等偏移距自动初至静校正

Automatic refraction static correction in common offset domain.

茅金根 ,梁秀文 ,杨午阳 ,冯有奎 .等偏移距自动初至静校正 .石油地球物理勘探 ,2 0 0 2 ,37(5 ) :4 6 9～ 4 72 本文提出一种自动计算静校正量的新方法。它首先在等偏移距道集内对相邻道的初至波采用高精度相关构建一个关于炮、检时差的超大矩阵方程 ,然后采用优化统计迭代算法求解炮点和检波点的静校正量 ,并用概率分布函数确定精确的炮、检静校正量 ,最后用误差校正函数消除炮、检静校正误差。实际资料处理结果表明 ,本方法自动、省时、精度高。

The paper persented a new method for automatically calculating the refraction statics. The method first constitutes a super giant matrix equation of shot receiver time difference between first breaks of adjacent trace in common offset gather by using high precise correlation; then, solves the shot and receiver statics by using an algorithm of optimum statistical iteration and defines accurate shot and receiver statics using a probability distribution function; finally, the errors of shot and receiver statics are eliminated by using errors correction function. The real data processing shows that the method is automatic, time efficient and high accurate.