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地震走时层析建模技术是解决复杂近地表模型速度建模问题的重要技术.该方法是一种迭代反演方法,在地震反演过程中需反复计算地震射线走时.本文采用交互初至拾取方法,通过层析反演出近地表模型,对比分析了走时层析反演表层模型与野外表层模型差别,从而引入了控制点成果约束的层析反演综合建模技术.最终将野外调查成果同走时层析反演建模结合起来,运用非线性走时层析反演技术,通过可视图片、数据、曲线的比较,得出如下结论:在速度纵横向变化大的复杂地区,通过野外资料与室内处理信息交互约束,可以为建立符合实际情况的近地表模型奠定基础,进一步为地震采集资料静校正处理方法的确定和叠加剖面品质提高创造了条件.
Earthquake strike time tomography modeling technique is an important technique to solve the velocity modeling problem of complex near-surface models, which is an iterative inversion method that requires repeated calculation of seismic travel time in the seismic inversion process.In this paper, Method, the near-surface model was derived by tomographic inversion, and the difference between surface-time model and field model was compared and analyzed, then the integrated modeling technique of tomographic inversion was introduced.Finally, Combined with time-lapse tomography modeling, the nonlinear time-history tomographic inversion technique was used to compare the visible images, data and curves to draw the following conclusions: In the complex areas with large changes of the vertical and horizontal velocities, The information interaction constraints of indoor processing can lay a foundation for the establishment of near surface model that is in line with the actual situation and further set the conditions for the static correction processing of seismic acquisition data and the improvement of the quality of superimposed profile.