【摘要】 20 0 4年第 1期《石油地球物理勘探》上发表的“层状介质时移时差研究”(以下简称“时差”)一文有关近似速度反演方法值得讨论 ,本文给出了直接速度反演的精确公式。通过理论分析 ,笔者认为对于均匀水平层状介质 ,相应于同一激发点和检波点的射线路径是惟一的。模型计算表明 ,在不同水驱条件下 ,“时差”一文基于同激发点和接收点的时差计算结果普遍偏大 ,但其所反映出的时差变化规律性与本文所给出的定性分析结论是一致的。更多还原

【Abstract】 The method of approximate velocity inversion in the paper“time difference of time-lapse in layered medium” (simplified as “time difference” in the follows) published by《Oil Geophysical Prospecting》 is worth discussing.The paper gave accurate formula of direct velocity inversion.The author considered by theoretical study that the raypath corresponding to same shot point and receiver point is unique in uniform horizontal layered medium.The model test showed that the calculated result of time difference based on shot point and receiver point is generally larger,but the rule of variation reflected in time difference is coincident to qualitatively analyzed result in the paper.更多还原