新疆石油地质

新疆石油地质 ›› 2004, Vol. 25 ›› Issue (3): 315-319.

• 应用技术 • 上一篇    下一篇

旋转变换和viterbi 算法在波动方程叠前深度偏移预处理中的应用

朱振宇1, 刘洪1, 裴江云2, 吕小林2, 李幼铭1   

  1. 1.中国科学院地质与地球物理所,北京100029;
    2.中国石油 大庆油田有限责任公司勘探开发研究院，黑龙江大庆163712
  • 收稿日期:2003-06-15 发布日期:2020-09-18
  • 作者简介:朱振宇(1973-),男，山东安丘人,在读博士研究生,地球物理。联系电话:010-62007939。
  • 基金资助:
    国家自然科学基金和大庆石油管理局资助项目(编号49894 190);中国科学院知识创新工程资助项目(编号KZCX1-y01; KZCX-SW-18)

Application of Rotation Transform and Viterbi Algorithm in Prestack Depth Migration Preprocessing of Wave Equation

ZHU Zhen-yu1, LIU Hong1, PEI Jiang-yun2, LV Xiao-lin1, LI You-rming1   

  1. 1. Institute of Geology and Geophysics, CAS, Beijing 100029, China;
    2. Reserch Institute of Exploration and Development, Daqing Oilfield Company Ltd. PetroChina, Daqing, Heilongjiang 163712, China
  • Received:2003-06-15 Published:2020-09-18

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摘要： 波动方程叠前深度偏移运算,要求所输入的地震数据网格为规则化网格。在地震数据的野外采集中,由于地形复杂、考虑地下覆盖次数等问题，观测系统多存在变观现象。同时,为了避免由于联络测线方向采样稀疏而产生的空间假频,须要在该方向进行地震道的插值。运用旋转变换解决了测线与坐标轴方向不一-致的问题,用viterbi 算法完成了同向轴的自动拾取,结果令人满意,为波动方程叠前深度偏移预处理提供了两种有效可行的方法。

关键词: 波动方程, 观测系统, 旋转, 同相轴, 预处理

Abstract: In prestack depth migration with wave equation, the input seismic data grid is required to be regularized grid. However, during the field seismic data acquisition， the visual variation occurs in acquisition system， due to complex landscape or relief and seismic coverage times. Such alias produced by sparse samples along the on-line should be interpolated between tracks. This paper deals with the variance between the seismic line and the coordinate orientation by rotation transform and realizes the auto pickup of events by Viterbi algorithm, obtaining satisfactory results. These two methods are feasible to preprocessing of prestack depth migration of wave equation.

Key words: wave equation, acquisition system, rotation, event, preprocessing

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