Geophysical Image Estimation By Example
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Geophysical Image Estimation By Example
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Author : Jon Claerbout
language : en
Publisher: Lulu.com
Release Date : 2014
Geophysical Image Estimation By Example written by Jon Claerbout and has been published by Lulu.com this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Technology & Engineering categories.
Illuminates geophysical and mathematical concepts with exemplar computer code and applications using acoustic, seismic, radar, astrophysical, and X-ray probe data to create images of tops and bottoms of lake and ocean, a volcano, petroleum prospects, and internals of breast and sun.
Imaging And Velocity Analysis By Target Oriented Wavefield Inversion
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Author : Yaxun Tang
language : en
Publisher: Stanford University
Release Date : 2011
Imaging And Velocity Analysis By Target Oriented Wavefield Inversion written by Yaxun Tang and has been published by Stanford University this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
This thesis develops a novel target-oriented inversion framework that uses wavefields as carriers of information to image both low-wavenumber component (a.k.a. background velocity) and high-wavenumber component (a.k.a. reflectivity) of the earth model in complex geological settings, such as subsalt regions. I address the problem of reflectivity imaging with target-oriented wavefield least-squares migration, and the problem of velocity estimation with target-oriented wavefield tomography. Reflectivity images of the subsurface are commonly produced by prestack depth migration. When the overburden is complex and the reflectors are unevenly or insufficiently illuminated, the migration operator alone is inadequate to provide an optimal image. I tackle the problem of distorted illumination in reflectivity imaging by wavefield least-squares migration. I formulate least-squares migration in the image domain and solve it in a target-oriented fashion. In the image-domain formulation, explicit computation of the Hessian operator (the resolution function that measures the illumination deficiency of the imaging system) is the most important and challenging step. I develop a novel method based on phase encoding to efficiently and accurately compute the target-oriented Hessian operator. The Hessian operator is then used to recover the reflectivity by iterative inverse filtering. I regularize the inversion with dip constraints, which naturally incorporate interpreted geological information into the inversion. Accurate imaging of the reflectivity also requires an accurate background velocity model. High-quality velocity model-building in complex geology requires wavefield-based velocity analysis to properly model band-limited wave phenomena. However, the high cost and lack of flexibility of target-oriented model-building prevent this method from being widely used in practice. I overcome the cost and flexibility issues of wavefield-based migration velocity analysis by developing target-oriented wavefield tomography. Target-oriented wavefield tomography is achieved by synthesizing a new data set specifically for velocity analysis. The new data set is generated based on an initial unfocused target image and by a novel application of generalized Born wavefield modeling, which correctly preserves velocity kinematics by modeling both zero and non-zero subsurface-offset-domain images. The new data set can be synthesized for a chosen target region with velocity inaccuracies. The reduced data size and computation domain, therefore, greatly improve the efficiency and flexibility of wavefield tomography, allowing fast and interpretation-driven interactive wavefield-based velocity analysis, where different geological scenarios or hypotheses can be tested in quasi-real time. The proposed target-oriented inversion framework successfully estimates subsalt velocities and recovers subsalt reflectivities from distorted illumination from 2-D synthetic and 3-D field data.
Mathematical Methods In Geophysical Imaging
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Author :
language : en
Publisher:
Release Date : 1998
Mathematical Methods In Geophysical Imaging written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Image processing categories.
Interpreting Subsurface Seismic Data
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Author : Rebecca Bell
language : en
Publisher: Elsevier
Release Date : 2022-05-27
Interpreting Subsurface Seismic Data written by Rebecca Bell and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-05-27 with Science categories.
