深度偏移      depth migration(1069) depth shift(4) depth imaging(4) depth measurement(0) map migration(2)   depth migration     Wave Equation Plane-wave Depth Migration     波动方程平面波深度偏移 短句来源     Development of depth migration and its application     深度偏移的发展与应用概况 短句来源     Directional derivative method for 45°acoustic equation poststack depth migration     45°方程叠后深度偏移的方向导数法 短句来源     Prestack wave equation depth migration of field crosshole seismic data     井间地震野外资料的叠前波动方程深度偏移 短句来源     FACTORIZATION AND FITTING METHOD FOR 3-D WAVE EQUATION DEPTH MIGRATION WITHABSORBING BOUNDARY CONDITIONS     波动方程三维吸收边界分解与拟合深度偏移方法 短句来源 更多          depth shift     ProcessIng Skills and Application of 3-D Prestack Depth Shift     三维叠前深度偏移处理技巧与应用 短句来源     Based on the complexity of fracture system in the area, two models are designed for checking the effectiveness of prestack depth shift result to understand the practicality of processing method to the complicated structure.     基于研究区断裂系统复杂 ,为了解所用处理方法对复杂构造的适用性 ,设计了 2个模型来检验叠前深度偏移效果的有效性 ; 短句来源   depth imaging     Steep dipping structure depth imaging using wave equation based migration schemes on 3-D sparse dataset     稀疏采样下陡角度构造的波动方程深度偏移成像 短句来源     In this paper authors introduce the relevant techniques about the 2D multi-lines pre-stack depth migration processing for the DF1-1 structure, establishe the 3D geological model by the map migration method,and provide an effective method about the 3D depth imaging for non-3D exploration area.     介绍了有关DF1-1构造二维多测线叠前深度偏移的处理技术,并采用图偏移方法建立了三维地质模型. 为非三维勘探区的三维深度域成像提供了一种有效的方法. 短句来源   map migration     In this paper authors introduce the relevant techniques about the 2D multi-lines pre-stack depth migration processing for the DF1-1 structure, establishe the 3D geological model by the map migration method,and provide an effective method about the 3D depth imaging for non-3D exploration area.     介绍了有关DF1-1构造二维多测线叠前深度偏移的处理技术,并采用图偏移方法建立了三维地质模型. 为非三维勘探区的三维深度域成像提供了一种有效的方法. 短句来源   查询“深度偏移”译词为其他词的双语例句   查询“深度偏移”译词为用户自定义的双语例句     我想查看译文中含有：的双语例句 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法，我们为您准备了出自英文原文的大量英语例句，供您参考。   depth migration This paper presents a new depth migration method, adaptive spatial-division split-step Fourier (ASDSSF) migration.        A prestack depth migration method for irregular surface topography was used to reproduce the normal fault model with high accuracy.        Wave equation prestack depth migration has the ability of imaging complex media and steeply dipping layers.        Beamlet prestack depth migration and illumination: A test based on the Marmousi model        We introduce the basic principles of beamlet prestack depth migration that includes a windowed Fourier transform and frame theory.        更多             depth shift Again, we would like to stress that Lmin measures the depth shift at which the defocus blur becomes comparable to the diffraction and sampling blurs.        To facilitate the comparison of the core description depths to the well log depths, a core-to-log depth shift was necessary.          depth imaging Panoramic Depth Imaging: Single Standard Camera Approach        In this paper we present a panoramic depth imaging system.        Applications that facilitate integrating data and expertise from several disciplines leverages depth imaging technology.        Accuracy of the earth model is ensured by leveraging integrated tools and implementing an interpretive approach throughout the depth imaging project.        A sparse grid of 2D lines enables building a space-consistent velocity model, which can serve consistent depth imaging of all lines of the vintage.        更多             depth measurement Pit-depth measurement on large diameter pipes by tangential radiography using a Co-60 gamma-ray source        It is considered that the classification will help to determine the sites for snow depth measurement, stratigraphy observation and snowpits sampling.        