| Description |
1 online resource (xiii, 290 pages) : illustrations |
| Series |
Methods in geochemistry and geophysics, 0076-6895 ; 35 |
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Methods in geochemistry and geophysics ; 35. 0076-6895
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| Contents |
Front Cover; Three-Dimensional Electromagaetics; Copyright Page; CONTENTS; Preface; Part I: 3-D EM Modeling; CHAPTER 1. AN INTEGRAL EQUATION SOLUTION TO THE GEOPHYSICAL ELECTROMAGNETIC FORWARD-MODELLING PROBLEM; 1. Introduction; 2. The Integral Equation; 3. Numerical Solution -- Galerkin Approach; 4. Edge Element Basis Vectors; 5. The Green's Functions -- Part I; 6. Evaluation of the Integrals; 7. The Green's Functions -- Part II; 8. Examples; 9. Computational Efficiency; 10. Conclusions; References; CHAPTER 2. COMPRESSION IN 3-D INTEGRAL EQUATION MODELING; 1. Introduction |
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2. Forward Modeling with 3-D Integral Equations3. Compression Matrix; 4. Compression in Three Dimensions; 5. Compression as Preconditioner to the Integral Equation; 6. The ILU Preconditioned Conjugate Gradient Method; 7. Modeling Examples; 8. Conclusions; References; CHAPTER 3. MODELLING ELECTROMAGNETIC FIELDS IN A 3D SPHERICAL EARTH USING A FAST INTEGRAL EQUATION APPROACH; 1. Introduction; 2. Governing Equations; 3. Solution Verification; 4. Concluding Remarks; Appendix A. Dyadic Green's functions of radially symmetric section; References |
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CHAPTER 4. MODELLING INDUCTION LOG RESPONSES IN 3D GEOMETRIES USING A FAST INTEGRAL EQUATION APPROACH1. Introduction; 2. Theory; 3. Computational Load; 4. Numerical Examples; 5. Concluding Remarks; References; CHAPTER 5. NONLINEAR APPROXIMATIONS FOR ELECTROMAGNETIC SCATTERING FROM ELECTRICAL AND MAGNETIC INHOMOGENEITIES; 1. Introduction; 2. Integral Equation Formulation; 3. Born Approximation; 4. Localized Approximation; 5. Quasi-Linear Approximation; 6. Quasi-Analytical Approximation; 7. Numerical Results and Validation; 8. Conclusions; Appendix A. Quasi-Analytical One-Dimensional Solution |
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4. Numerical Results5. Conclusions; Appendix A. The Lanczos Algorithm for Skew Symmetric Matrices; References; Part II: 3-D EM Inversion; CHAPTER 8. THREE-DIMENSIONAL MAGNETOTELLURIC MODELING AND INVERSION: APPLICATION TO SUB-SALT IMAGING; 1. Introduction; 2. The 3D MT Forward Problem; 3. The 3D MT Inverse Problem; 4. Marine MT Resolution Study; 5. Conclusions; Appendix A; References; CHAPTER 9. 2-D INVERSION OF FREQUENCY-DOMAIN EM DATA CAUSED BY A 3-D SOURCE; 1. Introduction; 2. Inversion Theory; 3. Synthetic Data Example; 4. Conclusions |
| Summary |
"3-D modeling and inversion is a reality, and not an illusion." This is the clear conclusion of the <IT>Second International Symposium on Three-Dimensional Electromagnetics</IT> held at the University of Utah in 1999. Containing papers submitted by 36 authors, this volume, by the sheer number of works, their diversity, and the truly international character of the efforts attests to the vigor with which the problems of the field are pursued today. The papers in this book are grouped in three parts: 3-D EM modeling; 3-D EM inversion; and 3-D EM in practice. They cover a wide range of topics in forward modeling and inversion based on new fast approximate approaches and new efficient solutions by integral equation, finite difference and finite elements techniques. If the 1980s were the decade of rapid development in 3D seismics, the 1990s became the decade of growing interest of practical geophysicists in 3D EM modeling and inversion methods. The contributions contained in this volume represent a snapshot of today's state-of-the-art in three-dimensional electromagnetics |
| Bibliography |
Includes bibliographical references and indexes |
| Notes |
English |
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Print version record |
| Subject |
Magnetic prospecting -- Congresses
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TECHNOLOGY & ENGINEERING -- Mining.
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Magnetic prospecting
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| Genre/Form |
proceedings (reports)
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Conference papers and proceedings
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Conference papers and proceedings.
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Actes de congrès.
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| Form |
Electronic book
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| Author |
Zhdanov, Michael S
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Wannamaker, P. E. (Philip E.)
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| ISBN |
044450429X |
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9780444504296 |
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9780080542997 |
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0080542999 |
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1281027324 |
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9781281027320 |
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9786611027322 |
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6611027327 |
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