【摘要】 利用任意广角方程逆时延拓的高阶有限差分格式实现了纵波资料的叠前逆时深度偏移,给出了稳定性条件及吸收边界条件;采用归一化互相关成像条件,在成像条件的计算中摒弃双程波方程,采用单程波方程对检波点逆时延拓波场和炮点正向延拓波场进行计算,得出了最佳归一化互相关成像条件。该算法在煤田资料偏移处理中,对较深处的构造清晰成像,取得了较好的应用效果。更多还原

【Abstract】 Based on the arbitrarily wide-angle wave equations,a reverse-time propagation scheme was applied in the prestack resverse-time depth migration,the stability conditions and the absorbing boundary ones of the equations were also given.With the double wave equation abandoned in the imaging conditions,an optimal normalization imaging conditon was concluded by using the single wave equation to calculate the reverse time wave field and the forward wave field.The method has obtained distinct imaging and good results in the migration of the coal field data.更多还原