基于散射成像的多次波衰减
|
摘要
为解决地震数据处理中的多次波问题,研究了散射成像衰减多次波方法,分析了该方法的基本原理、实现步骤以及实际应用效果。散射成像方法主要是根据散射波的波场特征及散射理论,利用共散射点的等效偏移距道集对地下地质体进行偏移成像。基于共散射点道集(CSP)成像时,每炮利用了多道信息,而在CSP道集中,仅入射角等于反射角的少数道含有多次波,因此,散射成像具有衰减多次波的特性。实际应用表明,该方法在衰减多次波方面效果明显。
In order to attenuate multiples in seismic data processing, scattering imaging in attenuating multiples was studied.The prin- ciples,realizing methods and actual application results of the meth- od were analyzed.Scattering imaging is based on the wavefield characterisitics and scattering theory,utilizes the equivalent offset of common scattering point gathers to image the subsurface geolog- ic bodies.In the imaging based on CSP,every shot uses more in- formation.But in CSP gathers,multiples can be received when the incident angle is equal to the reflected angle.Thus,scattering ima- ging can attenuate multiples.Actual application shows that the method is effective in multiples attenuation.
In order to attenuate multiples in seismic data processing, scattering imaging in attenuating multiples was studied.The prin- ciples,realizing methods and actual application results of the meth- od were analyzed.Scattering imaging is based on the wavefield characterisitics and scattering theory,utilizes the equivalent offset of common scattering point gathers to image the subsurface geolog- ic bodies.In the imaging based on CSP,every shot uses more in- formation.But in CSP gathers,multiples can be received when the incident angle is equal to the reflected angle.Thus,scattering ima- ging can attenuate multiples.Actual application shows that the method is effective in multiples attenuation.
引文
1丁科，宋守根，谢忠球．逆散射理论的发展及应用前景[J]．地球物理学进展，2005，20(3)：661～666
2 Carvalho P M,Weglein A B,Stolt R H.Nonlinear in- verse scattering for multiple suppression:Application to real data,part[J].Expanded Abstracts of 62~(nd) Annual Internat SEG Mtg,1992,1093～1095
3 Weglein A B,Gasparotto F A,Carvalho P M,et al.An inverse scattering series method for attenuating multi- ple in seismic reflection data[J].Geophysics,1997,62 (6):1975～1989
4 Weglein A B.How can the inverse scattering method really predict and subtract all multiples from a multidi- mensional earth with absolutely no subsurface informa- tion[J].The Leading Edge,1999,18(1):132～136
5 Matson K H.The relationship between scattering the- ory and the primaries and multiples of reflection seis- mic data[J].Journal of Seismic Exploration,1996,5 (1):63～78
6 Matson K H,Weglein A B.Removalof elastic inter- face multiples from land and ocean-bottom data using inverse scattering[J].Expanded Abstracts of 66~(th) An- nual Internat SEG Mtg,1996,1526～1530
7 Matson K H.An inverses scattering series method for attenuating elastic multiples from multicomponent land ocean bottom seismic data[学位论文][D].West Mall Vancouver:The University of British Columbia,1997
8 Ikelle L T.Using even terms of the scattering series for deghosting and multiple attenuation of ocean-bot- tom cable data[J].Geophysics,1999,64(2):579～592
9尹军杰．地震散射波场特征的数值模拟研究[学位论文][D]．北京：中国地质大学(北京)，2005
10尹军杰，刘学伟，黄雪继等．基于散射成像数值模拟的地震采集参数论证[J]．石油物探，2005，44(1)：58～64
11尹军杰，刘学伟，李文慧．地震波散射理论及应用研究综述[J]．地球物理学进展，2005，20(1)：123～134
12 Bancroft J C,Geiger H D.Equivalent offset CRP gath- er[J].Expanded Abstracts of 64~(th)Annual Internat SEG Mtg,1994,672～675
