Model-based Depth Imaging
Model-based Depth Imaging

Author: Stuart Fagin

Publisher: SEG Books

Published: 1998

Total Pages: 184

ISBN-13: 1560800852

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This is an informal review of the principle techniques and issues associated with prestack depth imaging. The intended audience for this book would be those seismic interpreters, processors, managers, and explorationists who require basic familiarity with the technology that has so greatly expanded the range of geologic structures that can be successfully imaged. The emphasis of the book is on velocity-model building techniques that are the key to successful depth imaging.

Land Seismic Case Studies for Near-Surface Modeling and Subsurface Imaging
Land Seismic Case Studies for Near-Surface Modeling and Subsurface Imaging

Author: Öz Yilmaz

Publisher: SEG Books

Published: 2021-06-30

Total Pages: 1056

ISBN-13: 1560803800

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Written for practicing geophysicists, “Land Seismic Case Studies for Near-Surface Modeling and Subsurface Imaging” is a comprehensive guide to understanding and interpreting seismic data. The culmination of land seismic data acquisition and processing projects conducted by the author over the last two decades, this book contains more than nearly 800 figures from worldwide case studies—conducted in both 2D and 3D. Beginning with Chapter 1 on seismic characterization of the near-surface, Chapter 2 presents near-surface modeling by traveltime and full-wave inversion, Chapter 3 presents near-surface modeling by imaging, and then Chapter 4 includes detailed case studies for near-surface modeling. Chapter 5 reviews single- and multichannel signal processing of land seismic data with the key objective of removing surface waves and guided waves that are characterized as coherent linear noise. Uncommon seismic data acquisition methods, including large-offset acquisition in thrust belts to capture the large-amplitude supercritical reflections, swath-line acquisition, and joint PP and SH- SH seismic imaging are highlighted in Chapter 6, and Chapter 7 presents image-based rms velocity estimation and discusses the problem of velocity uncertainty. The final two chapters focus exclusively on case studies: 2D in Chapter 8 and 3D in Chapter 9. An outstanding teaching tool, this book includes analysis workflows containing processing steps designed to solve specific problems. Essential for anyone involved in acquisition, processing, and inversion of seismic data, this volume will become the definitive reference for understanding how the variables in seismic acquisition are directly reflected in the data.

3D Seismic Imaging
3D Seismic Imaging

Author: Biondo Biondi

Publisher: SEG Books

Published: 2006

Total Pages: 256

ISBN-13:

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Accompanying CD-ROM includes PDF slides for teaching the material in the book and the C3-narrow-azimuth classic data set.

Tomographic Determination of Seismic Velocity Models with Kinematic Wavefield Attributes
Tomographic Determination of Seismic Velocity Models with Kinematic Wavefield Attributes

Author: Eric Duveneck

Publisher:

Published: 2004

Total Pages: 0

ISBN-13: 9783832506476

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For the transformation of recorded seismic reflection data into a depth image a seismic velocity model is required. In this thesis, a new tomographic method for the determination of such velocity models is presented which makes use of traveltime information in the form of kinematic wavefield attributes. These attributes are the coefficients of second-order traveltime approximations and can be extracted from the seismic data by means of coherence analyses, e.g., by applying the common-reflection-surface (CRS) stack method. Compared to conventional reflection tomography which requires picking of reflection events in the prestack data, the use of kinematic wavefield attributes leads to considerable practical advantages: the attributes required for the tomographic inversion are taken from the CRS stack results at a number of pick locations in the stacked section. For each considered data point, these attributes can be interpreted in terms of the second-order traveltimes of an emerging wavefront due to a hypothetical point source in the subsurface. During the inversion process, a model is found that minimizes the misfit between these data and the corresponding quantities modeled by dynamic ray tracing. In the thesis, the complete theory of the method, as well as practical applications are presented. Starting with an overview of the required aspects of ray theory and the CRS stack method, the general concept of the new tomographic inversion approach is developed. The method is then discussed in detail for the case of 1D, 2D, and 3D tomographic inversion and the entire process of deriving a velocity model is demonstrated on a synthetic and on a real 2D seismic dataset.

Active Seismic Tomography
Active Seismic Tomography

Author: Kalachand Sain

Publisher: John Wiley & Sons

Published: 2023-02-01

Total Pages: 148

ISBN-13: 1119594863

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Imaging complex regions or difficult terrains like the sub-volcanic sediments or thrust fold belt areas is crucial to understanding the earth's subsurface. Active Seismic Tomography: Theory and Applications describes current technologies for the study of seismic velocities and the elucidation of fine details of the subsurface. Key use cases include hydrocarbon reservoir characterization, identification of faults and channels, and stratigraphic and structural traps. Volume highlights include: Theory and development of seismic tomography Numerous examples of the interpretation and analysis of active source seismic data Relevance of tomography data for computational geophysicists This volume is a valuable resource for academics and professionals interested in using or developing integrated imaging approaches of the Earth's subsurface.

Fundamentals of Seismic Tomography
Fundamentals of Seismic Tomography

Author: Tien-when Lo

Publisher: SEG Books

Published: 1994

Total Pages: 187

ISBN-13: 1560800283

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This tutorial serves as a practical guide on seismic tomography for an audience familiar with basic seismology concepts and calculus. The intent is to provide the reader with a fundamental understanding of both seismic-ray tomography and seismic-diffraction tomography. Case studies illustrate processing methodology, basic interpretation techniques, and pitfalls. This presentation assists the reader in gaining a greater understanding of and appreciation for seismic-tomography articles found in the literature.