查询词典 migration velocity

So far the pattern of seismic prestack depth migration is the same as it abroad. Before the work of velocity building the original seismic data must be corrected on a datum plane, and then to make the prestack depth migration work.

目前我国叠前深度偏移的研究方向与国外基本一致，特别是在目前油田的实际勘探中，大多套用国外的模式，一般都是对原始资料校正在一个基准面后，然后开展叠前深度偏移工作。

The relations of electrophoresis velocity, electroosmosis velocity and electric dispersion velocity are also investigated with these expressions. The results show that this new model offers a better explanation for peak compression effect on the migration behaviour of charged solute in CEC. The retention time will be shorter by peak compression effect, which is similar to a solvent gradients process. The peak compression effect is not steady, and doesn't appear until the conditions are fitted in some special situation.

基于弛豫理论所建立的基本模型，在考虑溶质在两相中皆有可能发生正、反向迁移的情况下，得到了流出曲线一阶原点矩和二阶中心矩的理论表达式，并通过对溶质在两相中电扩散速率与电泳速率、电渗流速率关系的分析结果证实：溶质在固定相表面的电扩散行为可以使其保留变弱，出峰加快；而这种电扩散导致的超常柱效峰的出现具有不稳定性，只有在多方面因素综合影响匹配的情况下才可能出现。

But normal pre-stack migration imaging method could not meet the need of exploration in great fault with big obliquity and strong anisotropism glutenite body.Pre-stock time migration processing technology could be applied in studying on pre-stack migration pre-processing technology, establishing final velocity model and electing key parameters.

采用叠前时间偏移处理技术，开展针对性的叠前预处理技术、精细的速度模型建立和关键参数的合理选取等研究，三维叠前时间偏移处理较常规三维叠后时间偏移处理获得了较高质量的成像剖面，且输出的道集可以用于砂砾岩体储层描述研究。

Based on natural gas state equation and dynamic theory of natural gas migration, natural gas velocity of flow rate equation before and after temperature and pressure decreasing is fetched, and with which interface natural gas lengths in different reservoirs are calculated and the changing law of equivalent-length natural gas in migration is analyzed, whence it is discovered that migrating velocity of natural gas along tilting up reservoir is increasing inch by inch, along with temperature and pressure continuously decreasing.

由此发现，在运载层物性不变的情况下，天然气沿上倾地层向上倾方向运移的过程，是随地层温度和压力不断降低、其运移速度逐渐增大的过程，如果有后续气体的加入，会使气体长度增大，致使运移速度增加得更快。

Aiming at these problems, we have designed the processing workflow to effectively suppress the surface Wave interference, regular interference, high energy interference, and other random noise interference. The treatment clue was from thick to thin. Firstly, the spectral analysis method was used to establish macroscopic velocity field. Then, the ray tomography method was used to enhance the accuracy of velocity analysis and to establish a more accurate velocity model. Finally, the finite difference pre-stack depth migration on method in -k domain was adopted to solve the imaging problem of subsalt and salt dome flank.

通过合理组织处理流程，有效压制了面波干扰、规则于扰、强能量干扰和随机噪声干扰；采用由粗到细的思路，先利用谱分析方法建立宏现速度场，再利用射线层析成像方法提高速度分析精度，建立了较为准确的速度模型；利用频率－空间域有限差分叠前深度偏移解决了盐下及盐丘侧翼的成像问题。

The numerical tests show that, DSR equation migration methods such as common azimuth migration have a promising prospect in areas with strong variations of velocity, e.g., subsalt, reef and buried hill, etc.

数值试验表明，共方位角偏移等DSR方程叠前深度偏移方法在盐体或礁体、古潜山等强横向变速地区具有很好的应用前景。

Xwfd pre-stack migration based on wave equation has strong adaptability to the medium which has strong variable transverse velocity and it can be used for migration with dual-complexity.

波动方程的频率空间域有限差分深度偏移对介质速度横向变化有较强的适应性，适宜于复杂构造的偏移成像。

This one-way wave equation fits eikonal equation and transport equation corresponding to full acoustic wave equation in travel-time and first order amplitude. According to the perturbation theory often used in inverse solution, we split the velocity field into intraformational constant velocity background and variable velocity disturbance. Then we calculate time-shift quantity of migration and amplitude correction coefficients for wavefield depth continuation in total uniform formation and each formation.

基于反问题求解中常用的摄动理论，把速度场分裂为层内常速背景和变速扰动，求得整个均匀层波场深度延拓的偏移时移量及振幅校正系数、各层的偏移时移量及振幅校正系数，从而得到一个基于傅里叶有限差分法的双域保幅叠前深度偏移算子方程。

Accuracy of pre-stack migration velocity analysis is impacted by S/N and resolution of seismic data, geometry (mainly about observation aperture) and imaging method, which is difficult for quantitative evaluation.

叠前偏移速度分析的精度受地震数据的信噪比和分辨率、地震观测系统及成像方法的影响，很难进行定量的估计。

Wave equation migration velocity analysis is a linearized inverse problem.

波动方程偏移速度分析是一种线性反演方法，它要求对Born近似的展开序列作一阶截断。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了