地震资料分步最优化反演方法

利用地震资料分步最优化演可以构成一种新的无井ＬＯＧ处理方法。该法不采用井中信息和不用人工干预，用分步最优化的方法求取正确的导速度信息，其步骤是：（１）采用奥登伯格的算法，在反演前对地震记录进行预处理；（２）用模拟退火法计算层速度，获取较好的低频分量；（３）用低频分量作为反演解的初始猜测值，再用共轭梯度法进行迭代计算，获得更精确的层速度信息。经理论模型和实际资料处理结晶验证，该法的精度高，稳定性好，

Step-optimized inversion of seismic data

Step-optimized inversion of seismic data leads to a new borehole-free LOG processing method. The method offers interval velocity informations by making steped optimization, without the use of borehole in formations and man's intervention. Itinvolves in the steps:. Use Oldenburg's algorithm to preprocess seismic data before inversion.. Compute interval velocity and good low-frequency components by modeledannealing method.. Take the low-frequency components as initial guess values of inversion.. Do iterative operation for better interval velocity informations by using conjugate gradient method.Theoretical modeling and data processing show that this method is characterized by high accuracy, good stability, excellent adaptability and nice noise-resistantability, and that it results in high-resolution synthetic seismograms.