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- In this paper we discuss the difference and relationship between CRP and CRS stacking, NMO/DMO stacking, as well as pre stack depth migration(PreSDM) and CRS stacking in a geometrical viewpoint and on the hypothesis of constant velocity media. 以几何描述的方式 ,在常速介质假设下通过图示定性描述CRP与CRS叠加之间 ,NMO/DMO叠加、叠前深度偏移 (PreSDM )与CRS叠加之间的区别与联系。
- Keywords Common shot gather;Pre stack depth migration;Paraxial wave equation;Finite difference;Frequency space domain.; 共炮道集;叠前深度偏移;傍轴近似方程;有限差分;频率-空间域;
- 3D wave equation pre--stack depth migration 三维波动方程叠前深度偏移
- High dip finite difference depth migration. 大倾角有限差分深度偏移
- By default, the maximum stack depth for the bookmark stack is set to15 entries. 默认情况下，书签堆栈最大深度被设置为15个入口。
- Velocity model building for prestack depth migration is a model based iteration process. 摘要叠前深度偏移速度建模是一种基于模型的迭代修正过程。
- The characteristics of Archaeozoic melamorphic reservoirs in Niuxintuo area have been studied through data of coring, 3700 logging and 3D seismic prestack depth migration. 综合运用钻井取心、3700测井、三维地震叠前深度偏移等资料,对牛心坨地区太古界变质岩储层特征进行了研究。
- In this paper, forward modeling technique is applied to pre-stack depth migration to accurately image the front overthrust nappe struct. 文章将地震资料模型正演技术应用到叠前深度偏移,探讨了一种有助于川西龙门山前缘逆掩推覆构造地震资料精确成像技术。
- For the high order generalized screen propagator prestack depth migration, the more the order is the better the result we get. 基于波场逐步累加的"直接下延"法是解决复杂地表和地质条件下叠前深度偏移成像的有效手段。
- The 3-D prestack depth migration principally includes three parts: travetime cal-culation, Kirchhoff summation, and velocity analysis. 利用深度偏移后的道集是否拉平进行速度分析，可以进一步修改速度模型。
- Finally, the finite difference pre-stack depth migration method in f-k domain was adopted to solve the imaging problem of subsalt and salt dome flank. 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 interpretation precision of target horizon by using prestack depth migration data is high com pared to real drilling. 利用叠前深度偏移资料解释的目的层层位，与实钻结果差异较小。
- 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。
- Wave equation-based prestack depth migration technique can accurately describe the wave field in complex media conditions and perform high resolution imaging. 基于波动方程的叠前深度偏移方法能在复杂介质条件下精确描述波场,且能高精度成像。
- Seismic data of depth domain has been applied widely along with the development of new geophysical technologies such as VSP, depth migration, crosswell seismic. 随着VSP、深度偏移、井间地震等物探新技术的出现,深度域地震记录的应用日益增多。
- How much do all these figures stack up to? 这些数字的总和是多少？
- The migration imaging range is determined according to the structural attitude of 3 D velocity model , and the variable range 3 D prestack depth migration is done on the CSP ... 用三维相移加校正方法在炮集上实现三维叠前深度偏移，并根据三维速度模型构造形态，自动确定偏移后成像孔径进行变范围偏移叠加，提高三维构造形态清晰度。
- It solves out the required multi-valued traveltime and amplitude at the uniform dispersed grids efficiently when applied to 3-D prestack depth migration. 本文算法应用于三维叠前深度偏移处理流程时，可高效地获得均匀网格点上地震波多值走时及振幅的数值计算结果。
- Based on high order generalized screen propagator, we used the method of "wave field downward continuation" to realize prestack depth migration from irregular topography. 基于高阶广义屏算子，应用直接下延法，实现了起伏地表条件下的高阶广义屏算子深度偏移。
- Using the wave equation prestack depth migration on SEG-EAGE 2-D salt dome model as an example, the two-order generalized screen propagator increases 30% calculation work relative to the conventional one-order) generalized screen propagator. 以SEG-EAGE二维盐丘模型数据的波动方程叠前深度偏移为例，二阶广义屏传播算子相对于常规（一阶）广义屏传播算子增加了30%25的计算量。
