自适应转换波炮域偏移方法的研究与应用

Research and Application for Auto-adaptive converted wave shot- domain migration

抛开常规的转换点位置估计及极性校正,把检波点作为虚拟震源,利用单程波方程实现转换波记录的炮域偏移处理。由于该方法具有无需寻找转换点位置和进行极性校正的自适应特性,尤其适合于复杂构造转换波记录成像,并且在整个偏移处理流程中减少了估算转换点位置这一环节,有利于偏移精度的进一步提高,同时提高了运算效率。理论模型及实际资料的处理效果论证了该方法的正确性和有效性。

We suggest a method abandoning the search for common converted points and adjusting polars, and taking receive point as fictitious source, and using one way wave equation performance to converted wave migration in shot domain. Because the method carries on the auto-adapted characteristic which does not need to seek for the converted point position and adjust polarity, especially suits the complex structure converted wave imaging, and reduces the link that estimating converted point position in the entire processing flow, advantageous in raising precision and efficiency. The processing effect pf the theoretical model and field data has proven that the methodis correct and effective.