Degradation in the quality of migration images can arise because of alias during Kirchhoff 3-d migration.
克希霍夫三维偏移过程中，由于受假频的影响，偏移成像结果的质量往往会降低。
The paper presents the methods and steps of building 3-D migration velocity field with "Slice Method"on INTERBASE system of CGG.
本文介绍了在CGG的INTERBASE系统上用“切片法”建立三维偏移速度场的方法和步骤。
The pseudo 3-D migration-accumulation model based on buoyancy and Darcy's Law is used to simulate on secondary hydrocarbon migration.
对于油气二次运移，采用基于浮力驱动及达西定律的拟三维运聚模型。
To cope with the fault interpretation problem in interpretation of 2 D stacked migration section, a method is proposed in this paper for fault interpretation.
针对二维地震叠偏剖面解释中存在的断层解释问题，提出了叠偏剖面断层解释方法，阐述了断点解释、组合断层与层位闭合、断面闭合及归位次序之间的关系。
We have realized the parallelization of 3-D post-stack depth migration software on SP2 with PVM, and gained ideal parallel efficiency and scalability.
使用PVM编程，将串行的三维叠后深度偏移软件，在SP2上实现了并行化，获得了理想的并行效率和可扩展性。
The 3-D wave equation prestack depth migration is one of the most important techniques in the structure imaging and the inversion of elastic parameters of complex media.
三维波动方程叠前深度偏移是复杂介质中进行构造成像、弹性参数反演的重要环节。
General speaking, the matrix inversion will consume a large amount of computation time, which heavily hinder the application of 3-d implicit scheme in waveform migration.
通常，这种矩阵的求逆将耗费大量计算时间，严重制约了三维隐式方法偏移在实际资料处理中的广泛应用。
Theoretical analysis shows that near field 3-d range migration imaging technique can reduce computational complexity in much degree by contrast with back propagation algorithm.
理论分析表明：近场三维距离偏移算法与后向投影算法相比，能在较大程度上减少运算量。
For this reason, the lithological trap investigation has been carried out on the basis of full 3-d seismic migration data.
为此，以全三维地震偏移资料为基础的岩性圈闭研究得以开展。
Because of influence of aperture of migration operator, the image of 3-d seismic data volume in space is smeared after migration, which is unfavorable for detecting the faults.
但由于偏移算子的孔径影响，经偏移得到的三维地震数据体在空间上被模糊了，不利于进行断层检测。
Because of influence of aperture of migration operator, the image of 3-d seismic data volume in space is smeared after migration, which is unfavorable for detecting the faults.
但由于偏移算子的孔径影响，经偏移得到的三维地震数据体在空间上被模糊了，不利于进行断层检测。
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