基于地震照明、面向勘探目标的三维观测系统优化设计
|
摘要
基于水平层状介质假设的常规三维地震勘探观测系统设计方法难以适应复杂构造区。本文利用地震照明技术,参考前人对二维问题的研究成果,发展了面向勘探目标成像的三维地震勘探观测系统优化设计方法。该方法利用三维单程傅里叶有限差分波场传播算子将勘探目的层的平面源延拓到地表,通过分析从目的层延拓到地表的地震照明能量分布,确定面向勘探目标的最佳激发范围。利用该方法可明显提高照明阴影区的照明强度,进而改善地下阴影区的成像质量。基于三维SEG-EAGE盐丘模型的地震照明与偏移成像试验结果,验证了本文面向勘探目标的三维地震观测系统优化设计方法的有效性与正确性。
Conventional methods of 3D seismic geometry design are based on the assumption of horizontal subsurface reflectors,which is not suitable for complex structure.Based on the previous research on two-dimensional problem,this paper develops a 3D target-oriented optimal geometry design method using the seismic illumination.This method uses the one-way Fourier finite-difference wave propagator to extrapolate plane wave sources from the target layer to the surface.By analyzing the wave energy distribution at the surface extrapolated from the target layer,the optimal shot positions for the target best illuminated can be determined.And finally,the imaging quality of the target or the shadow areas can be improved.In the numerical tests,seismic illumination and migration results based on the 3D SEG-EAGE salt model suggest that this 3D optimal geometry design method is effective and available.
Conventional methods of 3D seismic geometry design are based on the assumption of horizontal subsurface reflectors,which is not suitable for complex structure.Based on the previous research on two-dimensional problem,this paper develops a 3D target-oriented optimal geometry design method using the seismic illumination.This method uses the one-way Fourier finite-difference wave propagator to extrapolate plane wave sources from the target layer to the surface.By analyzing the wave energy distribution at the surface extrapolated from the target layer,the optimal shot positions for the target best illuminated can be determined.And finally,the imaging quality of the target or the shadow areas can be improved.In the numerical tests,seismic illumination and migration results based on the 3D SEG-EAGE salt model suggest that this 3D optimal geometry design method is effective and available.
引文
[1]董良国,吴晓峰,唐海忠等.逆掩推覆构造的地震波照明与观测系统设计.石油物探,2006,45(1):40～47Dong Liang-guo,Wu Xiao-feng,Tang Hai-zhong.Theseismic illumination and seismic survey design for theover ridden structure.GPP,2006,45(1):40～47
[2]周星合,尹成.基于复杂地质目标的地震波照明度模拟.西部探矿工程,2006,B06:207～209Zhou Xing-he,Yin Cheng.The si mulation of seismicwave illumination for the complex geologic targets.West-China Exploration Engneering,2006,B06:207～209.
[3]陈生昌,马在田,吴如山.波动方程双程地下方向照明分析.同济大学学报(自然科学版),2007,35(5):681～684Chen Sheng-chang,Ma Zai-tian,Wu Ru-shan.Two-way subsurface directional illumination analysis bywave equation.Journal of Tongji University(Na-ture Science),2007,35(5):681～684
[4]Berkhout AJ.Areal shot-record technology.Expl,1992,1(3):251～264
[5]Rietveld W E A,Berkhout A J.Prestack depth mi-gration by means of controlled illumination.Geo-physics,1994,59(5):801～809
[6]Wu Ru-shan,Chen L,Wang Y.Prestack migrationi maging using synthetic beam-sources and plane-sources.Studia Geophysica et Geodetica,2002,46:651～666
[7]Wu R S,Chen L,Wang Y.Synthetic beamlet-sourcesand plane-sources for prestack beamlet migration.SEG Technical Progrom Expanded Abstracts,2002,21:1336～1339
[8]Chen L,Wu Ru-shan.Target oriented prestack beam-let migration using Gabor-daubechies frames.SEGTechnical Progrom Expanded Abstracts,2002,21:1356～1359
[9]冯伟,王华忠,吴如山等.面向目标控制照明的合成波源偏移.石油物探,2004,43(3):223～228Feng Wei,Wang Hua-zhong,Wu Ru-shan et al.Themigration of synthetic waves for target-oriented con-trolled illumination.GPP,2004,43(3):223～228
[10]冯伟,吴如山,王华忠.面向目标的小束源照明和成像.地球物理学进展,2006,21(3):802～808Feng Wei,Wu Ru-shan,Wang Hua-zhong et al.Tar-get-oriented beam source illumination and i maging.Progress in Geophysics,2006,21(3):802～808
[11]Chen Xiu-mei,Wang Hua-zhong,Cheng Jiu-bing etal.Prestack depth migration by surface controlledil-lumination in a target oriented way.SEG TechnicalProgrom Expanded Abstracts,2002,21:306～311
[12]Chen Xiu-mei,Wang Hua-zhong,Cheng Jiu-bing etal.Prestack depth migration by surface rotation con-trolled illumination.Chinese J Geophysics,2004,47(1):306～311
[13]陈秀梅,王华忠,马在田.多地质目标地表控制照明叠前深度偏移.石油地球物理勘探,2003,38(5):507～511Chen Xiu-mei,Wang Hua-zhong,Ma Zai-tian.Pres-tack depth migration by surface-controlled illumina-tion of multi-geologic targets.OGP,2003,38(5):507～511
[14]赵殿栋,郭建,王咸彬等.基于模型面向目标的观测系统优化设计技术.中国西部石油地质,2006,2(2):119～122Zhao Dian-dong,Guo Jian,Wang Xian-bin et al.Opti-mal design of model-based and object-oriented obser-vation system.West China Petroleum Geosciences,2006,2(2):119～122
[15]Liu Shou-wei,Geng Jian-hua,Feng Wei.Controlledillumination and seismic acquisition geometry for tar-get-oriented i maging.Applied Geophysics,2005,2(4):230～234
[16]吕公河,尹成,周星合等.基于采集目标的地震照明度的精确模拟.石油地球物理勘探,2006,41(3):258～261Lv Gong-he,Yin Cheng,Zhou Xing-he.Precious si m-ulation of seismic illumination based on acquired tar-gets.OGP,2006,41(3):258～261
[17]李万万.基于波动方程正演的地震观测系统设计.石油地球物理勘探,2008,43(2):134～141Li Wan-wan.Design of seismic geometry based onwave equation forward si mulation.OGP,2008,43(2):134～141
[18]Xie Xiao-bi,Jin Sheng-wen,Wu Ru-shan.Three di-mensional illumination analysis using wave equationbased propagator.SEG Technical Progrom Ex-panded Abstracts,2003,22:989～992
[19]Luo Ming-qiu,Cao Jun,Xie Xiao-bi et al.Comparisonof illumination analyses using one-way and full-wavepropagators.SEG Technical Progrom ExpandedAbstracts,2004,23:67～70
[2]周星合,尹成.基于复杂地质目标的地震波照明度模拟.西部探矿工程,2006,B06:207～209Zhou Xing-he,Yin Cheng.The si mulation of seismicwave illumination for the complex geologic targets.West-China Exploration Engneering,2006,B06:207～209.
