叠前时间偏移方法综述
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摘要
对叠前时间偏移的基本概念、实现方法进行了分类和阐述。从实现目标来说,叠前时间偏移方法主要分为两类,即用于准确构造成像的叠前时间偏移和振幅保持叠前时间偏移。每一类方法都有两种实现方式:Kirch-hoff型和波动方程型。对这些叠前时间偏移实现方法的原理和特点进行了比较详细的论述。同时指出,叠前时间偏移和深度偏移的联合应用,能够起到优势互补的作用,是叠前时间偏移在实际应用中的发展方向;而叠前配套技术的研究和更好适应不同观测系统的全三维、高精度、振幅保待叠前时间偏移方法,是地震叠前时间成像研究领域的发展方向。
This paper reviewed the concepts of prestack time migrat on and its realizations. Prestack time migrationcan be roughly divided into two: structure-oriented and amplitude-preserved. For each prestack time migration,two realizations: Kirchhoff migration or wave equation migration, can be implemented. We discussed in detail theprinciples and advantages of each realizations, and pointed out that joint application of prestack time migrationand depth migration was a trend in practice because they in essence are complementary. The study of prestacksupport tools and prestack time migration of full 3-D, high-resolution, and amplitude-preserved that is applicablefor different layouts are the future direction of prestack time mig: ation.
This paper reviewed the concepts of prestack time migrat on and its realizations. Prestack time migrationcan be roughly divided into two: structure-oriented and amplitude-preserved. For each prestack time migration,two realizations: Kirchhoff migration or wave equation migration, can be implemented. We discussed in detail theprinciples and advantages of each realizations, and pointed out that joint application of prestack time migrationand depth migration was a trend in practice because they in essence are complementary. The study of prestacksupport tools and prestack time migration of full 3-D, high-resolution, and amplitude-preserved that is applicablefor different layouts are the future direction of prestack time mig: ation.
引文
1 Yilmaz O,Claerbout J F.Prestack partial migration[J].Geophysics, 1980, 45(6) : 1753～1779
2 马在田.论反射地震偏移成像[J].勘探地球物理进展,2002,25(3) :1～5
3 王棣,王华忠,马在田,等.频率波数域共偏移距叠前时间偏移方法[J].石油物探,2004,43(1) :8～10
4 Schneider W. Integral formulation for migration[J].Geophysics, 1978, 43(1) : 49～76
5 Bancroft J C, Geiger H D,Margrave G F. The equivalent offset method of prestack time migration[J].Geophysics,1998,63(6) : 2041～2053
6 Brown R. Estimation of AVO in the presence of noise using prestack migration[J].Expanded Abstracts of 62~(nd) Annual Internat SEG Mtg, 1992, 885～888
7 Beydoun W, Hanitzsch C,Jin S.AVO migration and inversion:Are they commutable[J].Expanded Abstracts of 64~(th) Annual Internat SEG Mtg, 1994, 952～955
8 Gray S. True-amplitude migration[J].The LeadingEdge,1999, 18(8) : 917
9 Gray S H. True-amplitude seismic migration:A comparison of three approaches[J].Geophysics,1997,62(3) :929～936
10 Mosher C C, Keho T H, Weglein A B, et al. The impact of migration on AVO[J].Geophysics, 1996, 61(6) :1603～1615
11 孙建国.Kirchhoff型真振幅偏移与反偏移[J].勘探地球物理进展,2002,25(6) :1～5
12 Zhang Y, Gray S, Young J. Exact and approximate weights for Kirchhoff migration[J].Expanded Abstracts of 70~(th) Annual Internat SEG Mtg, 2000, 1036～1039
13 Winbow G, Schneider W.Weights for 3-D controlled amplitude prestack time migration[J].Expanded Abstracts of 69~(th) Annual Internat SEG Mtg, 1999, 1110～1113
14 Geiger H. Amplitude-preserving weights for Kirchhoff prestack time migration [J]. Expanded Abstracts of 72~(nd) Annual Internat SEG Mtg, 2002, 1220～1223
15 Pestana R, Stoffa P, Santos J R. Plane wave prestack time migration[J].Expanded Abstracts of 70~(th) Annual Internat SEG Mtg, 2000, 810～813
16 Ekren B O, Ursin B True-amplitude frequency-wave-number constant-offset migration [J].Geophysics,1999,64(3) : 915～924
2 马在田.论反射地震偏移成像[J].勘探地球物理进展,2002,25(3) :1～5
3 王棣,王华忠,马在田,等.频率波数域共偏移距叠前时间偏移方法[J].石油物探,2004,43(1) :8～10
4 Schneider W. Integral formulation for migration[J].Geophysics, 1978, 43(1) : 49～76
5 Bancroft J C, Geiger H D,Margrave G F. The equivalent offset method of prestack time migration[J].Geophysics,1998,63(6) : 2041～2053
6 Brown R. Estimation of AVO in the presence of noise using prestack migration[J].Expanded Abstracts of 62~(nd) Annual Internat SEG Mtg, 1992, 885～888
7 Beydoun W, Hanitzsch C,Jin S.AVO migration and inversion:Are they commutable[J].Expanded Abstracts of 64~(th) Annual Internat SEG Mtg, 1994, 952～955
8 Gray S. True-amplitude migration[J].The LeadingEdge,1999, 18(8) : 917
9 Gray S H. True-amplitude seismic migration:A comparison of three approaches[J].Geophysics,1997,62(3) :929～936
10 Mosher C C, Keho T H, Weglein A B, et al. The impact of migration on AVO[J].Geophysics, 1996, 61(6) :1603～1615
11 孙建国.Kirchhoff型真振幅偏移与反偏移[J].勘探地球物理进展,2002,25(6) :1～5
12 Zhang Y, Gray S, Young J. Exact and approximate weights for Kirchhoff migration[J].Expanded Abstracts of 70~(th) Annual Internat SEG Mtg, 2000, 1036～1039
13 Winbow G, Schneider W.Weights for 3-D controlled amplitude prestack time migration[J].Expanded Abstracts of 69~(th) Annual Internat SEG Mtg, 1999, 1110～1113
14 Geiger H. Amplitude-preserving weights for Kirchhoff prestack time migration [J]. Expanded Abstracts of 72~(nd) Annual Internat SEG Mtg, 2002, 1220～1223
15 Pestana R, Stoffa P, Santos J R. Plane wave prestack time migration[J].Expanded Abstracts of 70~(th) Annual Internat SEG Mtg, 2000, 810～813
16 Ekren B O, Ursin B True-amplitude frequency-wave-number constant-offset migration [J].Geophysics,1999,64(3) : 915～924
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