改进的正演模拟定位原理

Improved positioning principle of forward modeling

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。

On the basis of both their old positioning principle of forward modeling andcorresponding algorithm, the authors bave advanced a new positioning principle:positioning principle 2 of forward modeling. The new positioning principle appliesto forward modeling, and it only involves the essential of forward modeling of com-mon-shot seismogram without considering migration. Hence, computation formulabased 0n positioning principle 2 can speed up operation by hundred times on condi-tion that equivalent forward modelings of the same common-shot seismograms areachieved by uslng one way acoustic wave equation.