任意点震源τ-P域地震图的解及AVO分析

用严格的数学推导得出τ-P域地震图的解析解。分析表明,τ-P域中地震图的子波可表示为激发震源子波的积分形式,决定反射波振幅的因素是平面波反射系数、反射界面上覆介质的波速以及方向因子。这些结果说明:1.在τ-P域进行AVO分析是可行的,并具有更高的精度;2.从一种新的途径可以进行速度函数的反演计算。

THE ANALYTICAL SOLUTIONS OF SEISMOGRAMS IN t-P DOMAIN FOR ARBITRARY POINT-SOURCE AND AVO ANALYSIS

We have strictly derived out the analytical solutions of seismograms,with which arbitrary point-source is concerned,in t-P domain It is indicated through analysis that the wavelet of seismograms in t-P domain is the integral form of the source wavelet,that the factors which affect the reflection amplitude are plance-wave reflection coefficiant,the velocity of medium covered upon the reflector,and a direction factor.Those results show that it has a possibility to take AVO analysis in t-P realm and the results will have higher precision and it gives us a new way to inverse velocity function.