三维观测系统优化设计的双聚焦方法
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摘要
双聚焦法是一种面向特定勘探目标的三维观测系统优化设计新方法 ,它可以定量预测地震成像的空间分辨率、振幅精度和 AVP特性。常规的 CMP面元属性分析法是宏观的、全局性的 ,它强调获得最佳的水平叠加效果 ;而双聚焦特性分析法是面向指定目标的、局部性的 ,它强调获得最佳的偏移成像精度。因此 ,将两种方法结合在一起 ,相辅相成 ,提高观测系统优化设计的效果。由于不同介质模型的双聚焦计算方法差异较大 ,因此本课题研究分三步进行 ,即均匀介质算法、层状介质算法、复杂介质算法。本文完成了第一步均匀介质的双聚焦算法研究和软件研制 ,目前可作为三维观测系统优化设计中的补充。
The double focusing method is a new method for special-target-oriented 3- D geometry-optimized design,which can quantitatively predict the spatial resolu tion, the precision of amplitude and the AVP character of seismic imaging.The or dinary analysis of CMP bin attribution is macro and overall,which emphasizes on obtaining the optimal horizontal stacking effects;but the analysis of double fo cusing character is special target-oriented and regional,which emphasizes on o btaining the optimal precision of migrated imaging.Therefore,combination of the two methods can complement each other and improve the effects of geometry-o ptimized design.Because of different media model having big difference in doubl e focusing computation,the study of the task needs to be carried out in three steps:algorithm in homogeneous media,algorithm in layered media and algorith m in complex media. The paper finished the first step,that is the study of do uble focusing algorithm in homogeneous media and the development of correspondin g software,which is as a supplement of 3-D geometry-optimized design as a supp lementary method.
The double focusing method is a new method for special-target-oriented 3- D geometry-optimized design,which can quantitatively predict the spatial resolu tion, the precision of amplitude and the AVP character of seismic imaging.The or dinary analysis of CMP bin attribution is macro and overall,which emphasizes on obtaining the optimal horizontal stacking effects;but the analysis of double fo cusing character is special target-oriented and regional,which emphasizes on o btaining the optimal precision of migrated imaging.Therefore,combination of the two methods can complement each other and improve the effects of geometry-o ptimized design.Because of different media model having big difference in doubl e focusing computation,the study of the task needs to be carried out in three steps:algorithm in homogeneous media,algorithm in layered media and algorith m in complex media. The paper finished the first step,that is the study of do uble focusing algorithm in homogeneous media and the development of correspondin g software,which is as a supplement of 3-D geometry-optimized design as a supp lementary method.
引文
[1] A J别尔克豪特著,马在田等译.地震偏移——波场外推法声波成像(第五章,第六章).北京:石油工业出版社,1983
[2] BerkhoutA J.Pushing the limits of seism ic imaging,PartI:Prestack m igration in terms of double dynamicfocusing.Geophysics,1997,62(3):937～954
[3] BerkhoutA JandOngkiechongL .Analysis of seismicacquisition geometries by focal beams.ExpandedAb-stracts of68thSEG Mtg,1998
[4] VolkerA W E andBlaequiereG.Analysis of3D seis-mic acquisition geom etries by focal beams.ExpandedAbstracts of69thSEG Mtg,1999
[5] VolkerA W E etc.Analysis and optim ization of3Dseism ic acquisition geom etries by focal beam s.Ex-pandedAbstracts of70 thSEG Mtg,2000
[6] VolkerA W E etc.Acquisition design for optimumamplitude accuracy.ExpandedAbstractsof71stSEGMtg,2001
[7] AndreasCordsen等著,俞寿朋等译.陆上三维地震勘探的设计与施工.石油地球物理勘探局,1996
[8] 渥·伊尔马滋著,黄绪德等译.地震数据处理.北京:石油工业出版社,1994,230～234
[9] R E谢里夫等编.勘探地震学(下册).北京:石油工业出版社,1999,410～412
[10] 何樵登主编.地震勘探原理和方法.北京:地质出版社,1986,286
[11] 马在田.地震偏移剖面的假频、频散和横向分辨力.石油地球物理勘探,1982,17(4):16～29
[12] JingChen等著,董桥梁等译.偏移成像的分辨率极限.石油物探译丛,2000,23(3):28～37
[2] BerkhoutA J.Pushing the limits of seism ic imaging,PartI:Prestack m igration in terms of double dynamicfocusing.Geophysics,1997,62(3):937～954
[3] BerkhoutA JandOngkiechongL .Analysis of seismicacquisition geometries by focal beams.ExpandedAb-stracts of68thSEG Mtg,1998
[4] VolkerA W E andBlaequiereG.Analysis of3D seis-mic acquisition geom etries by focal beams.ExpandedAbstracts of69thSEG Mtg,1999
[5] VolkerA W E etc.Analysis and optim ization of3Dseism ic acquisition geom etries by focal beam s.Ex-pandedAbstracts of70 thSEG Mtg,2000
[6] VolkerA W E etc.Acquisition design for optimumamplitude accuracy.ExpandedAbstractsof71stSEGMtg,2001
[7] AndreasCordsen等著,俞寿朋等译.陆上三维地震勘探的设计与施工.石油地球物理勘探局,1996
[8] 渥·伊尔马滋著,黄绪德等译.地震数据处理.北京:石油工业出版社,1994,230～234
[9] R E谢里夫等编.勘探地震学(下册).北京:石油工业出版社,1999,410～412
[10] 何樵登主编.地震勘探原理和方法.北京:地质出版社,1986,286
[11] 马在田.地震偏移剖面的假频、频散和横向分辨力.石油地球物理勘探,1982,17(4):16～29
[12] JingChen等著,董桥梁等译.偏移成像的分辨率极限.石油物探译丛,2000,23(3):28～37
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