[3]陈生昌,马在田,吴如山.波动方程双程地下方向照明分析.同济大学学报(自然科学版),2007,35(5):681～684Chen Sheng-chang,Ma Zai-tian,Wu Ru-shan.Two-way subsurface directional illumination analysis bywave equation.Journal of Tongji University(Na-ture Science),2007,35(5):681～684
[4]Berkhout AJ.Areal shot-record technology.Expl,1992,1(3):251～264
[5]Rietveld W E A,Berkhout A J.Prestack depth mi-gration by means of controlled illumination.Geo-physics,1994,59(5):801～809
[6]Wu Ru-shan,Chen L,Wang Y.Prestack migrationi maging using synthetic beam-sources and plane-sources.Studia Geophysica et Geodetica,2002,46:651～666
[7]Wu R S,Chen L,Wang Y.Synthetic beamlet-sourcesand plane-sources for prestack beamlet migration.SEG Technical Progrom Expanded Abstracts,2002,21:1336～1339
[8]Chen L,Wu Ru-shan.Target oriented prestack beam-let migration using Gabor-daubechies frames.SEGTechnical Progrom Expanded Abstracts,2002,21:1356～1359
[9]冯伟,王华忠,吴如山等.面向目标控制照明的合成波源偏移.石油物探,2004,43(3):223～228Feng Wei,Wang Hua-zhong,Wu Ru-shan et al.Themigration of synthetic waves for target-oriented con-trolled illumination.GPP,2004,43(3):223～228
[10]冯伟,吴如山,王华忠.面向目标的小束源照明和成像.地球物理学进展,2006,21(3):802～808Feng Wei,Wu Ru-shan,Wang Hua-zhong et al.Tar-get-oriented beam source illumination and i maging.Progress in Geophysics,2006,21(3):802～808
[11]Chen Xiu-mei,Wang Hua-zhong,Cheng Jiu-bing etal.Prestack depth migration by surface controlledil-lumination in a target oriented way.SEG TechnicalProgrom Expanded Abstracts,2002,21:306～311
[12]Chen Xiu-mei,Wang Hua-zhong,Cheng Jiu-bing etal.Prestack depth migration by surface rotation con-trolled illumination.Chinese J Geophysics,2004,47(1):306～311
[13]陈秀梅,王华忠,马在田.多地质目标地表控制照明叠前深度偏移.石油地球物理勘探,2003,38(5):507～511Chen Xiu-mei,Wang Hua-zhong,Ma Zai-tian.Pres-tack depth migration by surface-controlled illumina-tion of multi-geologic targets.OGP,2003,38(5):507～511
[14]赵殿栋,郭建,王咸彬等.基于模型面向目标的观测系统优化设计技术.中国西部石油地质,2006,2(2):119～122Zhao Dian-dong,Guo Jian,Wang Xian-bin et al.Opti-mal design of model-based and object-oriented obser-vation system.West China Petroleum Geosciences,2006,2(2):119～122
[15]Liu Shou-wei,Geng Jian-hua,Feng Wei.Controlledillumination and seismic acquisition geometry for tar-get-oriented i maging.Applied Geophysics,2005,2(4):230～234
[16]吕公河,尹成,周星合等.基于采集目标的地震照明度的精确模拟.石油地球物理勘探,2006,41(3):258～261Lv Gong-he,Yin Cheng,Zhou Xing-he.Precious si m-ulation of seismic illumination based on acquired tar-gets.OGP,2006,41(3):258～261
[17]李万万.基于波动方程正演的地震观测系统设计.石油地球物理勘探,2008,43(2):134～141Li Wan-wan.Design of seismic geometry based onwave equation forward si mulation.OGP,2008,43(2):134～141
[18]Xie Xiao-bi,Jin Sheng-wen,Wu Ru-shan.Three di-mensional illumination analysis using wave equationbased propagator.SEG Technical Progrom Ex-panded Abstracts,2003,22:989～992
[19]Luo Ming-qiu,Cao Jun,Xie Xiao-bi et al.Comparisonof illumination analyses using one-way and full-wavepropagators.SEG Technical Progrom ExpandedAbstracts,2004,23:67～70
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