefile. Jan 18th Lab1.tgz
3D preprocessing and prestack partial migration
In this assignment you will carry forward the knowledge gained in the previous assignment to perform some preprocessing steps on a real 3-D dataset, using SEP3d tools. Then you will have a hands-on experience with Azimuth Move-Out, a 3-D prestack partial migration operator. original: Jan 27th; extended: Jan 30th Lab2.tgz
High-frequency imaging
In this exercise you will see how wave-propagation effects influence imaging in a medium with a complex velocity structure. We analyze the implications of complex wave propagation on Kirchhoff migration. Feb 13thLab3.tgz
Depth Imaging using RTM
In this exercise you will familiarize yourself with full wave-equation modeling, reverse time migration (RTM) and sub-surface common image gathers. You will be given a partially completed reverse time migration code to complete. In order to gain first-hand experience, you will then depth-migrate several pre-stack images of the SEG-EAGE salt model. Then you will modify the code to construct the sub-surface offset gathers after imaging. Feb 25thLab4.tgz
Seismic illumination and imaging through inversion
In this lab, you will perform seismic illumination analysis on a synthetic data set, you will get hands on experience with the scattering wavenumber vectors which are closely related to the subsurface illumination. You will also investigate an efficient method based on phase encoding for Hessian computation. Finally, you need to code the forward operator which convolves the local Hessian operator with the reflectivity model and also its adjoint. Your will use your code to invert for the reflectivity for the Sigsbee2A model. Mar 8th Lab5.tar.gz
Angle gathers, residual migration, and tomography
In this lab, you will have a chance to experiment with different domains in which we can analyze the migrated images: the offset-domain and the angle-domain. You will also experiment with residual migration and analyze the implications such a process has on velocity analysis. Finally, you will code the adjoint of the image-space wave-equation tomography. March 16th lab6v3.tgz

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