【摘要】 表层模型层析反演是一种非线性模型反演技术,它利用地震初至波射线的走时和路径反演介质速度结构,不受地表及近地表结构纵横向变化的约束。根据正演初至时间与实际初至时间的误差,修正速度模型,经反复迭代,最终达到要求的误差精度。求取静校正时采用射线法计算炮点到检波点的旅行时,从而得到基准面校正量。更多还原

【Abstract】 Surface model tomographic inversion is a kind of nonlinear model inversion technique. Using traveltime and path of seismic initial wave to inverse the velocity structure of media, it is not constrained by longitudinal and transverse variations of surface and near-surface structures. On the basis of the error caused by the difference between forward initial time and practical initial time, the velocity model is revised and, through repeated iteration, the error precision required can be attained. In working out static correction, the beam method is adopted to calculate the traveltime between the shot spot and the detection spot. In this way, the datum level correction quantity can be obtained.更多还原