Tutorial: Velocity estimation via ray-based tomography

Tomographic inversion forms the basis of all contemporary methods of updating velocity models for depth imaging. Over the past 10 years, ray-based tomography has evolved to support production of reasonably reliable images for data from complex environments for models with modest lateral velocity variation scale lengths. In this tutorial, the basics of ray-based tomography are described along with the concepts behind full waveform tomography.

[1]  Christof Stork,et al.  REFLECTION TOMOGRAPHY IN THE POSTMIGRATED DOMAIN , 1992 .

[2]  J. Scales.  Tomographic inversion via the conjugate gradient method , 1987 .

[3]  D. Jackson.  Interpretation of Inaccurate, Insufficient and Inconsistent Data , 1972 .

[4]  Sven Treitel,et al.  Inversion with a grain of salt , 1985 .

[5]  P. Inderwiesen,et al.  Fundamentals of Seismic Tomography , 1994 .

[6]  G. Backus,et al.  The Resolving Power of Gross Earth Data , 1968 .

[7]  J. Claerbout,et al.  Incorporating geologic information into reflection tomography , 2004 .

[9]  Aldo Vesnaver,et al.  Getting rid of the grid , 1995 .

[10]  R. G. Pratt,et al.  Two‐dimensional velocity models from wide‐angle seismic data by wavefield inversion , 1996 .

[11]  A. Levander,et al.  A Comparison of Ray-Based and Waveform Tomography - Implications for Migration , 2002 .

[12]  R. Gerhard Pratt,et al.  Efficient waveform inversion and imaging: A strategy for selecting temporal frequencies , 2004 .

[13]  I. Vasconcelos.  Generalized Representations of Perturbed Fields - Applications In Seismic Interferometry And Migration , 2008 .

[14]  M. Worthington,et al.  An introduction to geophysical tomography , 1984 .

[15]  John Sherwood,et al.  Velocity and interface depth determination by tomography of depth migrated gathers , 1996 .

[16]  Jan H. Kommedal,et al.  3D Waveform Inversion on Valhall Wide-azimuth OBC , 2009 .

[17]  R. T. Cutler,et al.  Tomographic determination of velocity and depth in laterally varying media , 1985 .

[18]  J. Guiziou,et al.  SISTRE: A time‐to‐depth conversion tool applied to structually complex 3‐D media , 1990 .

[19]  Charles H. Sword.  Tomographic Determination of Interval Velocities From Picked Reflection Seismic Data , 1986 .

[20]  Aldo Vesnaver,et al.  Irregular grids in seismic tomography and minimum-time ray tracing , 1996 .