整体波场延拓法基准面校正
|
摘要
提出了一种新的近地表问题解决方法——整体波场延拓法基准面校正(WEDD)。借助地震理论中的互换原理和观测面沉降概念,在基准面校正过程中将炮点和检波点的处理统一起来,并利用炮点-全偏移距域双平方根算子实现波场的单域整体延拓,最后提取目标深度的波场值完成参考面的重新定义。模型试算结果表明了WEDD方法的有效性。
In this paper,a new solution to the near-surface problem-the datum correcting method based on the global wavefield continuation is presented.According to the mutual exchange principle of the earthquake theory and the observed surface settlement concept,the treatment of shotpoint and geophone station will be combined during the datum correcting process.The global continuation of the single wavefield will be achieved by the double square root operator in shotpoint-offset domain.At last,the wavefield vale of the target depth is extracted and the reference surface is redefined.The trial calculated results show that the datum correction based on global wavefield continuation is effective.
In this paper,a new solution to the near-surface problem-the datum correcting method based on the global wavefield continuation is presented.According to the mutual exchange principle of the earthquake theory and the observed surface settlement concept,the treatment of shotpoint and geophone station will be combined during the datum correcting process.The global continuation of the single wavefield will be achieved by the double square root operator in shotpoint-offset domain.At last,the wavefield vale of the target depth is extracted and the reference surface is redefined.The trial calculated results show that the datum correction based on global wavefield continuation is effective.
引文
[1]Pralica N.A revisit of tomostatics by deformable layer tomography[D].MS thesis at University of Houston,2005.
[2]Berryhill J R.Wave-equation datuming[J].Geophysics,1979,44(8):1329-1344.
[3]Cui X F,Li H B,Hu Y,et al.Wavefield continuation da-tuming using a near surface model[J].Applied Geophys-ics,2007,4(2):94-100.
[4]Ke B X,Zhao B,Liu C Y,et al.Wave-equation datuming based on a single shot gather[J].SEG Expanded Abstracts,2004,23:2156-2159.
[5]Reshef M.Depth migration from irregular surfaces with depth extrapolation methods[J].Geophysics,1991,56(1):119-122.
[6]Yang K,Zheng H M,Wang L,et al.Application of an in-tegrated wave-equation datuming scheme to overthrust data:A case history from the Chinese foothills[J].Geo-physics,2009,74(5):B153-B165.
[7]Zhou H W,Li P M,Yan Z H,et al.Constrained deform-able layer tomostatics[J].Geophysics,2009,74(6):WCB35-WCB46.
[8]Zhu X H,Angstman B G,Sixta D P.Overthrust imaging with tomo-datuming:A case study[J].Geophysics,63(1):25-38.
[9]Zhou H W.Multiscale deformable-layer tomography[J].Geophysics,2006,71(3):R11-R19.
[10]Aki K,Richards P G.Quantitative Seismology[M].Uni-versity Science Books,San Francisco,2nd Ed,2002.
[11]Knopoff L,Gangi A F.Seismic reciprocity[J].Geophys-ics,1959,24(4):681-691.
[12]贺振华.反射地震资料偏移处理与反演方法[M].重庆:重庆大学出版社,1989.
[13]Claerbout J F,Black J L.Basic Earth Imaging.2005,http://sepwww.stanford.edu/sep/prof/.
[14]Tanis M C,Stoffa P L,Pestana R.Prestack depth migra-tion in the source-offset domain[J].SEG Expanded Ab-stracts,1998,17:1839-1842.
[15]Popovici A M.Prestack migration by split-step DSR[J].Geophysics,1996,61(5):1412-1416.
[16]Wu R S.Synthetic seismograms in heterogeneous media by one-return approximation[J].Pure and Applied Geo-physics,1996,148(2):155-173.
[17]Kessinger W.Extended split-step Fourier migration[J].SEG Expanded Abstracts,1992,11:917-920.
[18]刘文革,贺振华,黄德济,等.非零偏移距DSR叠前深度偏移[J].西南石油大学学报:自然科学版,2008,30(1):43-46.
[19]刘文革.海相碳酸盐岩储层地震响应特征数值模拟[D].四川成都:成都理工大学,2008.
[2]Berryhill J R.Wave-equation datuming[J].Geophysics,1979,44(8):1329-1344.
[3]Cui X F,Li H B,Hu Y,et al.Wavefield continuation da-tuming using a near surface model[J].Applied Geophys-ics,2007,4(2):94-100.
[4]Ke B X,Zhao B,Liu C Y,et al.Wave-equation datuming based on a single shot gather[J].SEG Expanded Abstracts,2004,23:2156-2159.
[5]Reshef M.Depth migration from irregular surfaces with depth extrapolation methods[J].Geophysics,1991,56(1):119-122.
[6]Yang K,Zheng H M,Wang L,et al.Application of an in-tegrated wave-equation datuming scheme to overthrust data:A case history from the Chinese foothills[J].Geo-physics,2009,74(5):B153-B165.
[7]Zhou H W,Li P M,Yan Z H,et al.Constrained deform-able layer tomostatics[J].Geophysics,2009,74(6):WCB35-WCB46.
[8]Zhu X H,Angstman B G,Sixta D P.Overthrust imaging with tomo-datuming:A case study[J].Geophysics,63(1):25-38.
[9]Zhou H W.Multiscale deformable-layer tomography[J].Geophysics,2006,71(3):R11-R19.
[10]Aki K,Richards P G.Quantitative Seismology[M].Uni-versity Science Books,San Francisco,2nd Ed,2002.
[11]Knopoff L,Gangi A F.Seismic reciprocity[J].Geophys-ics,1959,24(4):681-691.
[12]贺振华.反射地震资料偏移处理与反演方法[M].重庆:重庆大学出版社,1989.
[13]Claerbout J F,Black J L.Basic Earth Imaging.2005,http://sepwww.stanford.edu/sep/prof/.
[14]Tanis M C,Stoffa P L,Pestana R.Prestack depth migra-tion in the source-offset domain[J].SEG Expanded Ab-stracts,1998,17:1839-1842.
[15]Popovici A M.Prestack migration by split-step DSR[J].Geophysics,1996,61(5):1412-1416.
[16]Wu R S.Synthetic seismograms in heterogeneous media by one-return approximation[J].Pure and Applied Geo-physics,1996,148(2):155-173.
[17]Kessinger W.Extended split-step Fourier migration[J].SEG Expanded Abstracts,1992,11:917-920.
[18]刘文革,贺振华,黄德济,等.非零偏移距DSR叠前深度偏移[J].西南石油大学学报:自然科学版,2008,30(1):43-46.
[19]刘文革.海相碳酸盐岩储层地震响应特征数值模拟[D].四川成都:成都理工大学,2008.
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