适于复杂地质模型的三维射线跟踪方法
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摘要
复杂地质体模型的三维射线跟踪方法在数值计算时随波阵面自动生成射线跟踪所需的计算单元,无需对复杂地质体模型预先进行模型离散化.基于计算中自动生成的计算单元,进行射线跟踪计算时就无需求解射线路径与计算单元数值边界的交点,因而具有甚高的计算效率.本文方法不仅可作为地震资料叠前成像的算法基础,而且还为复杂介质中波场高频渐近解的计算提供一种最佳的计算途径.
A fast and accurate method for raytr8dng in 3 -D media is propond in this paPer'Wth this method, the comPleX gcologic modeS does not ned to be diwt beforerayhadng, and the Cells for comPuhng raypath can be generetal along with wavefr0ntSautomahcally. Band 0n these cells, it is unnunry t0 calculatC the inteedons of araypath and any nUmtrical boundary during the raytr8dng' Several nUmerha examPlesare given here' The mcthod presental in this paPer possess very high effitw incomutahon'
A fast and accurate method for raytr8dng in 3 -D media is propond in this paPer'Wth this method, the comPleX gcologic modeS does not ned to be diwt beforerayhadng, and the Cells for comPuhng raypath can be generetal along with wavefr0ntSautomahcally. Band 0n these cells, it is unnunry t0 calculatC the inteedons of araypath and any nUmtrical boundary during the raytr8dng' Several nUmerha examPlesare given here' The mcthod presental in this paPer possess very high effitw incomutahon'
引文
[1] Reshe, M, Kostoff D, Migration of common shot gather, Geophysics, 324-331, 1986.
[2] Mdale, J., Finite difference calculation of traveltime, Bull. Seis for Am, 78,2062-2076, 1988.
[3]Mdale, J. Finite difference calculation of traveltime in three Dimensions,Geophysics, 55, 521-526, 1990.
[4]黄联捷、李幼铭、吴如山,用于图像重建的波前法射线追踪,地球物理学报,35,223-233,1992.
[5]Saito, H, Traveltime and raypaths of first arrival seismic waves:computation method based upon Huygens 'principle,Expanded Abstracts society of Exploration Geophyscist (SEG)59th Annual Intemational Meeting,244-247,1989.
[6]Moser, T, Shortest path calcuation of seismic rays, Geophysics,56,59-67.1991.
[7]刘洪、孟繁林、李幼铭,计算最小走时和射线路径的界面网全局方法,地球物理学报, 38, 823-831, 1995.
[8]Claude,F Lafond,Alan,R Levander, Fast and accurate dynamic raytracing in heterogeneos media, Buletin of the Seismological Society of America,80,1285-1296,1990.
[9]Langan, K T、 Lerche I,Cutler, R T, Tracing of rays though heterogeneous media:an accurate and efficient procedure,Geophysics,50,1456-1465,(1985).
[10]徐升、杨长春、刘洪、李幼铭,射线追踪的微变网格方法,地球物理学报,39,1,23-34,1996.
[2] Mdale, J., Finite difference calculation of traveltime, Bull. Seis for Am, 78,2062-2076, 1988.
[3]Mdale, J. Finite difference calculation of traveltime in three Dimensions,Geophysics, 55, 521-526, 1990.
[4]黄联捷、李幼铭、吴如山,用于图像重建的波前法射线追踪,地球物理学报,35,223-233,1992.
[5]Saito, H, Traveltime and raypaths of first arrival seismic waves:computation method based upon Huygens 'principle,Expanded Abstracts society of Exploration Geophyscist (SEG)59th Annual Intemational Meeting,244-247,1989.
[6]Moser, T, Shortest path calcuation of seismic rays, Geophysics,56,59-67.1991.
[7]刘洪、孟繁林、李幼铭,计算最小走时和射线路径的界面网全局方法,地球物理学报, 38, 823-831, 1995.
[8]Claude,F Lafond,Alan,R Levander, Fast and accurate dynamic raytracing in heterogeneos media, Buletin of the Seismological Society of America,80,1285-1296,1990.
[9]Langan, K T、 Lerche I,Cutler, R T, Tracing of rays though heterogeneous media:an accurate and efficient procedure,Geophysics,50,1456-1465,(1985).
[10]徐升、杨长春、刘洪、李幼铭,射线追踪的微变网格方法,地球物理学报,39,1,23-34,1996.
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