地震资料叠前深度偏移在CD地区的应用

本文针对复杂构造的成像问题，在ＣＤ地区开展了地震资料前深度偏移研究，并根据该区古生界册的地质特点和地震资料现状提出了一套处理流程，首先，对地震资料进行了精细的预处理，结合地质，测井和钻井等资料建立初始的地质模型；然后，利用ＣＭＰ道集相干反演速度分析方法建立整体的速度－深度模型；接着；利用偏移速度分析方法进行剩余速度分析，提高速度－深度模型的精度；最后，基于Ｋｉｒｃｈｈｏｆｆ积分偏理论进行叠前深度域

Application of prestack depth migration to seismic data from CD area

Prestack depth migration of seismic data in CD area was studied so as to copewith image of complicated geologic structure. According to both the geologic char-acteristics of Palaeozoic buried hills and the condition of seismic data in the area,we designed the following data processing steps:.Make the detailed preliminary processing of seismic data..Design an initial geologic model by analysing the corresponding seismic, geo-logic, logging and drilling data..Establish whole velocity-depth model by making the velocity analysis that in-volves CMP gather coherent inversion..Do residual velocity analysis to improve velocity-depth model by means of mi-gration velocity analysis method..Achieve prestack depth migration image based on Kirchhoff's integration mi-gration theory-The article gives example of prestack depth migration of 2-D seismic data. Theapplication effect of the technique is desirable.