一、问题的提出“相遇剖面法”是地震勘探中求解地层界面线的常用方法,这种方法的基本依据是分别由剖面两端激发所得的两支时距曲线,互为正、反时距曲线(或称“相遇时距曲线”),如图2所示。曲线末端时间T_(AB)及T_(BA)称“互换时间”。在两端激发、接收条件相同情况下,地震往返波的互换时间应相等。但 First, the proposed problem “meeting profile method” is a common method for solving formation interface lines in seismic exploration. The basic basis for this method is the two time-slip curves obtained by exciting the two ends of the profile respectively. The time-span curve (or “meeting distance curve”) is shown in Figure 2. The curve end time T_(AB) and T_(BA) are called “interchange time”. In the case of the same excitation and receiving conditions at both ends, the interchange time of the seismic round-trip waves should be equal. but