在开展井下地震试验时,井的存在对观测结果有很大影响。遗憾的是,在模拟算法中考虑井时就不能采用某些方法(如频率-波数法),从而需付出较大的代价采用其它方法(如有限差分法)。为了解决这一问题,我们引入了有效炮/检点排列的概念。通过分布式炮/检点以显式方式代替井。这种方法可在不明显增 The well presence has a great impact on the observation results when conducting downhole seismic tests. Unfortunately, some methods (such as frequency-wavenumber) can not be used when considering wells in an analog algorithm, and other methods (such as finite difference methods) are more expensive. In order to solve this problem, we have introduced the concept of an effective gun / checkpoint arrangement. Wells are replaced explicitly by distributed gun / checkpoint. This method is not obvious increase