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1·Migration velocity is the key factor which influences the migration result.

偏移速度是影响偏移效果的关键因素。

2·As to migration velocity analysis, it is suggested to start with a little higher initial velocity.

在偏移速度分析中，从稍大的速度开始分析会对速度分析更加有利。

3·Besides, the effect of migration velocity on imagery depth and preprocess of real data are discussed.

文中还就偏移速度对成像结果的影响和实际资料的预处理问题进行了讨论。

4·Because of the ambiguity of seismic migration velocity, the quality of seismic migration imaging always bores people.

由于地震偏移速度的不确定性，偏移成像的质量很难得到保证。

5·We analyze theoretically the existence of precursor anomaly migration and the nonlinear variation of migration velocity.

从理论上对前兆异常迁移性的存在与迁移速率的非线性变化进行了分析。

6·Applying this approach to real data shows that the estimated migration velocity reliably converges to the correct velocity.

此方法用于实际数据，结果证明该方法提取的偏移速度模型非常接近真实的速度。

7·The paper presents the methods and steps of building 3-D migration velocity field with Slice Methodon 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。

8·Using special common offset gather for crosshole seismic, a migration velocity analysis method is developed for crosshole seismic.

利用井间地震特有的共偏移距道集，找出了适宜于分析井间地震偏移速度的方法。

9·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。

10·The correct migration velocity can be estimated by integrating the right percentage of the velocity model, which produces the greatest improvement.

准确的偏移速度可以通过选用正确的速度模型百分比估算出来，可使成像效果得到最显著的提高。