Next:
Preface
Stanford Mathematical Geophysics Summer School Lectures
Basics of Exploration Seismology and Tomography
Gerard T. Schuster
Geology and Geophysics Department
University of Utah
Preface
Contents
Basics of Exploration Seismic Experiments and Data Processing
Introduction
Seismic Images of the Earth
Seismic Experiment
Seismic Sources
Recording Equipment
Common Shot Point Gathers
Common Midpoint Gathers
Apparent Velocity
RMS Velocity
Basic Processing Steps
Automatic Gain Control to Correct for Geometrical Spreading+Anelastic Losses.
Muting.
Bandpass Filter Data to Remove Noise.
Static Corrections to Remove Elevation and Near-Surface Heterogeneities.
Velocity Filter Data to Remove Surface Wave Noise.
Normal Moveout Correction to Align Offset Reflections with ZO Reflections.
Velocity Analysis to Determine Vstack.
Stacking to Remove Coherent+Random Noise.
Poststack Migration to Go from Data Space to Model Space.
Summary
References
Basics of Traveltime Tomography
Introduction
Theory
Steepest Descent
SIRT Method
Numerical Example: Seismic CAT Scan of an Ancient Earthquake by 3-D Refraction Tomography
Numerical Example: Friendswood Crosswell Traveltime Tomography
Summary
Appendix A: Perturbed Traveltime Integral
Appendix B. Error Analysis
Appendix C: Model Uniqueness and Convergence
Appendix D: Resolution
References
Basics of Waveform Tomography
Introduction
Waveform Inversion Algorithm
Case 1: Prestack Migration.
Case 2: Postack Imaging.
Physical Interpretation
Loudspeakers and Forward Light Cones
Loudspeakers and Backward Light Cones
Backpropagated Residuals
Direct Waves
Summary
References
Appendix 1
About this document ...
Gerard Schuster
1998-07-29
Direct Waves