速度分析判别准则的研究

RESEARCH FOR THE DISCRIMINATION CRITERION OF VELOCITY ANALYSIS

江汉石油学院

共反射点上反射波波形的相似性和单层均匀地层中地震波的传播规律,是地震勘探中速度分析的两个依据条件。由于引入了用来刻划反射波波形相似程度的速度分析判别因子,从而使速度分析变成为以试算速度为变量的一维函数的最优化问题。本文由此给出了一种推导速度分析判别准则的新方法,并完成了它的理论证明。速度分析判别准则是在一定条件下成立的,因此,在用它进行速度分析时应当注意这些条件是否得到了满足。

The similarity of the reflected waveforms at the common depth point and the regularity of the propagation of seismic waves in a single homogeneous stratum are the basis of seismic velocity analysis. Because of the introducing of the velocity analysis discrimination factor which is used to portray the similarity of the reflected waveforms, the problem of velocity analysis thus become such a problem of making the one-dimension function with the testing velocity as its variable optimized. The velocity analysis discrimination factor was thuswise derived and its theoretical proving was also given. The velocity analysis discrimination criterion is unfalseness only when it is under the given conditions. Hence, while the velocity analysis is being carried out, attentions should be paid to see if these conditions are satisfied.