Interpreting Subsurface Seismic Data presents recent advances in methodologies for seismic imaging and interpretation across multiple applications in geophysics including exploration, marine geology, and hazards. It provides foundational information for context, as well as focussing on recent advances and future challenges. It offers detailed methodologies for interpreting the increasingly vast quantity of data extracted from seismic volumes. Organized into three parts covering foundational context, case studies, and future considerations, Interpreting Subsurface Seismic Data offers a holistic view of seismic data interpretation to ensure understanding while also applying cutting-edge technologies. This view makes the book valuable to researchers and students in a variety of geoscience disciplines, including geophysics, hydrocarbon exploration, applied geology, and hazards. - Presents advanced seismic detection workflows utilized cutting-edge technologies - Integrates geophysics and geology for a variety of applications, using detailed examples - Provides an overview of recent advances in methodologies related to seismic imaging and interpretation
Land Seismic Case Studies For Near Surface Modeling And Subsurface Imaging
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Author : Öz Yilmaz
language : en
Publisher: SEG Books
Release Date : 2021-06-30
Land Seismic Case Studies For Near Surface Modeling And Subsurface Imaging written by Öz Yilmaz and has been published by SEG Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-06-30 with Science categories.
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
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Author : Biondo Biondi
language : en
Publisher: SEG Books
Release Date : 2006
3d Seismic Imaging written by Biondo Biondi and has been published by SEG Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Computers categories.
Accompanying CD-ROM includes PDF slides for teaching the material in the book and the C3-narrow-azimuth classic data set.
Introduction To Seismology
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Author : Peter M. Shearer
language : en
Publisher: Cambridge University Press
Release Date : 2019-05-30
Introduction To Seismology written by Peter M. Shearer and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-05-30 with Nature categories.
A concise and accessible introduction to seismic theory, focusing on the mathematical fundamentals of global seismology. Aimed at advanced undergraduate and graduate students, this new edition has been updated to include recent advances in the field as well as new examples, review questions and computer-based exercises in MATLAB®/Python.
Geophysics Today
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Author : Sergey Fomel
language : en
Publisher: SEG Books
Release Date : 2010
Geophysics Today written by Sergey Fomel and has been published by SEG Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Science categories.
Presents a collection of papers which appear in the September-October 2010 Geophysics special section, written by recognised experts in various areas of exploration geophysics, plus an additional group of papers drawn from Geophysics which address areas beyond those invited articles. The result is a snapshot of the state-of-the-art in the field.
Optimization And Regularization For Computational Inverse Problems And Applications
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Author : Yanfei Wang
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-06-29
Optimization And Regularization For Computational Inverse Problems And Applications written by Yanfei Wang and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-06-29 with Mathematics categories.
"Optimization and Regularization for Computational Inverse Problems and Applications" focuses on advances in inversion theory and recent developments with practical applications, particularly emphasizing the combination of optimization and regularization for solving inverse problems. This book covers both the methods, including standard regularization theory, Fejer processes for linear and nonlinear problems, the balancing principle, extrapolated regularization, nonstandard regularization, nonlinear gradient method, the nonmonotone gradient method, subspace method and Lie group method; and the practical applications, such as the reconstruction problem for inverse scattering, molecular spectra data processing, quantitative remote sensing inversion, seismic inversion using the Lie group method, and the gravitational lensing problem. Scientists, researchers and engineers, as well as graduate students engaged in applied mathematics, engineering, geophysics, medical science, image processing, remote sensing and atmospheric science will benefit from this book. Dr. Yanfei Wang is a Professor at the Institute of Geology and Geophysics, Chinese Academy of Sciences, China. Dr. Sc. Anatoly G. Yagola is a Professor and Assistant Dean of the Physical Faculty, Lomonosov Moscow State University, Russia. Dr. Changchun Yang is a Professor and Vice Director of the Institute of Geology and Geophysics, Chinese Academy of Sciences, China.
Geostatistics For Seismic Data Integration In Earth Models
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Author : Olivier Dubrule
language : en
Publisher: SEG Books
Release Date : 2003
Geostatistics For Seismic Data Integration In Earth Models written by Olivier Dubrule and has been published by SEG Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Science categories.
Geostatistics is used not only in reservoir characterization but also in velocity analysis, time-to-depth conversion, seismic inversion, uncertainty quantification, and data integration in earth models. This book includes covariance and the variogram, interpolation, heterogeneity modelling, uncertainty quantification, and geostatistical inversion.