相位移方法的两个新算法
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摘要
文中提出了有关相位移方法的两个新算法.一个是相位移分层算法,无论是模型还是偏移都可以实现剧烈纵横向变速;另一个是共炮检距剖面的相位移算法,运用几何地震学的绕射点公式和平面波分析方法,推出了常速介质条件下,共炮检剖面的模型和偏移的相位移公式.两种新的相位移算法都保留了原相位移方法的优点.合成记录的例子,进一步验证了方法、原理的正确性.
The paper presents two new algorithms of the phase shift method. One is layer-stripping phase shift algorithm. It can handle the strong lateral and vertical variation of velocity in both modeling and migration compatation. The other is phase shift algorithm of contant offset modeling and migration.Their formulas are derived for constant velocity medium, based on geometry seismology diffraction curve and plane wave analysis approach. All new algorithms still have characteristic of the phase shift method. The synthetic examples demonstrate that the new algorithms are right.
The paper presents two new algorithms of the phase shift method. One is layer-stripping phase shift algorithm. It can handle the strong lateral and vertical variation of velocity in both modeling and migration compatation. The other is phase shift algorithm of contant offset modeling and migration.Their formulas are derived for constant velocity medium, based on geometry seismology diffraction curve and plane wave analysis approach. All new algorithms still have characteristic of the phase shift method. The synthetic examples demonstrate that the new algorithms are right.
引文
[1]Gazdag J.Wave equation migration with the phase shift method.Geophysics ,1978,43:1342～1351
[2]Dubruite A A.Numericals for the migradtion of constant-offset sections in homogeneous and horizontally layered media.Geophysics,1983,48:1195～1203
[3]Gardner G H F,Lu L editors.Slant-Wave Processing:Reprint Series.Tulsa USA:SEG,1991,14
[2]Dubruite A A.Numericals for the migradtion of constant-offset sections in homogeneous and horizontally layered media.Geophysics,1983,48:1195～1203
[3]Gardner G H F,Lu L editors.Slant-Wave Processing:Reprint Series.Tulsa USA:SEG,1991,14
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