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叠前深度偏移是解决复杂构造成像问题的最有效手段。在分析叠前深度偏移的技术特点及实现过程的基础上 ,提出了以叠前精细处理、约束建模、剩余速度分析模型优化迭代及变孔径Kirchhoff偏移为核心的一套叠前深度偏移处理流程。利用Omega系统三维叠前深度偏移软件对平方王潜山实际资料的处理结果表明 ,潜山部位的成像效果有了明显的改进 ,归位准确 ,断点清楚 ,潜山顶面反射清晰可靠 ,与上覆地层的接触关系更加合理 ,潜山内幕的反射也有所加强。为本区下一步的勘探布署工作提供了有利的证据。
Prestack depth migration is the most effective method to solve the problem of complex structure imaging. Based on the analysis of the technical characteristics and implementation process of prestack depth migration, a set of prestack depth deviations with pre-stack fine processing, constrained modeling, residual speed analysis model optimization iteration and variable aperture Kirchhoff migration as the core Move the process. The results of processing actual data of Wangfangshan buried hill using Omega system 3D prestack depth migration software show that the imaging results of the buried hill have been obviously improved. The results are accurate and the breakpoints are clear. The top surface reflection of buried hill is clear and reliable, Stratigraphic contact with the more reasonable, buried hill reflections have also been strengthened. This will provide favorable evidence for the exploration and deployment work in this area.