13 Bancroft J C,Geiger H D,Foltinek D,et al.Prestack migration by equivalent offsets and common scatter point(CSP)gathers[J].57~(th)Mtg European Associa- tion Of Geophysical,Extended Abstracts,1995,124
14 Bancroft J C.Natural antialiasing in equivalent offset prestack migration[J].Expanded Abstracts of 66~(th) Annual Internat SEG Mtg,1996,1465～1466
15 Ottolini R A.Migration of reflection seismic data in angle midpoint coordinates[学位论文][D].New York:Stanford University,1982
16 Claerbout J F.Imaging the earth's interior[M].Bos- ton:Blackwell Scientific Publications,1985.412
17 Fowler J F.A comparative overviewof prestack time migration methods[J].Expanded Abstracts of 67~(th) Annual Internat SEG Mtg,1997,1571～1574
18王伟．基于等效偏移距方法叠前时间偏移的研究[学位论文][D]．北京：中国地质大学(北京)，2005
2 Carvalho P M,Weglein A B,Stolt R H.Nonlinear in- verse scattering for multiple suppression:Application to real data,part[J].Expanded Abstracts of 62~(nd) Annual Internat SEG Mtg,1992,1093～1095
3 Weglein A B,Gasparotto F A,Carvalho P M,et al.An inverse scattering series method for attenuating multi- ple in seismic reflection data[J].Geophysics,1997,62 (6):1975～1989
4 Weglein A B.How can the inverse scattering method really predict and subtract all multiples from a multidi- mensional earth with absolutely no subsurface informa- tion[J].The Leading Edge,1999,18(1):132～136
5 Matson K H.The relationship between scattering the- ory and the primaries and multiples of reflection seis- mic data[J].Journal of Seismic Exploration,1996,5 (1):63～78
6 Matson K H,Weglein A B.Removalof elastic inter- face multiples from land and ocean-bottom data using inverse scattering[J].Expanded Abstracts of 66~(th) An- nual Internat SEG Mtg,1996,1526～1530
7 Matson K H.An inverses scattering series method for attenuating elastic multiples from multicomponent land ocean bottom seismic data[学位论文][D].West Mall Vancouver:The University of British Columbia,1997
8 Ikelle L T.Using even terms of the scattering series for deghosting and multiple attenuation of ocean-bot- tom cable data[J].Geophysics,1999,64(2):579～592
9尹军杰．地震散射波场特征的数值模拟研究[学位论文][D]．北京：中国地质大学(北京)，2005
10尹军杰，刘学伟，黄雪继等．基于散射成像数值模拟的地震采集参数论证[J]．石油物探，2005，44(1)：58～64
11尹军杰，刘学伟，李文慧．地震波散射理论及应用研究综述[J]．地球物理学进展，2005，20(1)：123～134
12 Bancroft J C,Geiger H D.Equivalent offset CRP gath- er[J].Expanded Abstracts of 64~(th)Annual Internat SEG Mtg,1994,672～675
13 Bancroft J C,Geiger H D,Foltinek D,et al.Prestack migration by equivalent offsets and common scatter point(CSP)gathers[J].57~(th)Mtg European Associa- tion Of Geophysical,Extended Abstracts,1995,124
14 Bancroft J C.Natural antialiasing in equivalent offset prestack migration[J].Expanded Abstracts of 66~(th) Annual Internat SEG Mtg,1996,1465～1466
15 Ottolini R A.Migration of reflection seismic data in angle midpoint coordinates[学位论文][D].New York:Stanford University,1982
16 Claerbout J F.Imaging the earth's interior[M].Bos- ton:Blackwell Scientific Publications,1985.412
17 Fowler J F.A comparative overviewof prestack time migration methods[J].Expanded Abstracts of 67~(th) Annual Internat SEG Mtg,1997,1571～1574
18王伟．基于等效偏移距方法叠前时间偏移的研究[学位论文][D]．北京：中国地质大学(北京)，2005
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心