The field migration stack profile is high quality.
实际雷达资料的偏移叠加剖面质量较高。
Migration velocity analysis is one of the key steps in pre stack depth migration whose accuracy directly affects the quality of pre stack depth migration.
偏移速度分析是叠前深度偏移的关键步骤之一，它的准确与否直接影响叠前深度偏移的质量。
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.
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。
Then, software about velocity analysis, stack and migration are studied and analyzed basing on the characteristics of the hydrate.
其次，我们还针对天然气水合物的特性，研究并分析了资料处理过程中的速度分析、叠加处理、和偏移处理软件。
As the most physical of the shot-profile wave equation pre-stack depth migration involving huge extrapolation calculation, the calculation is extremely time-consuming and less efficient.
作为最具物理性的共炮点道集的波动方程叠前深度偏移，涉及庞大的波场外推计算量，计算极其耗时，效率较低。
Based on plane wave decomposition, We propose a wave-equation depth migration method for pre-stack seismic data.
提出了一套基于平面波分解的波动方程叠前地震数据深度偏移方法。
Do I really have to implement the core data stack initialisation by hand just to be able to pass migration permissions?
我真的必须手动实现核心数据栈初始化才能够通过迁移权限？
Common focus point (CFP) migration based on the equal travel-time principle is a kind of pre-stack depth migration method through focusing in both emission and detection.
共聚焦点(CFP)偏移是基于等时原理，通过激发聚焦和检波聚焦的双聚焦实现叠前深度偏移的地震成像方法。
Pre stack depth migration which starts directly from undulating earth surface turns out to be a valid way to deal with irregular topography and complex geologic structures.
直接从起伏地表开始的叠前深度偏移方法是对付复杂地表和复杂地质构造成像的有效手段。
Therefore, the wave equation pre-stack depth migration, a method starting directly from the rolling surface, is discussed.
为此，探讨了直接从起伏地表开始的波动方程叠前深度偏移方法。
This paper has made some searching in Complex structure fine pre-stack processing and pre-stack migration imaging, and has achieved some results.
本文就这两个问题，在复杂构造叠前精细处理、复杂构造叠前偏移成像等方面开展了一些探索，取得了一定的效果。
For enhancing the migrated imaging, these techniques, like DMO, migration velocity field smoothing and pre-stack depth migration, are used.
采用DMO、偏移速度场平滑、叠前深度偏移等技术提高偏移成像精度。
Pre-stack depth migration technique can be realized either in shotpoint receiver domain or in CMP offs et domain.
叠前深度偏移技术既可在炮点—接收点域实现，也可在共中心点—炮检距域实现。
With the requirment of precise seismic interpretation and thoroughgoing exploration, the conventional post-stack migration reveals its limitations.
随着勘探和开发对地震资料处理成果的要求越来越高，常规叠后时间偏移处理技术的缺陷日益显现出来。
At the same time, the complex characteristics of underground structure make conventional stack and post-stack migration methods can not accurately imaging.
同时，由于地下复杂构造特征使得常规叠加和叠后偏移方法不能准确的成像。
Although the wave field based pre-stack depth migration is the most reliable method for complex structure imaging, it has a high computation cost and a poor adaptation to geometry.
基于波场延拓的叠前深度偏移是实现复杂构造地质体成像的可靠方法，但存在着计算量大、对观测系统适应性差等缺点。
Pre-stack depth migration is an important method used to explore complex area.
叠前深度偏移是人们解决复杂条件下勘探的重要方法。
The technique of seismic pre-stack depth migration is used to correctly implement the complex structural imaging.
采用地震造前深度偏移技术，使复杂构造正确成像。
In recent years, people have developed several migration techniques which don't use common-shot records in order to improve computational efficiency for pre-stack migration.
近些年出现了旨在提高叠前偏移计算效率的多种非共炮记录的偏移方法。
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。
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.
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.
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。
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