鄂尔多斯盆地东缘黄土塬区地形起伏剧烈,低降速层厚度和速度横向变化大,表层结构复杂,折射波静校正表层模型建模困难,静校正问题突出.本文通过黄土塬区表层结构规律分析,提出了一种基于初至走时层析求取近地表速度、以等速度界面近似高速顶界面的表层模型约束建模方法;在基准面静校正概念的基础上,对比分析了基岩顶界面、层析速度收敛面等不同折射面解释方案对静校正量、标志层反射时间及平均速度的影响,结合实际钻井资料证实了在黄土塬区以基岩顶界面作为折射面能够获得正确的静校正量、标志层反射时间与平均速度. The topography of the loess plateau in the eastern margin of the Ordos Basin is characterized by drastic topography, large changes in thickness and velocity of low-decelerated velocities, complex surface structures, difficult modeling of refracted-statically-corrected surface models and outstanding static correction problems. , A surface model constrained modeling method based on first-arrival time-lapse tomography to obtain near-surface velocity and approximate high-speed top interface with constant velocity interface was proposed. On the basis of the concept of static correction of base-level, , Tomographic velocity convergent surface and other different refraction surface interpretation programs on the static correction, marking time and the average velocity of reflection, combined with the actual drilling data confirmed that in the loess plateau to the top of the bedrock as a refractive interface can get the correct static Correction volume, mark layer reflection time and average speed.