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正版 瞬变电磁法拟地震偏移成像研究(英文版) 李貅,薛国强,殷
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Contents
1 Development and Prospect of Transient Electromagnetic Method 1
1.1 Overview on TEM Method 1
1.2 The Development Direction of TEM 4
1.3 Frontier Subject of TEM Pseudo-seismic Migrationand Imaging 8
1.3.1 TEM Imaging Based on Equivalent Time-Frequency Conversion 8
1.3.2 TEM Imaging Technology Based on the WaveField Conversion 10
1.3.3 Reverse Time Migration and Imaging Method 11
1.4 Research Progress of Pseudo-seismic Migrationand Imaging in TEM 13
References 14
2 Theory and Technology of Full-Zone Wave FieldTransformation 17
2.1 Theoretical Formula Construction 18
2.2 Ill-Posedness of Inverse Wave Field Transformation Analysis 19
2.3 Numerical Methods for Wave Field Transformation 20
2.4 Preconditioned Conjugate Gradient Regularization for InverseWave Field Transformation 26
2.5 Correlation Stacking Method for Extracting PseudoWave Field 31
2.6 Effectiveness Test of the Algorithm 33
References 37
3 Property of TEM Pseudo Wave Field 39
3.1 Two-Layer Model Analysis 39
3.1.1 Wave Field with Single Positive Peak 39
3.1.2 Wave Field with Single Negative Peak 44
3.2 Three-Layer Model Analysis 49
3.2.1 Q-Type Model with Double Positive Peaks 49
3.2.2 H-Type Model with Positive–Negative Peaks 52
3.2.3 K-Type Model with Negative–Positive Peaks 52
3.2.4 A-Type Model with Double Negative Peaks 57
3.3 Wave Field Characteristics of Time-Domain EM Responseswith Noise 57
4 Synthetic Aperture Algorithms and Compressionof Wavelet Width 75
4.1 Imaging Method Based on Synthetic Aperture 75
4.2 Compression of Wavelet Width 77
4.2.1 The Phenomenon of Waveform Dispersion 77
4.2.2 The Reason of Waveform Dispersion 78
4.2.3 Waveform Dispersion Compression Basedon Deconvolution 79
4.2.4 Model Calculations 82Reference 85
5 Surface Continuation and Imaging of TEM Basedon Pseudo Wave Equations 87
5.1 Establishment of Kirchhoff Diffraction Integral 87
5.2 Migration by Kirchhoff Integration (Surface Continuation) 93
5.3 Boundary Element Method for Wave Field Continuation 95
5.3.1 Discretization of Kirchhoff Integration 95
5.3.2 Analysis on Elements 95
5.3.3 Total Matrix 97
5.3.4 Integration Over Elements 98
6 Velocity Analysis of TEM Pseudo Wave Field 105
6.1 Velocity Modelling Based on Equivalent Conductive PlateMethod 105
6.1.1 Basic Theory of Equivalent Conductive Plate Method 106
6.1.2 Approximate Calculation of TEM Fieldat the Surface of a Horizontally Layered Earth 108
6.1.3 Optimized Extraction of Parameter m 110
6.2 Velocity Model for Single Observation Point 112
6.3 Continuous Velocity Analysis 114
6.3.1 Weighted Interpolation Based on Global Distance 114
6.3.2 Localized Linear Interpolation 115
7 Imaging of Theoretical Model and Field Examples 125
7.1 Model Calculations 125
7.1.1 Layered Model 125
7.1.2 Three-Dimensional Model 126
7.2 Examples with Field Data 131
7.2.1 Advanced Detection of Tunnel 131
7.2.2 Detection of Goaf of Coal Mine 135
评论
本书讲述瞬变电磁拟地震成像方法的基本理论,其中包括:瞬变电磁场的虚拟波场变换原理、虚拟波场的特性分析、虚拟波场子波宽度压缩及修饰性处理、合成孔径处理方法、虚拟波动方程三维曲面延拓成像、虚拟波场速度分析及理论模型计算和应用实例。本书的特点是着眼于理论与实际的结合,全面介绍了瞬变电磁拟地震解释的*新进展。书中包括了作者多年的研究成果,可供地球物理专业的研究人员、高等学校教师和研究生参考。
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