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GP280 - Labs

Assignment List
Name Description Due Download
Introduction to 3D geometries
Lab1.pdf
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. Apr 10th Lab1.tar.gz
3D preprocessing and prestack partial migration
Lab2.pdf
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. Apr 19th Lab2.tar.gz
Depth Imaging using RTM
Lab3.pdf
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. May 1stLab3.tar.gz
Seismic illumination and imaging through inversion
Lab4.pdf
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. May 15th Lab5.tar.gz
Angle gathers and residual migration
lab6.pdf
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. May 24th lab6v3.tgz
Full waveform inversion and image-space tomography
lab6.pdf
In this lab, you will implement a full waveform inversion scheme to estimate the velocity model of the subsurface. With experiments, you will analyze the FWI response to the frequency content in the data. Finally, you will code the adjoint of the image-space wave-equation tomography. June 3rd lab6v3.tgz





SEP
Stanford
Exploration Project
GP
Department of
Geophysics
SES
School of
Earth Sciences
Stanford
Stanford
University

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