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三维声学模型的记录剖面中,常含有不能由经典的射线理论来加以预测的绕射波。从典型的地质构造模型如向斜、背斜和断层所得到的一些观察的和计算的记录剖面,证实了这一绕射现象。要勾绘出地质构造的一定部位,需要对这种绕射波的特征和时差进行仔细地解释。遥场推迟位方程式,适宜于用来作直接时间域的估价和用来合成计算剖面。计算和观察记录剖面间的良好对比,暗示数学模型技术可能是提高野外解释的一种有用工具。
The recorded sections of three-dimensional acoustic models often contain diffracted waves that can not be predicted by classical ray theory. This diffraction phenomenon is confirmed by some observed and calculated recording profiles obtained from typical geotectonic models such as synclines, anticlines and faults. To map a certain part of the geological structure, the characteristics and time difference of this diffraction wave need to be carefully explained. The remote field postpones the bit equation, which is suitable for the estimation of the direct time domain and for the synthesis of the calculated profile. A good comparisons between calculated and observed recording profiles suggest that mathematical modeling techniques may be a useful tool for improving field interpretation.