Improved sentinel node localisation by pre-operative node depth measurement using lymphoscintigraphy and ultrasound in patients        Laser-induced morphological changes of poly(methyl methacrylate), poly(N-vinylcarbazole), and gelatin films doped with porphyrins have been studied by etch depth measurement and scanning electron microscopy.        Due to a decrease in the relative height the inner limiting membrane should not be taken as the reference level for optic-cup-depth measurement.        更多             其他 Plane-wave depth migration was done in wavenumber-frequency domain in this paper. The acoustic wave equation was replaced by the coupledfirst order in depth system of equations, the formula was derived, by which the wave field was continued downward. Rcconstruction was done every depth step with the imaging conditions, accurate migration could be attained. In the extrapolating formula, function ex was approximated by a series consisting of Chebyshev expansion, which converges exponcntially, so it could adap... Plane-wave depth migration was done in wavenumber-frequency domain in this paper. The acoustic wave equation was replaced by the coupledfirst order in depth system of equations, the formula was derived, by which the wave field was continued downward. Rcconstruction was done every depth step with the imaging conditions, accurate migration could be attained. In the extrapolating formula, function ex was approximated by a series consisting of Chebyshev expansion, which converges exponcntially, so it could adap laterally variable velocity structure and keep high auuracy. 在空间一频率域内进行平面波深度偏移。将声波方程化为常微分方程组，得到波场延拓公式并由此将波场逐层下推，根据平面波的成像原理逐层进行成像处理，可得到精度很高的偏移结果。递推公式中的函数ｅｙ选用Ｃｈｅｂｙｓｈｅｖ多项式构成的快速收敛级数进行逼近，以适应横向速度变化且保持很高的精度。 Increasing attention is paid to prestack depth migration in view of its irnportanceto complicatedustructure image. Papers of depth migration increase yearly. Many ollcorporations or research groups have been developing a lot of practical softwares fordepth migration. The development of depth migration is described to advance the research on Chian ls depth migration technique. 叠前深度偏移作为复杂构造成像的手段日益受到重视。近年来，有关于深度偏移的文章逐年增多，许多国外石油公司或研究小组相继推出了许多实用深度偏移软件。本文的目的在于通过论述深度偏移技术的发展概况，促进我国关于这一技术的研究工作。 Without taking aceount of the lateral variation of velocities, time migration may cause stratigraphie images to deviate from their correct underground positions. Starting from the 45° depth migration cquation, we introduce a parameter called Mirectional derivativeu and incorporate tht refraction effect term caused by lateral velocity variation into the directional derivative so as to make the depth migration be formally consistent with the corresponding time migration. In this way,depth migration is achicvable... Without taking aceount of the lateral variation of velocities, time migration may cause stratigraphie images to deviate from their correct underground positions. Starting from the 45° depth migration cquation, we introduce a parameter called Mirectional derivativeu and incorporate tht refraction effect term caused by lateral velocity variation into the directional derivative so as to make the depth migration be formally consistent with the corresponding time migration. In this way,depth migration is achicvable with the current application module after a slight modification,i. e. increasing the part of non-integer nodes for interpolation. The efficiency in both computation and programming is thus improved. The results frorn numerical trial show that this method is reliable and effective. 时间偏移由于忽略了速度的横向变化而导致成像偏离正确位置。作者从45°深度偏移方程出发，引出方向导数，并将速度横向变化所引起的折射效应项纳入此方向导数内，使所构造的深度偏移方法在形式上与相应的时间偏移方法一致。因此，只需对目前生产中应用的时间偏移模块略作修改，即增加非整数节点插值部分，就可实现深度偏移。这样不仅节省了计算工作量，提高了计算效率，而且也缩短了编程的时间。数值试验结果表明，方法是可靠有效的。   << 更多相关文摘      相关查询 kirchhoff深度偏移 叠后深度偏移 三维深度偏移 分层深度偏移 反深度偏移 深度偏移校正 深度偏移剖面 深度偏移成像 叠前深度偏移 偏移） 射线变速深度偏移 三维叠前深度偏移

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