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本文在作者以前提出的模拟定位原理及其相应算法的基础上,提出了改进的原理──正演模拟定位原理2。改进后的原理是通过认识共炮记录正演模拟的实质,抛开偏移成像的因素,就正演而作正演。因此,在同样用单程声波方程获得完全一样的共炮点记录的正演记录的情况下,使用基于定位原理2的计算公式,可成百倍地提高运算速度。
Based on the simulation positioning principle and its corresponding algorithm previously proposed by the author, this paper proposes an improved principle ── forward simulation positioning principle. The improved principle is that by recognizing the essence of the forward simulation of the common record and setting aside the factor of the offset imaging, the forward modeling is conducted. Therefore, using the same calculation formula based on the positioning principle 2, the same calculation speed can be increased by a hundred times in the case of obtaining the same forward record of the same shot record with the same one-way sound wave equation.