本次处理工作是在三维偏移数据体的基础上，抽取48条连井线进行。
The processing has been done on the basis of 3-D migrated data volume with 48 well-connecting lines being selected.
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。
Degradation in the quality of migration images can arise because of alias during Kirchhoff 3-d migration.
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 paper presents the methods and steps of building 3-D migration velocity field with "Slice Method"on INTERBASE system of CGG.
本文讨论了倾斜平界面的表现形态和法向深度剖面的三维偏移归位公式，同时研究了二步法三维偏移。
This paper discusses the appearance of dipping plane interface and the formula of 3d migration for normal depth section and 3d migration in two steps.
对该方法的合理性用理论模型进行了试验，并给出了三维理论模型以及三维偏移理论剖面和三维偏移地震记录剖面及其它们的横向切片。
The rationality of this method is tested by theoretical model. The 3D theoretical model, 3D theoretical migration section, 3D migrated seismic section and their seiscrop sections are presented.
在频率-波数域中，详细地推导出了对地震记录进行三维偏移归位的全部计算公式，并给出了能在中小型计算机上实施的程序结构和流程。
Formulas for 3d migration of seismic data in frequency-wave number domain are derived. The software and procedure used on medium -sized computer and minicomputer are given.
三维地震及其叠前深度偏移技术及软件系统的研究、开发和应用取得显著成效。
Remarkable achievements were obtained in the research, development and application of three dimensional seismic exploration and its depth migration before stack technique as well as software system.
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。
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.
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。
For this reason, the lithological trap investigation has been carried out on the basis of full 3-d seismic migration data.
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。
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.
垂直和水平木板通过偏移创建出三维空间，为物品提供各种不同的高度和深度。
The vertical and horizontal planks are offset to create a three dimensional composition providing a variety of shelf heights and depths.
文中应用负射流理论解释三维计算中较大的数值粘性带来的尾迹偏移现象。
The negative eject theory is employed to explain the phenomena that the wake over-turn is due to large numerical viscosity.
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。
We have realized the parallelization of 3-D post-stack depth migration software on SP2 with PVM, and gained ideal parallel efficiency and scalability.
得出三维涡流场的场分布图和涡流损耗随导线偏移量的变化曲线。
Finally distribution of 3-d eddy-current field and variation curve of eddy current loss to the variation of wire position can be get.
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。
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.
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.
针对波动方程叠前深度偏移中重要的速度模型问题，研究了一套三维速度建模方法和软件。
Taking aim at solving the important velocity model problem in wave equation pre-stack depth migration, This paper studies the method and software of building 3d migration velocity model.
具有独特的速度建模、叠前深度偏移成像、高效并行计算、三维可视化和性能优化等特色技术。
Accurate velocity model building, advanced PSDM, high efficient parallel computing, 3-d visualization and performance optimization are characteristic techniques.
西湖凹陷三维地震连片处理中不同时期采集的三块地震数据在偏移距、覆盖次数、面元大小及方位角等方面存在较大差异。
Three blocks of data from Xihu sag were acquired with a wide variety of spread length, bin dimension, grid orientation, fold, etc.
波动方程偏移保持了波场动力学特征，依此本文应用共方位角叠前深度偏移技术来实现二维资料三维化处理。
Wave equation migration can preserve the kinetic characteristics of wave field, so this paper applies common-azimuth prestack depth migration technology to realize 3D process for 2D seismic data.
精确地获得光栅条纹中心线的相对偏移量，在三角形法测量物体三维轮廓技术中占有非常重要的地位。
The sub-pixel accuracy in abstracting the fringe-centerlines can be obtained by the method of barycenter after preprocessing the fringe picture using grating projection.
精确地获得光栅条纹中心线的相对偏移量，在三角形法测量物体三维轮廓技术中占有非常重要的地位。
The sub-pixel accuracy in abstracting the fringe-centerlines can be obtained by the method of barycenter after preprocessing the fringe picture using grating projection.
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