层析静校正在层状结构黄土塬的正演模拟与应用

Forward Modeling and Application of Tomography Static Correction in Layered Structure of Loess Tableland

针对层状、速度横向变化的黄土结构静校正问题,建立地形起伏较大的层状地震模型并正演模拟,对此分别进行折射和层析静校正的处理及对比,进而得到叠加剖面对比图,并结合实际资料的验证,得出:在层状速度结构的黄土塬地区静校正问题上,层析静校正能解决长短波长静校正问题,而折射静校正只能部分解决长短波长静校正问题,存在一定的高低频误差。

For the problem of static correction caused by the layered and lateral velocity variation of loess structure, terrain fluctuation and layer seismic model is established and forward modeling,respectively processing and comparing the ways of refraction static correction with tomography static correction and stack section contrast figer, then connecting with the actual data validation. Finally it is concluded that in solving the problem of layer velocity structure of the loess tableland area on the static correction, tomography static correction can solve the problem of long and short wavelength static correction, but the refraction static correction can only solve part of the problem of long and short wavelength static correction, having some high and low frequency error.