【摘要】 介绍在简化的双曲型时距曲线方程中应用射线平均速度计算多层介质地震反射波旅行时的方法与效果。地震反射波时距方程的估计精度对地震勘探记录的动校正及偏移成像质量的影响很大。本文提出利用射线平均速度计算反射波旅行时的方法,并用于多层介质中层状均匀各向同性模型和层状弱各向异性模型中计算反射波旅行时。通过对比这两种模型中用射线平均速度、均方根速度、平均速度,以及非双曲线时距方程计算的反射波旅行时与其理论值的误差,认为在炮检距较大的情况下,通过在双曲时距方程中引入射线平均速度,可以比较更精确的计算出反射波旅行时。更多还原

【Abstract】 The authors introduce methods and advantages which were used ray average velocity to calculate the multilayered media of seismic reflected wave travel time in the hyperbolic equation.Estimating accuracy of seismic reflection wave time-distance equation,which had great influenced on quality of the records of seismic exploration NMO and imaging and migration.This paper was introduced ray average velocity to calculate reflected wave traveltime in layered isotropic media and layered weakly anisotropic media.As for these two models,the average velocity of ray,the average velocity,the root-mean-square velocity and no-hyperbolic curve equation was used to calculate the travel time of reflected wave,which compared with the analytical value.The results of calculation show that the effect of using the average velocity of ray is the best in the larger offset and hyperbolic time-distance curve equation.更多还原