【摘要】 对常规的剩余静校正反演方法进行了分析,找出了大静校正量使剩余静校正反演产生"周波跳跃"的原因,发现模型道的质量与地震波的视周期有关,大静校正量是一个相对量,当静校正量大于地震波视周期的一半以上时,模型道质量变差,线性反演方法会出现"周波跳跃"现象,据此建立了合理的基于模型道的多尺度剩余静校正方法,该方法通过尺度变换,把小尺度下的大静校正量问题转变为大尺度下的小静校正量问题,从而避免"周波跳跃"的产生,同时考虑大尺度的静校正精度低的问题,采用多尺度逐步校正方法实现大静校正量的计算。实际资料的试算表明该方法是有效的,具有线性反演方法的较高计算效率特点,便于处理人员使用。更多还原

【Abstract】 The conventional inversion method for seismic residual static correction is analyzed,and the reason for it is found.The quality of model trace is related to the apparent cycle of seismic wave.As a relative quantity,when the static correction quantity is larger than a half or more of the apparent cycle,the model trace’s quality becomes poor,emerging the cyclic-skip phenomenon using linear inversion method.According to this,the multiscale residual static correction method based on model trace is developed,by which the large static correction quantity issue under small scale can be converted into the small static correction quantity issue under large scale,thus avoiding the appearance of cyclic-skip phenomenon.The low accuracy of the large scale static correction can be considered at the same time.So the large static correction quantity calculation could then be realized by using the multiscale inversion algorithm.The case study shows that this method is effective,efficient and convenient for use.更多还原